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WO2024237334A1 - Module de cellule solaire - Google Patents

Module de cellule solaire Download PDF

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Publication number
WO2024237334A1
WO2024237334A1 PCT/JP2024/018308 JP2024018308W WO2024237334A1 WO 2024237334 A1 WO2024237334 A1 WO 2024237334A1 JP 2024018308 W JP2024018308 W JP 2024018308W WO 2024237334 A1 WO2024237334 A1 WO 2024237334A1
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WO
WIPO (PCT)
Prior art keywords
solar cell
electrode
cell module
extraction electrode
width
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/018308
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English (en)
Japanese (ja)
Inventor
浩平 藤田
浩孝 佐野
弥生 根本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to JP2025520649A priority Critical patent/JPWO2024237334A1/ja
Publication of WO2024237334A1 publication Critical patent/WO2024237334A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/40—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising a p-i-n structure, e.g. having a perovskite absorber between p-type and n-type charge transport layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/50—Photovoltaic [PV] devices
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/80—Constructional details
    • H10K30/89—Terminals, e.g. bond pads
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K39/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic radiation-sensitive element covered by group H10K30/00
    • H10K39/10—Organic photovoltaic [PV] modules; Arrays of single organic PV cells
    • H10K39/18—Interconnections, e.g. terminals

Definitions

  • This disclosure relates to solar cell modules.
  • the solar cell module comprises a front substrate, a back substrate, a solar cell section including a plurality of power generation sections, and a first extraction electrode.
  • the front substrate has a first surface and a second surface opposite to the first surface.
  • the back substrate has a third surface and a fourth surface opposite to the third surface.
  • the third surface faces the second surface.
  • Each of the plurality of power generation sections generates electricity in response to incidence of light.
  • the plurality of power generation sections are aligned in a first direction along the second surface.
  • the first extraction electrode is an electrode for extracting electricity generated by power generation in the plurality of power generation sections to the outside of the solar cell module.
  • the first extraction electrode includes a first A portion including a first connection portion, and a second A portion.
  • the first connection portion includes a portion that is exposed to the outside of the solar cell module and to which a conductor is connected.
  • the second A portion electrically connects the solar cell section to the first A portion.
  • the remaining portions of the solar cell unit and the first extraction electrode, excluding the first connection portion, are located between the front substrate and the rear substrate.
  • the first A portion includes an area located between the solar cell unit and the rear substrate along each of the second direction and the first direction, which is a direction along the second surface and perpendicular to the first direction.
  • the first A portion has a first A electrode surface facing the third surface.
  • the second A portion has a second A electrode surface facing the second surface.
  • the first A width which is the width of the first A electrode surface in the first direction, is larger than the second A width, which is the width of the second A electrode surface in the first direction.
  • FIG. 1 is a cross-sectional view that illustrates an example of a virtual cross section of a solar cell module according to a first embodiment.
  • FIG. 2 is a cross-sectional view that illustrates an example of a virtual cross section of the solar cell module taken along the position II-II in FIG. 1, viewed in the +Z direction.
  • FIG. 3 is a cross-sectional view that illustrates an example of a virtual cross section of the solar cell module taken along the position III-III in FIG. 1, viewed in the +Z direction.
  • FIG. 4 is a cross-sectional view that illustrates an example of a virtual cross section of the solar cell module taken along position IV-IV in FIG. 1, viewed in the -Z direction.
  • FIG. 1 is a cross-sectional view that illustrates an example of a virtual cross section of a solar cell module according to a first embodiment.
  • FIG. 2 is a cross-sectional view that illustrates an example of a virtual cross section of the solar cell module taken along the position II-II
  • FIG. 5 is a diagram illustrating an example of a schematic configuration of a power generating section and its surrounding area in the solar cell module according to the first embodiment.
  • FIG. 6 is a cross-sectional view that illustrates a first other example of a virtual cross section of the solar cell module according to the first embodiment.
  • FIG. 7 is a cross-sectional view that illustrates a second example of a virtual cross section of the solar cell module according to the first embodiment.
  • FIG. 8 is a cross-sectional view that illustrates a schematic third example of a virtual cross section of the solar cell module according to the first embodiment.
  • FIG. 9 is a cross-sectional view that illustrates a schematic diagram of another example of a virtual cross section at a position corresponding to the cross-sectional view of FIG.
  • FIG. 10 is a cross-sectional view that illustrates another example of a virtual cross-section at a position corresponding to the cross-sectional view of FIG. 4 in the solar cell module according to the first embodiment.
  • FIG. 11 is a diagram showing another fourth example of the virtual cross section of the solar cell module according to the first embodiment.
  • FIG. 12 is a flowchart showing an example of the flow of manufacturing steps in the method for manufacturing the solar cell module according to the first embodiment.
  • FIG. 13 is a cross-sectional view that illustrates an example of a virtual cross section of a solar cell module according to the second embodiment.
  • FIG. 14 is a cross-sectional view that illustrates an example of a virtual cross section of a solar cell module according to a third embodiment.
  • FIG. 15 is a cross-sectional view that illustrates an example of a virtual cross section of a solar cell module according to a fourth embodiment.
  • thin-film solar cell modules have a structure in which electricity generated in the power generation section is extracted to the outside of the solar cell module by an extraction electrode. It has been known that the cross-sectional area of the extraction electrode can be increased to reduce power loss inside the solar cell module.
  • the extraction electrode and the power generation section are positioned along a substrate having the same light-transmitting property.
  • the power generation section and the extraction electrode are each positioned along this substrate.
  • the extraction electrode is enlarged to increase the cross-sectional area of the extraction electrode along an imaginary plane perpendicular to the surface of the substrate, the area of the region in which the power generation section can be positioned along the substrate when the substrate on the light-receiving surface side is viewed in plan view may decrease, resulting in a decrease in the output of the solar cell module.
  • the inventors of the present disclosure have therefore created a technology that can increase the cross-sectional area of the extraction electrode of a solar cell module without reducing the area of the region where the power generating unit is arranged along the substrate on the light-receiving side.
  • the inventors of the present disclosure have created a technology that can improve the output of a solar cell module.
  • the drawings include diagrams with a right-handed XYZ coordinate system appropriately attached.
  • the +Z direction is set to be vertically upward (also referred to as vertically upward or upward).
  • the -Z direction is set to be vertically downward (also referred to as vertically downward or downward).
  • the +Z direction and the -Z direction are not particularly distinguished from each other, and the +Z direction and the -Z direction may be collectively referred to as the Z direction as a term indicating the up-down direction.
  • the +X direction is set to any one direction along a virtual plane (hereinafter referred to as a virtual plane or a virtual horizontal plane) perpendicular to the vertical direction.
  • the vertical direction may be, for example, vertically downward.
  • the -X direction is set to the opposite direction to the +X direction along the virtual plane.
  • the +X direction and the -X direction are not particularly distinguished from each other, and the +X direction and the -X direction may be collectively referred to as the X direction as a term indicating a direction along the virtual plane.
  • the +Y direction is set to a direction perpendicular to the +X direction and along a virtual horizontal plane.
  • the +Y direction is a direction that constitutes a right-handed XYZ coordinate system together with the +X direction and the +Z direction.
  • the -Y direction is set to a direction opposite to the +Y direction along the virtual plane.
  • the +Y direction and the -Y direction are not distinguished from each other, and the +Y direction and the -Y direction may be collectively referred to as the Y direction as a term indicating a direction perpendicular to the X direction along the virtual horizontal plane.
  • the X direction is an example of a first direction in a solar cell module. More specifically, the +X direction is an example of a first A direction in a solar cell module.
  • the -X direction is an example of a first B direction in a solar cell module.
  • the Y direction is an example of a second direction in a solar cell module. More specifically, the +Y direction is an example of a second A direction in a solar cell module.
  • the -Y direction is an example of a second B direction in a solar cell module.
  • the Z direction is an example of a third direction in a solar cell module. More specifically, the +Z direction is an example of a third A direction in the solar cell module, and the -Z direction is an example of a third B direction in the solar cell module.
  • the distance between two points or two objects in the Z direction may be referred to as the width, height, or thickness along the Z direction.
  • the distance between two points or two objects in the X direction may be referred to as the width along the X direction.
  • the distance between two points or two objects in the Y direction may be referred to as the width along the Y direction.
  • FIG. 1 is a cross-sectional view that shows a schematic example of a virtual cross-section of the solar cell module 1 according to the first embodiment.
  • the example of the virtual cross-section of the solar cell module 1 shown in Fig. 1 may be an example of a cross-section of the solar cell module 1.
  • the solar cell module 1 includes a front substrate 10, a back substrate 80, a solar cell section 2 including a plurality of power generating sections 30, and one or more extraction electrodes 50.
  • the solar cell section 2 includes, for example, one or more solar cell elements 3.
  • the solar cell section 2 includes four solar cell elements 3 as the one or more solar cell elements 3.
  • the four solar cell elements 3 are a first solar cell element 3a, a second solar cell element 3b, a third solar cell element 3c, and a fourth solar cell element 3d.
  • the solar cell section 2 may include one solar cell element 3, two solar cell elements 3, three solar cell elements 3, or any number of solar cell elements 3, including five or more.
  • the solar cell module 1 includes a surface substrate (also called a first substrate) 10, a transparent electrode 20, a power generating section 30, a back electrode 40, one or more extraction electrodes 50, and a back substrate (also called a second substrate) 80.
  • each of the one or more solar cell elements 3 includes, for example, a transparent electrode 20 as a first electrode, a power generating section 30, and a back electrode 40 as a second electrode.
  • the solar cell module 1 may also include a filler 60.
  • the solar cell module 1 may also include, for example, one or more conductive sections 21.
  • the one or more conductive sections 21 may include a first conductive section 21f and a second conductive section 21s.
  • the one or more extraction electrodes 50 may include a first extraction electrode 50f or may include a second extraction electrode 50s.
  • the first extraction electrode 50f is an example of an extraction electrode 50.
  • the second extraction electrode 50s is another example of the extraction electrode 50.
  • the solar cell module 1 may include, for example, the first conductive portion 21f and the first extraction electrode 50f, or the second conductive portion 21s and the second extraction electrode 50s.
  • the solar cell module 1 may further include one or more reflectors 70.
  • the transparent electrode 20 may be in contact with the front surface base material 10.
  • the power generation portion 30 may be in contact with the transparent electrode 20.
  • a part of the power generation portion 30 may be in contact with the front surface base material 10.
  • the back surface electrode 40 may be in contact with the power generation portion 30.
  • the first conductive portion 21f may be in contact with the transparent electrode 20.
  • the second conductive portion 21s may be in contact with the back surface electrode 40.
  • the first extraction electrode 50f may be in contact with the first conductive portion 21f.
  • the second extraction electrode 50s may be in contact with the second conductive portion 21s.
  • the material of the conductive portion 21 is the same as the material of the transparent electrode 20, the conductive portion 21 may be considered as the transparent electrode 20.
  • the extraction electrode 50 may be in contact with the transparent electrode 20.
  • a part of the extraction electrode 50 may be in contact with, for example, the front substrate 10 or the back substrate 80.
  • the following description describes a configuration in which multiple power generation units 30 are lined up along the X direction as the first direction.
  • the direction in which the multiple power generation units 30 are lined up may be the X direction as the first direction. More specifically, the direction in which the multiple power generation units 30 are lined up may be the +X direction as the first A direction, or the -X direction as the first B direction.
  • the following description describes a configuration in which multiple solar cell elements 3 as one or more solar cell elements 3 are lined up along the X direction as the first direction. In other words, the direction in which the multiple solar cell elements 3 are lined up may be the X direction as the first direction.
  • the direction in which the multiple solar cell elements 3 are lined up may be the +X direction as the first A direction, or the -X direction as the first B direction.
  • the multiple solar cell elements 3 may be electrically connected in series.
  • the back electrode 40 of the first solar cell element 3a and the transparent electrode 20 of the second solar cell element 3b may be connected to each other, so that the first solar cell element 3a and the second solar cell element 3b are electrically connected in series.
  • the back electrode 40 of the second solar cell element 3b and the transparent electrode 20 of the third solar cell element 3c may be connected to each other, so that the second solar cell element 3b and the third solar cell element 3c are electrically connected in series.
  • the back electrode 40 of the third solar cell element 3c and the transparent electrode 20 of the fourth solar cell element 3d may be connected to each other, so that the third solar cell element 3c and the fourth solar cell element 3d are electrically connected in series.
  • the back substrate 80 is positioned in a form facing the front substrate 10.
  • the solar cell module 1 has a space (also called an internal space or gap space) IS between the front substrate 10 and the back substrate 80.
  • a space also called an internal space or gap space
  • the internal space IS may be a gap located between the front substrate 10 and the back substrate 80.
  • the certain cross section may be a cross section of the solar cell module 1 along a virtual plane intersecting both the front substrate 10 and the back substrate 80.
  • the solar cell module 1 other components different from the front substrate 10 and the back substrate 80 among the multiple elements (also called components) constituting the solar cell module 1 may be located in the internal space IS.
  • other components of the solar cell module 1 may be located between the front substrate 10 and the back substrate 80.
  • the other components include, for example, the solar cell unit 2.
  • the other components may include the power generation unit 30, etc.
  • the solar cell section 2 including the multiple power generation sections 30 may be located between the front substrate 10 and the back substrate 80.
  • These other components may include, for example, the conductive section 21, or at least a part of the extraction electrode 50.
  • These other components may include, for example, the reflective material 70.
  • the solar cell module 1 has, for example, a light receiving surface FL and a back surface FR.
  • the light receiving surface FL may be, for example, the surface on the +Z direction side of the outer surface of the solar cell module 1, which corresponds to the 3A direction.
  • the back surface FR may be, for example, the surface on the -Z direction side of the outer surface of the solar cell module 1, which corresponds to the 3B direction opposite to the 3A direction.
  • FIG. 2 is a cross-sectional view showing an example of a virtual cross section of the solar cell module 1 viewed in the +Z direction as the 3A direction at position II-II in FIG. 1.
  • the cross-sectional view showing an example of a virtual cross section of the solar cell module 1 viewed in the +Y direction at position I-I in FIG. 2 corresponds to the cross-sectional view in FIG. 1.
  • the filler 60 is omitted for convenience.
  • each of the transparent electrode 20 and the power generation unit 30 may be present along the +Y direction as the 2A direction (or the -Y direction as the 2B direction).
  • Each of the transparent electrode 20 and the power generation unit 30 may be present continuously along the +Y direction as the 2A direction (or the -Y direction as the 2B direction), or may have a partial gap present midway in the +Y direction as the 2A direction (or the -Y direction as the 2B direction).
  • the conductive portion 21 may be present along the +Y direction as the second A direction (or the -Y direction as the second B direction).
  • the conductive portion 21 may be present, for example, continuously along the +Y direction as the second A direction (or the -Y direction as the second B direction), or may have a partial gap present midway along the +Y direction as the second A direction (or the -Y direction as the second B direction).
  • FIG. 3 is a cross-sectional view showing an example of a virtual cross section of the solar cell module 1 viewed in the +Z direction as the 3A direction at position III-III in FIG. 1.
  • the cross-sectional view showing an example of a virtual cross section of the solar cell module 1 viewed in the +Y direction at position I-I in FIG. 3 corresponds to the cross-sectional view in FIG. 1.
  • the filler 60 is omitted for convenience.
  • the back electrode 40 exists along the +Y direction as the 2A direction (or the -Y direction as the 2B direction).
  • the back electrode 40 may exist continuously along the +Y direction as the 2A direction (or the -Y direction as the 2B direction), or may have a partial gap existing midway in the +Y direction as the 2A direction (or the -Y direction as the 2B direction).
  • FIG. 4 is a cross-sectional view showing an example of a virtual cross section of the solar cell module 1 viewed in the -Z direction as the third B direction at position IV-IV in FIG. 1.
  • the cross-sectional view showing an example of a virtual cross section of the solar cell module 1 viewed in the +Y direction at position I-I in FIG. 4 corresponds to the cross-sectional view in FIG. 1.
  • the filler 60 is omitted for convenience.
  • the extraction electrode 50 exists along the +Y direction as the second A direction (or the -Y direction as the second B direction).
  • the extraction electrode 50 may exist continuously along the +Y direction as the second A direction (or the -Y direction as the second B direction), or may have a partial gap existing midway in the +Y direction as the second A direction (or the -Y direction as the second B direction).
  • the surface substrate 10 is located on the light-receiving surface FL side of the solar cell module 1.
  • the surface of the surface substrate 10 may, for example, constitute the light-receiving surface FL of the solar cell module 1.
  • the surface substrate 10 may be a substrate that is located on the +Z direction side as the third A direction among the substrates included in the solar cell module 1.
  • the first surface F1 may be, for example, a surface of the surface base material 10 that is located on the +Z direction side as the third A direction.
  • the face F1 may be, for example, the light receiving face FL of the solar cell module 1.
  • the second face F2 is the face of the front base material 10 opposite to the first face F1.
  • the second face F2 is For example, it may be a surface of the front surface base material 10 located on the ⁇ Z direction side as the third B direction. It may be located along the second face F2.
  • the surface substrate 10 has translucency.
  • the surface substrate 10 may have translucency for light of a specific range of wavelengths (also referred to as a specific wavelength region).
  • the specific wavelength region may include, for example, a wavelength region of light that can be absorbed by the photoelectric conversion unit 32 included in the power generation unit 30 to cause photoelectric conversion.
  • the specific wavelength region may include a wavelength region of visible light of about 400 nanometers (nm) to 700 nm and a wavelength region of infrared light of about 700 nm to 1200 nm.
  • the surface substrate 10 may have, for example, insulating properties.
  • glass or resin having translucency and insulating properties is applied as the material of the surface substrate 10.
  • the resin that can be used include acrylic, polycarbonate, and polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • the surface substrate 10 may be in the form of, for example, a flat plate, a sheet, or a film.
  • the thickness of the surface substrate 10 may be, for example, about 0.01 millimeters (mm) to 5 mm.
  • the rear surface substrate 80 faces the front surface substrate 10.
  • the rear surface substrate 80 is located on the rear surface FR side, which is the surface of the solar cell module 1 opposite to the light receiving surface FL.
  • the surface of the rear surface substrate 80 may, for example, constitute the rear surface FR of the solar cell module 1.
  • the rear surface substrate 80 may be a substrate located on the -Z direction side as the 3B direction among the substrates included in the solar cell module 1.
  • the rear surface substrate 80 has a third surface F3 and a fourth surface F4.
  • the third surface F3 faces the second surface F2 of the front surface substrate 10.
  • the third surface F3 may be, for example, a surface located on the +Z direction side as the 3A direction among the rear surface substrate 80.
  • the fourth surface F4 is a surface of the rear surface substrate 80 opposite to the third surface F3.
  • the fourth surface F4 may be, for example, a surface located on the -Z direction side as the 3B direction among the rear surface substrate 80.
  • the fourth surface F4 may be, for example, a surface located on the -Z direction side as the 3B direction among the rear surface substrate 80.
  • the fourth surface F4 may be, for example, the rear surface FR of the solar cell module 1.
  • the material of the back substrate 80 is, for example, glass or resin having translucency and insulating properties, like the front substrate 10.
  • the resin that can be used include acrylic, polycarbonate, and polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • the shape of the back substrate 80 may be, for example, a flat plate, sheet, or film.
  • the thickness of the back substrate 80 may be, for example, about 0.01 mm to 5 mm.
  • the rear substrate 80 may or may not be translucent to light in a specific wavelength range.
  • the specific wavelength range may include, for example, a wavelength range of light that can be absorbed by the photoelectric conversion unit 32 included in the power generation unit 30 to cause photoelectric conversion.
  • the rear substrate 80 is translucent, for example, light irradiated to the rear surface FR of the solar cell module 1 can pass through the rear substrate 80 and reach the photoelectric conversion unit 32. This can improve the amount of power generation of the solar cell module 1.
  • Fig. 5 is a diagram that shows a schematic example of the general configuration of the power generating section 30 and its peripheral portion in the solar cell module 1 according to the first embodiment. That is, Fig. 5 is a schematic diagram that shows an example of the structure related to the power generating section 30 in the solar cell module 1. From another perspective, Fig. 5 is a diagram that shows a schematic example of the configuration of one solar cell element 3 in the solar cell module 1.
  • the power generating unit 30 is a portion that can generate power in response to the incidence of light. In other words, each of the multiple power generating units 30 generates power in response to the incidence of light.
  • the power generating unit 30 may be located, for example, between the transparent electrode 20 and the back electrode 40.
  • the power generating unit 30 has a first element surface FC1 on which light is incident, and a second element surface FC2 located on the opposite side of the first element surface FC1.
  • the first element surface FC1 is the surface of the power generating unit 30 on the +Z direction side as the third A direction
  • the second element surface FC2 is the surface of the power generating unit 30 on the -Z direction side as the third B direction.
  • the power generating unit 30 is located between the front substrate 10 and the back substrate 80.
  • the power generating unit 30 is located between the front substrate 10 and the back substrate 80 in the Z direction as the third direction.
  • the solar cell unit 2 including the multiple power generating units 30 may be located between the front substrate 10 and the back substrate 80.
  • the front surface substrate 10, the power generation section 30, and the back surface substrate 80 are positioned in this order in the -Z direction, which is the third B direction.
  • the power generation section 30 has, for example, a first carrier transport section 31, a photoelectric conversion section 32, and a second carrier transport section 33.
  • the transparent electrode 20, the first carrier transport section 31, the photoelectric conversion section 32, the second carrier transport section 33, and the back electrode 40 are stacked in the order described above on the surface substrate 10. Note that, for example, a configuration in which at least one of the first carrier transport section 31 and the second carrier transport section 33 does not exist can also be envisioned.
  • the power generating units 30 are located between the front surface substrate 10 and the rear surface substrate 80 in the Z direction as the third direction.
  • the solar cell elements 3 may be located on the second surface F2 of the front surface substrate 10. In other words, the solar cell elements 3 may be in contact with the front surface substrate 10.
  • the power generating units 30 may be located on the second surface F2 of the front surface substrate 10 directly or via the transparent electrode 20. In other words, the power generating units 30 may be in contact with the front surface substrate 10 directly or via the transparent electrode 20.
  • the front surface substrate 10 may be considered to support the solar cell elements 3, or the front surface substrate 10 may be considered to support the power generating units 30.
  • the multiple solar cell elements 3 may be arranged, for example, along the +X direction as the first A direction. More specifically, the multiple solar cell elements 3 may be arranged, for example, along a virtual plane along both the +X direction as the first A direction and the +Y direction as the second A direction. In other words, the multiple solar cell elements 3 may be arranged, for example, in a planar manner. From another perspective, the multiple power generation units 30 are arranged along the X direction as the first direction along the second surface F2 of the surface substrate 10. In other words, the multiple power generation units 30 may be arranged, for example, along the +X direction as the first A direction.
  • the multiple power generation units 30 may be arranged, for example, along a virtual plane along both the +X direction as the first A direction and the +Y direction as the second A direction.
  • the multiple power generation units 30 may be arranged, for example, in a planar manner.
  • arranged in a planar manner means that each of the multiple power generation units 30 is located and arranged along a virtual or actual plane.
  • the power generating units 30 are arranged along the second surface F2 of the surface base material 10.
  • four power generating units 30 are arranged along the second surface F2 of the surface base material 10 in the +X direction as the first A direction.
  • the first carrier transport section 31 is located, for example, on the transparent electrode 20. More specifically, the first carrier transport section 31 is located on the -Z direction side of the transparent electrode 20 as the third B direction.
  • a semiconductor having an n-type conductivity type as the first conductivity type also referred to as an n-type semiconductor
  • the first carrier transport section 31 has, for example, a function as a so-called hole blocking layer and an electron transport layer (Electron Transport Layer: ETL).
  • ETL electron transport layer
  • the electron transport layer can, for example, collect and output electrons.
  • the material of the first carrier transport section 31 is a transparent conductive oxide (TCO) that is transparent to light in a specific wavelength range.
  • TCO transparent conductive oxide
  • the thickness of the first carrier transport section 31 may be set to, for example, about 10 nanometers (nm) to 50 nm.
  • the first carrier transport section 31 may be formed on the transparent electrode 20 and/or the surface substrate 10 by a vacuum process such as sputtering.
  • the photoelectric conversion section 32 is located, for example, on the first carrier transport section 31. More specifically, the photoelectric conversion section 32 is located on the ⁇ Z direction side of the first carrier transport section 31 as the third B direction.
  • the photoelectric conversion section 32 can absorb, for example, light transmitted through the front surface substrate 10 and the back surface substrate 80.
  • an intrinsic semiconductor also referred to as an i-type semiconductor
  • a semiconductor having a perovskite structure also referred to as a perovskite semiconductor
  • the perovskite semiconductor can include, for example, a halide-based organic-inorganic perovskite semiconductor.
  • the halide-based organic-inorganic perovskite semiconductor is a semiconductor having a perovskite structure with a composition of ABX3 .
  • one or more ions of methylammonium (CH 3 NH 3 ), formamidinium (CH (NH 2 ) 2 ), cesium (Cs), rubidium (Rb) and potassium (K) are applied to A.
  • one or more ions of lead (Pb) and tin (Sn) are applied to B.
  • one or more ions of iodine (I), bromine (Br) and chlorine (Cl) are applied to X.
  • a semiconductor having a perovskite structure with a composition of ABX 3 may be composed of an organic perovskite such as CH 3 NH 3 PbI 3 or (CH (NH 2 ) 2 , Cs) Pb (I, Br) 3.
  • the organic perovskite can be formed, for example, by applying the first raw material liquid on the first carrier transport unit 31 and then drying the applied first raw material liquid.
  • the organic perovskite may be a thin film having crystallinity.
  • the first raw material liquid may be generated, for example, by dissolving the raw materials, ie, halogenated alkylamine and lead halide, in a solvent.
  • the thickness of the photoelectric conversion unit 32 may be, for example, about 100 nm to 2000 nm.
  • the second carrier transport section 33 is located, for example, on the photoelectric conversion section 32. More specifically, the second carrier transport section 33 is located on the -Z direction side of the photoelectric conversion section 32, which is the third B direction.
  • the material of the second carrier transport section 33 may be, for example, a semiconductor having a p-type conductivity as the second conductivity type (also called a p-type semiconductor).
  • the second carrier transport section 33 has, for example, the functions of a so-called electron blocking layer and a hole transport layer (Hole Transfer Layer: HTL).
  • the hole transport layer can, for example, collect and output holes.
  • the material of the second carrier transport section 33 may be, for example, a soluble diamine derivative, [2,2',7,7'-Tetrakis-(N,N-di-P-methoxyphenylamino)-9,9'-spirobifluorene (spiro-OMeTAD)].
  • the second carrier transport section 33 may be produced, for example, by applying a second raw material liquid onto a layer of a perovskite semiconductor as the photoelectric conversion section 32, and then drying the applied second raw material liquid.
  • the second raw material liquid may be produced, for example, by dissolving the material of the second carrier transport section 33 in a solvent.
  • An organic solvent such as chlorobenzene may be used as the solvent.
  • the thickness of the second carrier transport section 33 may be, for example, about 50 nm to 200 nm.
  • the material of the second carrier transport part 33 may be poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA), poly(3-hexylthiophene-2,5-diyl) (P3HT), poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS), etc.
  • the filler 60 is filled in the gap, for example, in the space (internal space) IS between the front substrate 10 and the back substrate 80. In other words, the filler 60 is filled in the gap between the front substrate 10 and the back substrate 80.
  • the filler 60 covers the solar cell section 2 from the rear substrate 80 side in a space (internal space) IS between the front substrate 10 and the rear substrate 80.
  • the filler 60 may be disposed in the space (internal space) IS between the front surface substrate 10 and the back surface substrate 80, as described later.
  • the filler 60 may cover the extraction electrodes 50 except for the connection parts PC.
  • the filler 60 may have insulating properties.
  • the filler 60 is positioned in the internal space IS in a state where it covers the power generating units 30.
  • the filling material 60 is translucent to light in a specific wavelength range, for example.
  • the material for the filler 60 include ethylene-vinyl acetate (EVA), polyvinyl acetal such as polyvinyl butyral (PVB), and acid-modified resin.
  • EVA ethylene-vinyl acetate
  • PVB polyvinyl butyral
  • acid-modified resin for example, modified polyolefin resins that can be formed by graft-modifying polyolefin resins with an acid are applied.
  • Acids that can be used for graft-modifying the acid-modified resins include, for example, acrylic acid, methacrylic acid, One or more of the following acids may be applied: maleic acid, fumaric acid, itaconic acid, maleic anhydride, himic anhydride, itaconic anhydride and citraconic anhydride.
  • the transparent electrode 20 may be located along the second surface F2 of the surface substrate 10.
  • the transparent electrode 20 is located, for example, on the surface substrate 10. More specifically, The transparent electrode 20 may be located on the second face F2 of the front substrate 10.
  • the transparent electrode 20 can collect carriers generated by the photoelectric conversion unit 32.
  • the transparent electrode 20 can, for example, The transparent electrode 20 can serve as an electrode (also called a negative electrode) that collects electrons from the surface substrate 10.
  • the transparent electrode 20 can be formed on the surface substrate 10 by a vacuum process such as sputtering.
  • the transparent electrode 20 may be formed on the surface substrate 10 by applying ink in which the material of the transparent electrode 20 is dissolved.
  • a material having translucency and electrical conductivity is used as the material of the transparent electrode 20.
  • a transparent conductive oxide (TCO) having translucency for light in a specific wavelength range may be used as the material of the transparent electrode 20.
  • the TCO is not particularly limited, and examples thereof include indium tin oxide (ITO), aluminum-doped zinc oxide (AZO), boron-doped zinc oxide (BZO), gallium-doped zinc oxide (GZO), fluorine-doped tin oxide (FTO), antimony-doped tin oxide (ATO), titanium-doped indium oxide (ITiO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZO), and tantalum-doped tin oxide (SnO2 ) .
  • ITO indium tin oxide
  • AZO aluminum-doped zinc oxide
  • BZO boron-doped zinc oxide
  • GZO gallium-doped zinc oxide
  • the transparent conductive oxide film may include oxides such as niobium-doped tin oxide (Nb-doped tin oxide: SnO 2 :Nb), tungsten-doped tin oxide (W-doped tin oxide: SnO 2 :W), molybdenum-doped tin oxide (Mo-doped tin oxide: SnO 2 :Mo), fluorine-doped tin oxide (F-doped tin oxide: SnO 2 :F), or hydrogen-doped indium oxide (Hydrogen-doped indium oxide: IOH).
  • the transparent conductive oxide film may be a laminated film having a plurality of films.
  • a film of the above oxide may be applied to each of the plurality of films.
  • a film of tin oxide containing a dopant may be applied to the plurality of films.
  • the dopant one or more elements selected from the group consisting of indium (In), silicon (Si), germanium (Ge), titanium (Ti), copper (Cu), antimony (Sb), niobium (Nb), fluorine (F), tantalum (Ta), tungsten (W), molybdenum (Mo), bromine (Br), iodine (I), and chlorine (Cl) can be used.
  • the material of the transparent electrode 20 may be, for example, a conductive polymer such as a polythiophene derivative.
  • the material of the transparent electrode 20 may also be, for example, metal nanoparticles or metal nanowires such as silver nanowires, or a carbon material such as graphene or carbon nanotubes.
  • the back electrode 40 may be located, for example, between the transparent electrode 20 and the back substrate 80.
  • the transparent electrode 20, the power generation section 30, and the back electrode 40 may be stacked in this order in the -Z direction as the third B direction.
  • the back electrode 40 may be located, for example, on the second carrier transport section 33.
  • the back electrode 40 may be located on the -Z direction side as the third B direction of the second carrier transport section 33.
  • the back electrode 40 can collect carriers generated by photoelectric conversion in response to irradiation of light in the photoelectric conversion section 32.
  • a material having electrical conductivity is applied to the material of the back electrode 40.
  • a metal having excellent electrical conductivity such as gold (Au) or a TCO is applied to the material of the back electrode 40.
  • a layered electrode also called a first electrode layer or the like is applied to the back electrode 40.
  • the thickness of the back electrode 40 is, for example, about 10 nm to 1000 nm.
  • the back electrode 40 can be formed on the second carrier transport part 33 by a vacuum process such as sputtering.
  • the conductive portion 21 is electrically connected to the solar cell portion 2, for example.
  • the conductive portion 21 is located, for example, along the second surface F2 of the front surface substrate 10.
  • the conductive portion 21 may be located in a space (internal space) IS between the front surface substrate 10 and the rear surface substrate 80.
  • the conductive portion 21 is used to conduct carriers collected by the transparent electrode 20 or the rear surface electrode 40 in each solar cell element 3 to the extraction electrode 50.
  • a material having electrical conductivity is applied to the material of the conductive portion 21.
  • the material of the conductive portion 21 may be the same as that of the transparent electrode 20, or may be another material having electrical conductivity such as a metal.
  • the conductive portion 21 may be formed on the second surface F2 of the front surface substrate 10 by a vacuum process such as sputtering, for example, in the same manner as the transparent electrode 20.
  • the conductive portion 21 may be formed on the front surface substrate 10 by applying an ink in which the material of the conductive portion 21 is dissolved onto the second surface F2 of the front surface substrate 10, for example.
  • the solar cell module 1 may, for example, include a first conductive portion 21f corresponding to a first polarity and a second conductive portion 21s corresponding to a second polarity that is the opposite polarity to the first polarity.
  • first conductive portion 21f when the first conductive portion 21f is located on the +X direction side of the solar cell module 1 as the 1A direction, the second conductive portion 21s may be located on the -X direction side of the solar cell module 1 as the 1B direction.
  • the first conductive portion 21f may be connected to a portion of the solar cell unit 2 on the +X direction side as the 1A direction, and the second conductive portion 21s may be connected to a portion of the solar cell unit 2 on the -X direction side as the 1B direction.
  • the first conductive portion 21f is connected to the transparent electrode 20 of the first solar cell element 3a, and the second conductive portion 21s is connected to the back electrode 40 of the fourth solar cell element 3d.
  • the extraction electrode 50 may be located, for example, between the front substrate 10 and the back substrate 80, except for a connection portion PC described later. More specifically, the extraction electrode 50 may be, for example, a third In the Z direction, the extraction electrode 50 may be located between the front surface substrate 10 and the back surface substrate 80, except for a connection portion PC described later.
  • the extraction electrode 50 is connected to the conductive portion 21, for example. From another point of view, the extraction electrode 50 includes, for example, a portion located along the second surface F2 of the front surface base material 10. In the first embodiment, the extraction electrode 50 includes a portion located on the conductive portion 21 on the second face F2 of the front substrate 10.
  • the extraction electrode 50 may be in contact with, for example, the third surface F3 of the rear substrate 80.
  • a material having electrical conductivity is used as the material of the extraction electrode 50. More specifically, the material of the extraction electrode 50 may be For the conductive layer, a metal such as aluminum or copper may be used, or a conductive polymer may be used.
  • the extraction electrode 50 is electrically connected to the power generation section 30.
  • the extraction electrode 50 may be connected to the solar cell section 2 via the conductive section 21, for example, or may be connected to the solar cell section 2 without the conductive section 21. It may be directly connected to the solar cell section 2. More specifically, for example, the extraction electrode 50 may be directly connected to the transparent electrode 20 or directly connected to the back electrode 40. .
  • the extraction electrode 50 is used, for example, to extract electricity obtained by power generation in the multiple power generation units 30 to the outside of the solar cell module 1.
  • the extraction electrode 50 is an electrode for extracting electricity generated by power generation in the multiple power generation units 30 to the outside of the solar cell module 1.
  • the extraction electrode 50 is used to extract carriers collected by the transparent electrode 20 or the back electrode 40 to the outside of the solar cell module 1.
  • the extraction electrode 50 includes a connection part PC.
  • the connection part PC includes, for example, a part that is exposed to the outside of the solar cell module 1 and to which the conductor 90 is connected.
  • the conductor 90 may be, for example, a conductor for connecting the solar cell module 1 to an external device of the solar cell module 1.
  • connection part PC may be a part to which the conductor 90 is joined by solder or the like, or a part to which the conductor 90 is connected via an anisotropic conductive film or the like.
  • the connection part PC may be a part provided for joining or connecting the conductor 90, or may be a part to which the conductor 90 is joined or connected.
  • the connection part PC may be located on the +Y direction side of the extraction electrode 50 as the second A direction, as shown in FIG. 4, for example. In this case, for example, the connection part PC may protrude from the filler 60 in the +Y direction as the second A direction, or may protrude from the back surface base material 80 toward the -Z direction as the third B direction through a through hole in the back surface base material 80.
  • connection part PC may not be located on the +Y direction side of the extraction electrode 50 as the second A direction, for example.
  • the connection part PC may be located on the -Y direction side of the extraction electrode 50 as the second B direction, or may be located at any position in the +Y direction as the second A direction of the extraction electrode 50.
  • the connection part PC when the connection part PC is located on the -Y direction side of the extraction electrode 50 as the second B direction, the connection part PC may protrude from the filler 60 in the -Y direction as the second B direction, or may protrude toward the -Z direction as the third B direction through a through hole in the back surface substrate 80.
  • connection part PC when the connection part PC is located at an arbitrary position in the +Y direction as the second A direction of the extraction electrode 50, the connection part PC may protrude from the back surface substrate 80 toward the -Z direction as the third B direction through a through hole in the back surface substrate 80.
  • the connection part PC may be included, for example, in the first portion P1 of the extraction electrode 50 described later.
  • the connection part PC may be, for example, a portion of the first portion P1 of the extraction electrode 50 that protrudes from other portions. If the connection part PC is included in the first portion P1, the area of the connection part PC along the XY plane can be expanded. This can reduce the loss of power in the connection part PC.
  • the material that constitutes the connection portion PC may be the same as the material that constitutes the other parts of the extraction electrode 50, or it may be different from the material that constitutes the other parts of the extraction electrode 50.
  • one or more extraction electrodes 50 may include a first extraction electrode 50f or a second extraction electrode 50s.
  • the first extraction electrode 50f may be an electrode for extracting electricity generated by power generation in the multiple power generation units 30 to the outside of the solar cell module 1.
  • the second extraction electrode 50s may be an electrode for extracting electricity generated by power generation in the multiple power generation units 30 to the outside of the solar cell module 1.
  • the first extraction electrode 50f is an electrode corresponding to a first polarity
  • the second extraction electrode 50s may be an electrode corresponding to a second polarity that is different from the first polarity.
  • the second polarity when the first polarity is a positive electrode, the second polarity may be a negative electrode, and when the first polarity is a negative electrode, the second polarity may be a positive electrode.
  • the first extraction electrode 50f when the first extraction electrode 50f is located on the +X direction side of the solar cell module 1 as the first A direction, the second extraction electrode 50s may be located on the -X direction side of the solar cell module 1 as the first B direction.
  • the first extraction electrode 50f may be connected to the first conductive portion 21f, and the second extraction electrode 50s may be connected to the second conductive portion 21s.
  • the first extraction electrode 50f is connected to the surface of the first conductive portion 21f opposite the surface base material 10
  • the second extraction electrode 50s is connected to the surface of the second conductive portion 21s opposite the surface base material 10.
  • the first extraction electrode 50f includes a first connection portion PCf.
  • the first connection portion PCf may be an example of a connection portion PC.
  • the first connection portion PCf may be included in, for example, the first A portion P1f of the first extraction electrode 50f, which will be described later.
  • the first connection portion PCf may be, for example, a portion of the first extraction electrode 50f that protrudes from other portions in the first A portion P1f. If the first connection portion PCf is included in the first A portion P1f, the area of the first connection portion PCf along the XY plane can be enlarged. This can reduce power loss in the first connection portion PCf.
  • the first connection portion PCf includes, for example, a portion that is exposed to the outside of the solar cell module 1 and to which the first conductor 90f is connected.
  • the first conductor 90f may be an example of a conductor 90.
  • This first conductor 90f may be, for example, a conductor for connecting the solar cell module 1 to an external device of the solar cell module 1.
  • the remaining portion of the first extraction electrode 50f excluding the first connection portion PCf may be located between the front surface substrate 10 and the back surface substrate 80.
  • the second extraction electrode 50s includes a second connection portion PCs.
  • the second connection portion PCs may be an example of a connection portion PC.
  • the second connection portion PCs may be included in, for example, the first B portion P1s of the second extraction electrode 50s, which will be described later.
  • the second connection portion PCs may be, for example, a portion of the second extraction electrode 50s in the first B portion P1s that protrudes from other portions. If the second connection portion PCs is included in the first B portion P1s, the area of the second connection portion PCs along the XY plane can be enlarged. This can reduce power loss in the second connection portion PCs.
  • the second connection portion PCs includes, for example, a portion that is exposed to the outside of the solar cell module 1 and to which the second conductor 90s is connected.
  • the second conductor 90s may be an example of a conductor 90.
  • This second conductor 90s may be, for example, a conductor for connecting the solar cell module 1 to an external device of the solar cell module 1.
  • the remaining portion of the second extraction electrode 50s excluding the second connection portion PCs may be located between the front surface substrate 10 and the back surface substrate 80.
  • the reflector 70 can reflect light.
  • the reflector 70 can reflect light that enters the inside of the solar cell module 1.
  • the reflector 70 can reflect light from the solar cell unit 2 side, for example.
  • the light from the solar cell section 2 can be reflected toward the solar cell section 2.
  • the light from the solar cell section 2 can be reflected from one or more solar cell elements 3 out of the light incident on the light receiving surface FL side into the solar cell module 1.
  • the reflector 70 includes light that has passed through the solar cell unit 2 without being absorbed by the reflector 70.
  • the reflector 70 may be, for example, a front-surface mirror or a back-surface mirror.
  • the reflector 70 may be, for example, a metallic luster mirror.
  • the metal layer may have the following structure:
  • the reflector 70 is located, for example, between the power generation unit 30 and the extraction electrode 50 in the Z direction as the third direction. More specifically, the reflector 70 is located, for example, between the back electrode 40 on the power generation unit 30 and the first portion P1 of the extraction electrode 50 described later in the Z direction as the third direction. From another perspective, the reflector 70 may be located between the back electrode 40 and the extraction electrode 50 in each solar cell element 3. More specifically, the reflector 70 may be located between the back electrode 40 and the extraction electrode 50 in the +Z direction as the third A direction. In other words, for example, the reflector 70 is located between the first portion P1 and the solar cell unit 2 in the Z direction as the third direction, which is perpendicular to each of the first and second directions.
  • one reflector 70 (also referred to as the first reflector 70) is located between the first A portion P1f of the first extraction electrode 50f (described later) and the solar cell unit 2 in the Z direction as the third direction.
  • another reflector 70 (also referred to as the second reflector 70) is located between the first B portion P1s of the second extraction electrode 50s (described later) and the solar cell unit 2 in the Z direction as the third direction.
  • the reflector 70 may be located in a form in contact with the solar cell unit 2 or in a form in contact with the extraction electrode 50, for example, within a range that does not cause a short circuit.
  • the reflector 70 may be located in a form in contact with the back electrode 40 or in a form in contact with the extraction electrode 50, for example, within a range that does not cause a short circuit.
  • the reflector 70 may be located, for example, between the solar cell unit 2 or the extraction electrode 50 and the filler 60.
  • the reflector 70 may or may not be in contact with the back electrode 40 or the extraction electrode 50.
  • the filler 60 may be located between the reflector 70 and the back electrode 40 or the extraction electrode 50.
  • the structure of the extraction electrode 50 in the solar cell module 1 according to the first embodiment will be described with reference to FIG. 1 and the like.
  • the end face of the first extraction electrode 50f as one extraction electrode 50 is a surface where the first conductive part 21f and the first extraction electrode 50f as one extraction electrode 50 are in contact.
  • this end face may be an end face of the first extraction electrode 50f as one extraction electrode 50 on the +Z direction side as the 3A direction.
  • the short side direction of the first extraction electrode 50f as one extraction electrode 50 at this end face is the -X direction as the 1A direction.
  • the end face of the second extraction electrode 50s as the other extraction electrode 50 is a surface where the second conductive portion 21s and the second extraction electrode 50s as the other extraction electrode 50 are in contact with each other.
  • this end face may be an end face of the second extraction electrode 50s as the other extraction electrode 50 on the +Z direction side as the 3A direction.
  • the short side direction of the second extraction electrode 50s as the other extraction electrode 50 at this end face is the -X direction as the 1A direction.
  • the extraction electrode 50 includes a first portion P1 and a second portion P2.
  • the second portion P2 is a portion that electrically connects the solar cell unit 2 and the first portion P1.
  • the first portion P1 may be connected to the solar cell unit 2 via the second portion P2 and the conductive portion 21.
  • the first portion P1 may be a portion of the extraction electrode 50 on the back substrate 80 side.
  • the second portion P2 may be a portion of the extraction electrode 50 on the front substrate 10 side.
  • the first portion P1 and the second portion P2 may be made of the same material or different materials.
  • the first portion P1 may be a metal foil such as copper foil, and the second portion P2 may be made of a conductive polymer. Note that, for example, the portion of the extraction electrode 50 having a first width W1 described later may be the first portion P1.
  • the first extraction electrode 50f includes a first A portion P1f and a second A portion P2f.
  • the first A portion P1f is an example of the first portion P1
  • the second A portion P2f is an example of the second portion P2.
  • the second A portion P2f may be a portion that electrically connects the solar cell unit 2 and the first A portion P1f.
  • the first A portion P1f may be connected to the solar cell unit 2 via the second A portion P2f and the first conductive portion 21f.
  • the first A portion P1f may include a region located between the solar cell unit 2 and the rear surface substrate 80 along the Y direction as the second direction, which is a direction along the second surface F2 and perpendicular to the first direction, and the X direction as the first direction.
  • the first A portion P1f is located between the solar cell unit 2 and the rear surface substrate 80 along the X direction as the first direction and the Y direction as the second direction.
  • the first A portion P1f is located along a virtual or actual plane that is located along both the X direction as the first direction and the Y direction as the second direction.
  • the second extraction electrode 50s includes a first B portion P1s and a second B portion P2s.
  • the first B portion P1s is an example of the first portion P1
  • the second B portion P2s is an example of the second portion P2.
  • the second B portion P2s may be a portion that electrically connects the solar cell unit 2 and the first B portion P1s.
  • the first B portion P1s may be connected to the solar cell unit 2 via the second B portion P2s and the second conductive portion 21s.
  • the first B portion P1s may include a region located along each of the X direction as the first direction and the Y direction as the second direction between the solar cell unit 2 and the rear substrate 80. In the example of FIG.
  • the first B portion P1s is located along each of the X direction as the first direction and the Y direction as the second direction between the solar cell unit 2 and the rear substrate 80.
  • the first B portion P1s is located along a virtual or actual plane that is located along both the X direction as the first direction and the Y direction as the second direction.
  • the portion of the first extraction electrode 50f having a width W1f of 1A described later may be the 1A portion P1f.
  • the width W1f of 1A is an example of the first width W1.
  • the portion of the second extraction electrode 50s having a width W1s of 1B described later may be the 1B portion P1s.
  • the width W1s of 1B is an example of the first width W1.
  • the first portion P1 (more specifically, the 1B portion P1s) of the second extraction electrode 50s may be referred to as the third portion
  • the second portion P2 (more specifically, the 2B portion P2s) of the second extraction electrode 50s may be referred to as the fourth portion.
  • the first width W1 (more specifically, the width W1s of 1B) of the second extraction electrode 50s may be referred to as the third width.
  • the extraction electrode 50 has, for example, a surface (also referred to as the first electrode surface) Fe1 facing the rear substrate 80. More specifically, the first extraction electrode 50f has, for example, a surface (also referred to as the first A electrode surface) Fe1f facing the rear substrate 80. In other words, for example, the first A portion P1f has a surface (first A electrode surface) Fe1f facing the third surface F3 of the rear substrate 80.
  • the first A electrode surface Fe1f may be an example of the first electrode surface Fe1. In the example of FIG. 1, the first A electrode surface Fe1f is a surface of the first A portion P1f that is located along the third surface F3 of the rear substrate 80.
  • the second extraction electrode 50s has, for example, a surface (also referred to as the first B electrode surface) Fe1s facing the rear substrate 80.
  • the 1B portion P1s has a surface (1B electrode surface) Fe1s that faces the third surface F3 of the rear surface base material 80.
  • the 1B electrode surface Fe1s may be an example of the first electrode surface Fe1.
  • the 1B electrode surface Fe1s is a surface of the 1B portion P1s that is located along the third surface F3 of the rear surface base material 80.
  • the first electrode surface Fe1 (more specifically, the 1B electrode surface Fe1s) of the second extraction electrode 50s may be referred to as the third electrode surface.
  • the first electrode surface Fe1 may be the surface closest to the back substrate 80 among the multiple surfaces of the extraction electrode 50. More specifically, for example, the first A electrode surface Fe1f may be the surface closest to the back substrate 80 among the multiple surfaces of the first extraction electrode 50f.
  • the first B electrode surface Fe1s may be the surface closest to the back substrate 80 among the multiple surfaces of the second extraction electrode 50s.
  • the first electrode surface Fe1 may be the surface closest to the back substrate 80 among one or more surfaces parallel or approximately parallel to the third surface F3 of the back substrate 80 among the multiple surfaces of the extraction electrode 50.
  • the first A electrode surface Fe1f may be the surface closest to the back substrate 80 among one or more surfaces parallel or approximately parallel to the third surface F3 of the back substrate 80 among the multiple surfaces of the first extraction electrode 50f.
  • the first B electrode surface Fe1s may be the surface closest to the rear surface substrate 80 among the multiple surfaces of the second extraction electrode 50s, which are one or more surfaces parallel or substantially parallel to the third surface F3 of the rear surface substrate 80.
  • the first electrode surface Fe1 may be, for example, a plane along the X direction as a first direction, and also along the Y direction as a second direction.
  • the first electrode surface Fe1 may be, for example, a plane along a virtual plane parallel to the XY plane.
  • the first electrode surface Fe1 may extend, for example, along both the X direction as a first direction and the Y direction as a second direction perpendicular to the first direction.
  • the direction perpendicular to the first electrode surface Fe1 may be the Z direction as a third direction.
  • the first A electrode surface Fe1f may be, for example, a plane along the X direction as the first direction, and also along the Y direction as the second direction.
  • the first A electrode surface Fe1f may be, for example, a plane along a virtual plane parallel to the XY plane.
  • the first A electrode surface Fe1f may extend, for example, along both the X direction as the first direction and the Y direction as the second direction. From another perspective, for example, the direction perpendicular to the first A electrode surface Fe1f may be the Z direction as the third direction.
  • the first B electrode surface Fe1s may be, for example, a plane along the X direction as the first direction, and also along the Y direction as the second direction.
  • the first B electrode surface Fe1s may be, for example, a plane along an imaginary plane parallel to the XY plane.
  • the first B electrode surface Fe1s may extend, for example, along both the X direction as the first direction and the Y direction as the second direction. From another perspective, for example, the direction perpendicular to the first B electrode surface Fe1s may be the Z direction as the third direction.
  • the extraction electrode 50 has a surface (also referred to as the second electrode surface) Fe2 facing the surface base material 10.
  • the second portion P2 may have a surface (second electrode surface) Fe2 facing the second surface F2 of the surface base material 10.
  • the second A portion P2f has a surface (also referred to as the second A electrode surface) Fe2f facing the second surface F2 of the surface base material 10.
  • the second A electrode surface Fe2f may be an example of the second electrode surface Fe2.
  • the first extraction electrode 50f has a second electrode surface Fe2 (specifically, the second A electrode surface Fe2f) facing the surface base material 10.
  • the second A electrode surface Fe2f is a surface of the second A portion P2f that is located along the second surface F2 of the surface base material 10.
  • the second B portion P2s has a surface (also referred to as the second B electrode surface) Fe2s that faces the second surface F2 of the surface base material 10.
  • the second B electrode surface Fe2s may be an example of the second electrode surface Fe2.
  • the second extraction electrode 50s has a second electrode surface Fe2 (specifically, the second B electrode surface Fe2s) that faces the surface base material 10.
  • the second B electrode surface Fe2s is a surface of the second B portion P2s that is located along the second surface F2 of the surface base material 10.
  • the second electrode surface Fe2 (more specifically, the second B electrode surface Fe2s) in the second extraction electrode 50s may be referred to as the fourth electrode surface.
  • the second electrode surface Fe2 may be the surface closest to the surface substrate 10 among the multiple surfaces of the extraction electrode 50. More specifically, for example, the second A electrode surface Fe2f may be the surface closest to the surface substrate 10 among the multiple surfaces of the first extraction electrode 50f.
  • the second B electrode surface Fe2s may be the surface closest to the surface substrate 10 among the multiple surfaces of the second extraction electrode 50s.
  • the second electrode surface Fe2 may be the surface closest to the surface substrate 10 among one or more surfaces that are parallel or approximately parallel to the second surface F2 of the surface substrate 10 among the multiple surfaces of the extraction electrode 50.
  • the second A electrode surface Fe2f may be the surface closest to the surface substrate 10 among one or more surfaces that are parallel or approximately parallel to the second surface F2 of the surface substrate 10 among the multiple surfaces of the first extraction electrode 50f.
  • the second B electrode surface Fe2s may be the surface closest to the surface base material 10 among the multiple surfaces of the second extraction electrode 50s, which are parallel or approximately parallel to the second surface F2 of the surface base material 10.
  • the first width W1 which is the width of the first electrode surface Fe1 along the X direction as the first direction
  • the second width W2 which is the width of the second electrode surface Fe2 along the X direction as the first direction.
  • the width of the first portion P1 along the X direction as the first direction when the extraction electrode 50 is viewed in plan from the back substrate 80 side may be larger than the width of the second portion P2 along the X direction as the first direction when the extraction electrode 50 is viewed in plan from the front substrate 10 side.
  • the area of the first portion P1 when the extraction electrode 50 is viewed in plan from the back substrate 80 side may be larger than the area of the second portion P2 when the extraction electrode 50 is viewed in plan from the front substrate 10 side.
  • the first width W1 which is the width of the first electrode surface Fe1 in the first extraction electrode 50f along the X direction as the first direction
  • the second width W2 which is the width of the second electrode surface Fe2 in the first extraction electrode 50f along the X direction as the first direction.
  • the first width W1, which is the width of the first portion P1 along the X direction as the first direction when the first extraction electrode 50f is viewed in plan from the back substrate 80 side may be larger than the second width W2, which is the width of the second portion P2 along the X direction as the first direction when the first extraction electrode 50f is viewed in plan from the front substrate 10 side.
  • the first A width W1f which is the width of the first A electrode surface Fe1f in the X direction as the first direction
  • the second A width W2f which is the width of the second A electrode surface Fe2f in the X direction as the first direction.
  • the area of the first A portion P1f when the first extraction electrode 50f is viewed in plan from the back surface base material 80 side may be larger than the area of the second A portion P2f when the first extraction electrode 50f is viewed in plan from the front surface base material 10 side.
  • the area of the first A electrode surface Fe1f when the first extraction electrode 50f is viewed in plan from the back surface base material 80 side may be larger than the area of the second A electrode surface Fe2f when the first extraction electrode 50f is viewed in plan from the front surface base material 10 side.
  • the cross-sectional area of the first extraction electrode 50f in the XZ cross section can be increased without increasing the cross-sectional area of the XY cross section in the portion on the front surface base material 10 side of the first extraction electrode 50f.
  • the XY cross section of a certain portion may be a virtual cross section of a certain portion along a virtual plane (also called a virtual plane) that is along the X direction as the first direction and along the Y direction as the second direction.
  • the XZ cross section of a certain portion may be a virtual cross section of a certain portion along a virtual plane (virtual plane) that is along the X direction as the first direction and along the Z direction as the third direction.
  • the first width W1 which is the width of the first electrode surface Fe1 in the second extraction electrode 50s along the X direction as the first direction
  • the second width W2 which is the width of the second electrode surface Fe2 in the second extraction electrode 50s along the X direction as the first direction.
  • the first width W1, which is the width of the first portion P1 along the X direction as the first direction when the second extraction electrode 50s is viewed in plan from the back substrate 80 side may be larger than the second width W2, which is the width of the second portion P2 along the X direction as the first direction when the second extraction electrode 50s is viewed in plan from the front substrate 10 side.
  • the first B width W1s which is the width of the first B electrode surface Fe1s in the X direction as the first direction
  • the second B width W2s which is the width of the second B electrode surface Fe2s in the X direction as the first direction.
  • the area of the first B portion P1s when the second extraction electrode 50s is viewed in plan from the back surface base material 80 side may be larger than the area of the second B portion P2s when the second extraction electrode 50s is viewed in plan from the front surface base material 10 side.
  • the area of the first B electrode surface Fe1s when the second extraction electrode 50s is viewed in plan from the back surface base material 80 side may be larger than the area of the second B electrode surface Fe2s when the second extraction electrode 50s is viewed in plan from the front surface base material 10 side.
  • the cross-sectional area of the second extraction electrode 50s in the XZ cross section can be increased without increasing the cross-sectional area of the XY cross section in the portion on the front surface base material 10 side of the second extraction electrode 50s.
  • the cross-sectional area of the second extraction electrode 50s in the XZ cross section can be increased without reducing the area in which the multiple power generating units 30 are arranged. As a result, the output of the solar cell module 1 can be improved.
  • the shape of the XZ cross section of the second portion P2 may be rectangular as shown in FIG. 1, or may be a shape in which the width in the X direction as the first direction of the second portion P2 increases as it approaches the first portion P1 as shown in FIGS. 6 to 8.
  • the shape of the XZ cross section of the second portion P2 may be a shape in which the width in the X direction as the first direction increases as it approaches the -Z direction as the 3A direction.
  • FIG. 6 is a cross-sectional view that shows a schematic first example of another virtual cross section of the solar cell module 1 according to the first embodiment.
  • FIG. 7 is a cross-sectional view that shows a schematic second example of another virtual cross section of the solar cell module 1 according to the first embodiment.
  • FIG. 8 is a cross-sectional view that shows a schematic third example of another virtual cross section of the solar cell module 1 according to the first embodiment.
  • the width of the second portion P2 in the XZ cross section may be linearly expanded as it approaches the -Z direction as the 3A direction, as shown in FIG. 6, or may be curvedly expanded as it approaches the -Z direction as the 3A direction, as shown in FIG. 7 or FIG. 8.
  • the second portion P2 may be convex in the X direction as the first direction
  • the width of the second portion P2 in the XZ cross section may be expanded as it approaches the -Z direction as the 3A direction.
  • the second portion P2 may be concave in the X direction as the first direction
  • the width of the second portion P2 in the XZ cross section may be expanded as it approaches the -Z direction as the 3A direction.
  • FIG. 9 is a cross-sectional view showing a schematic example of another example of a virtual cross section at a position corresponding to the cross-sectional view of FIG. 4 of the solar cell module 1 according to the first embodiment.
  • FIG. 10 is a cross-sectional view showing a schematic example of another example of a virtual cross section at a position corresponding to the cross-sectional view of FIG.
  • the first width W1 at the 1A position p1A of the first electrode surface Fe1 of the extraction electrode 50 may be larger than the first width W1 at the 1B position p1B of the first electrode surface Fe1 of the extraction electrode 50.
  • the shape of the first portion P1 of the extraction electrode 50 may be, for example, triangular or trapezoidal. If this configuration is adopted, the density of the current flowing toward the connection portion PC in the first portion P1 of the extraction electrode 50 can be reduced from increasing as it approaches the connection portion PC. This reduces heat generation in the first portion P1, and the durability of the extraction electrode 50 can be improved.
  • the width of the 1A portion P1f in the X direction as the first direction may increase as it approaches the first connection portion PCf.
  • the width of the 1A electrode surface Fe1f of the 1A portion P1f in the X direction as the first direction may increase as it approaches the first connection portion PCf.
  • the 1A electrode surface Fe1f of the first extraction electrode 50f has a width W1fa of the 1Aa, which is the width W1f of the 1A at the 1A position p1A in the Y direction as the second direction, and a width W1fb of the 1Ab, which is the width W1f of the 1A at the 1B position p1B, which is a position farther from the first connection portion PCf than the 1A position p1A in the Y direction as the second direction.
  • the width W1fa of the first Aa may be greater than the width W1fb of the first Ab.
  • the increase in the density of the current (current density) flowing toward the first connection part PCf in the first A part P1f of the first extraction electrode 50f as it approaches the first connection part PCf can be reduced. This reduces heat generation in the first A part P1f and improves the durability of the first extraction electrode 50f.
  • the width of the first B portion P1s in the X direction as the first direction may increase as it approaches the second connection portion PCs.
  • the width of the first B electrode surface Fe1s of the first B portion P1s in the X direction as the first direction may increase as it approaches the second connection portion PCs.
  • the first B electrode surface Fe1s of the second extraction electrode 50s has a width W1sa of the first Ba, which is the width W1s of the first B at the first A position p1A in the Y direction as the second direction, and has a width W1sb of the first Bb, which is the width W1s of the first B at the first B position p1B, which is a position farther from the second connection portion PCs than the first A position p1A in the Y direction as the second direction.
  • the width W1sa of the first Ba may be greater than the width W1sb of the first Bb.
  • the increase in the density of the current (current density) flowing toward the second connection part PCs in the first B part P1s of the second extraction electrode 50s as it approaches the second connection part PCs can be reduced. This reduces heat generation in the first B part P1s and improves the durability of the second extraction electrode 50s.
  • the first width W1 of the first portion P1 may be larger than the width of each of the multiple power generating units 30 in the X direction as the first direction.
  • the first width W1 of the extraction electrode 50 may be larger than the width of one power generating unit 30 in the X direction as the first direction.
  • the width W1f of the first A which is the width of the first A electrode surface Fe1f in the X direction as the first direction, may be larger than the width of each of the multiple power generating units 30 in the X direction as the first direction.
  • the width W1s of the first B which is the width of the first B electrode surface Fe1s in the X direction as the first direction, may be larger than the width of each of the multiple power generating units 30 in the X direction as the first direction. If this configuration is adopted, the width of the extraction electrode 50 can be expanded without reducing the number of power generating units 30 in the solar cell module 1. This can reduce the resistance loss in the extraction electrode 50. As a result, the output of the solar cell module 1 can be improved.
  • the width W1fa of the first Aa in the first extraction electrode 50f is greater than the width in the X direction as the first direction of the power generating unit 30
  • the width W1fb of the first Ab in the first extraction electrode 50f may be smaller than the width in the X direction as the first direction of the power generating unit 30.
  • the width W1sa of the first Ba in the second extraction electrode 50s is greater than the width in the X direction as the first direction of the power generating unit 30
  • the width W1sb of the first Bb in the second extraction electrode 50s may be smaller than the width in the X direction as the first direction of the power generating unit 30.
  • the position of the first portion P1 of the first extraction electrode 50f and the position of the first portion P1 of the second extraction electrode 50s may coincide. More specifically, for example, in the Z direction as the third direction, which is perpendicular to each of the first and second directions, the position of the first A portion P1f of the first extraction electrode 50f and the position of the first B portion P1s of the second extraction electrode 50s may coincide.
  • the position of the first edge, which is one side on the back substrate 80 side of the first portion P1 of the first extraction electrode 50f, and the position of the second edge, which is one side on the back substrate 80 side of the first portion P1 of the second extraction electrode 50s may coincide.
  • the position of the first side, which is one side of the 1A electrode surface Fe1f in the 1A portion P1f of the first extraction electrode 50f, and the position of the second side, which is a side of the 1B electrode surface Fe1s in the 1B portion P1s of the second extraction electrode 50s may be the same.
  • the distance from the surface base material 10 to the first side and the distance from the surface base material 10 to the second side may be the same. If this configuration is adopted, the thickness of the solar cell module 1 can be thinner than when the position of the first portion P1 of the first extraction electrode 50f and the position of the first portion P1 of the second extraction electrode 50s are different in the Z direction as the third direction.
  • the position of the first portion P1 of the first extraction electrode 50f and the position of the first portion P1 of the second extraction electrode 50s coincide in the Z direction as the third direction by allowing deviations due to various errors such as processing errors that occur during the manufacture of the solar cell module 1
  • the position of the first portion P1 of the first extraction electrode 50f and the position of the first portion P1 of the second extraction electrode 50s may also be included in the case where the position of the first portion P1 of the first extraction electrode 50f and the position of the first portion P1 of the second extraction electrode 50s approximately coincide in the Z direction as the third direction.
  • FIG. 11 is a diagram showing another fourth example of a virtual cross section of the solar cell module 1 according to the first embodiment. More specifically, for example, in the Z direction as the third direction that is perpendicular to each of the first and second directions, the position of the 1A portion P1f of the first extraction electrode 50f and the position of the 1B portion P1s of the second extraction electrode 50s may be different.
  • the position of the first side, which is one side on the back substrate 80 side of the first portion P1 of the first extraction electrode 50f, and the position of the second side, which is one side on the back substrate 80 side of the first portion P1 of the second extraction electrode 50s may be different.
  • the position of the first side, which is one side of the 1A electrode surface Fe1f in the 1A portion P1f of the first extraction electrode 50f, and the position of the second side, which is one side of the 1B electrode surface Fe1s in the 1B portion P1s of the second extraction electrode 50s may be different.
  • the distance from the surface base material 10 to the first side and the distance from the surface base material 10 to the second side may be different. If this configuration is adopted, the first portion P1 (more specifically, the 1A portion P1f) of the first extraction electrode 50f and the first portion P1 (more specifically, the 1B portion P1s) of the second extraction electrode 50s can be set in a state where they do not interfere with each other.
  • the first width W1 (more specifically, the 1A width W1f) of the first portion P1 (more specifically, the 1A portion P1f) of the first extraction electrode 50f and/or the first width W1 (more specifically, the 1B width W1s) of the first portion P1 (more specifically, the 1B portion P1s) of the second extraction electrode 50s can be enlarged. This can increase the cross-sectional area of the first extraction electrode 50f and/or the second extraction electrode 50s in the XZ cross section. As a result, the output of the solar cell module 1 can be improved.
  • Fig. 12 is a flow chart showing an example of the flow of the manufacturing process of the manufacturing method of the solar cell module 1 according to the first embodiment.
  • the solar cell module 1 can be manufactured by performing seven steps from step S1 to step S7 in the order described.
  • An example of the flow of the manufacturing process in Fig. 12 will be described below.
  • the conductive portion 21 is made of the same material as the transparent electrode 20, and a part of the transparent electrode 20 functions as the conductive portion 21.
  • the conductive portion 21 is formed by forming the transparent electrode 20.
  • a transparent electrode 20 is formed on the surface substrate 10.
  • the transparent electrode 20 is formed, for example, by a vacuum process such as sputtering on the plate-shaped or sheet-shaped surface substrate 10.
  • the transparent electrode 20 may be separated, for example, by laser irradiation or scribing, to form a plurality of transparent electrodes 20 on the surface substrate 10, as in the example of FIG. 1.
  • the plurality of transparent electrodes 20 may include, for example, transparent electrodes 20 including a portion that functions as a conductive portion 21, or may include transparent electrodes 20 that have the function as a conductive portion 21.
  • the power generation section 30 is formed on the surface substrate 10 and the transparent electrode 20.
  • the power generation section 30 can be formed by forming the first carrier transport section 31, the photoelectric conversion section 32, and the second carrier transport section 33 in the order described above on the surface substrate 10 on which the transparent electrode 20 has been formed.
  • a plurality of power generation sections 30 may be formed on the surface substrate 10 and the plurality of transparent electrodes 20 by separating the power generation section 30 by scribing or the like.
  • a back electrode 40 is formed on the power generation unit 30 and the transparent electrode 20.
  • the back electrode 40 can be formed by a vacuum process such as sputtering on the transparent electrode 20 and power generation unit 30 formed on the surface substrate 10.
  • multiple back electrodes 40 can be formed on multiple power generation units 30 and multiple transparent electrodes 20 by separating the back electrode 40 and the power generation unit 30 by scribing, as in the example of FIG. 1.
  • the second portion P2 of the extraction electrode 50 is formed on the transparent electrode 20. More specifically, for example, the second A portion P2f of the first extraction electrode 50f is formed on the transparent electrode 20, and the second B portion P2s of the second extraction electrode 50s is formed on the transparent electrode 20.
  • the second portion P2 can be formed by applying a conductive paste or a conductive ink by inkjet printing or screen printing on the transparent electrode 20 formed on the surface substrate 10, and then drying the applied conductive paste or conductive ink.
  • the second portion P2 may be formed by applying and solidifying a low-melting-point alloy such as solder in a molten state on the transparent electrode 20 formed on the surface substrate 10 in the order described above, or by arranging, melting, and solidifying a low-melting-point alloy such as solder in the order described above.
  • the second portion P2 may be formed by attaching a conductive tape (also called a conductive tape) on the transparent electrode 20 formed on the surface substrate 10.
  • step S5 for example, a sheet that is the base material for the filler 60 is placed on the transparent electrode 20, the power generation unit 30, and the back electrode 40 formed on the surface substrate 10, as well as on the surface substrate 10.
  • the sheet may be, for example, a resin sheet.
  • the resin sheet may be, for example, a resin sheet before cross-linking.
  • step S6 for example, the first portion P1 of the extraction electrode 50 is formed and the back substrate 80 is placed.
  • the back substrate 80 having a portion corresponding to the first portion P1 of the extraction electrode 50 formed on the surface is placed on the transparent electrode 20, the power generation unit 30, and the back electrode 40 formed on the front substrate 10, and the sheet and second portion P2 that are the base material of the filler 60 placed on the front substrate 10.
  • the first portion P1 and the second portion P2 may be joined by thermal welding or thermocompression bonding, or the first portion P1 and the second portion P2 may be joined by heating in the lamination process of step S7 by thermal welding or thermocompression bonding.
  • the first A portion P1f of the first extraction electrode 50f is formed on the second A portion P2f of the first extraction electrode 50f
  • the first B portion P1s of the second extraction electrode 50s is formed on the second B portion P2s of the second extraction electrode 50s.
  • a portion corresponding to the first portion P1 can be formed on the surface of the back substrate 80 by vapor deposition or sputtering of a metal material or the like, or by applying and drying a metal paste, and by joining a metal foil corresponding to the connection portion PC with solder or the like.
  • the portion corresponding to the 1B portion P1s can be formed, for example, by arranging a film on which a metal foil or metal film is formed and heat welding to the 2B portion P2s.
  • a sheet that is the base of the filler 60 may be placed on the portion corresponding to the 1B portion P1s, and then the back substrate 80 on which a portion corresponding to the 1A portion P1f of the extraction electrode 50 is formed on the surface may be placed.
  • step S7 for example, a laminator is used in a lamination process to fill the gap in the internal space IS between the front substrate 10 and the back substrate 80 with the filler 60.
  • the sheet that is the base of the filler 60 is softened by heating, and the filler 60 fills the gap in the internal space IS between the front substrate 10 and the back substrate 80.
  • cross-linking of the resin that constitutes the sheet may be performed.
  • reflective material 70 may be formed or installed.
  • a back surface mirror or a front surface mirror corresponding to reflective material 70 may be arranged.
  • a metal film corresponding to reflective material 70 may be formed in advance by sputtering or the like on a portion corresponding to first portion P1 on back surface substrate 80.
  • a metal film corresponding to reflective material 70 may be formed in advance by sputtering or the like on a film on which a metal foil or metal film has been formed as a portion corresponding to first B portion P1s.
  • Fig. 13 is a cross-sectional view that shows a schematic example of a virtual cross section of the solar cell module 1A according to the second embodiment.
  • the solar cell module 1A according to the second embodiment has a configuration in which the structure of the extraction electrode 50 is changed based on the solar cell module 1 according to the first embodiment. More specifically, as shown in FIG. 13, in the solar cell module 1A according to the second embodiment, the first portion P1 is in contact with the side of the second portion P2 in the extraction electrode 50.
  • the first portion P1 being in contact with the side of the second portion P2 may mean, for example, that the first portion P1 is in contact with the second portion P2 in the X direction as the first direction.
  • the first A portion P1f of the first extraction electrode 50f is in contact with the side of the second A portion P2f of the first extraction electrode 50f.
  • the first B portion P1s of the second extraction electrode 50s is in contact with the side of the second B portion P2s of the second extraction electrode 50s.
  • the first A portion P1f being in contact with the side of the second A portion P2f may mean, for example, that the first A portion P1f is in contact with the second A portion P2f in the X direction as the first direction.
  • the first B portion P1s being in contact with the side of the second B portion P2s may mean, for example, that the first B portion P1s is in contact with the second B portion P2s in the X direction as the first direction.
  • the first A portion P1f is in contact with the second A portion P2f in the +X direction as the first A direction
  • the first B portion P1s is in contact with the second B portion P2s in the -X direction as the first B direction.
  • the second portion P2 may be in contact with the side of the first portion P1.
  • the second A portion P2f may be in contact with the side of the first A portion P1f
  • the second B portion P2s may be in contact with the side of the first B portion P1s.
  • the second A portion P2f is in contact with the first A portion P1f in the -X direction as the first B direction
  • the second B portion P2s is in contact with the first B portion P1s in the +X direction as the first A direction.
  • the first portion P1 and the second portion P2 may not only be in contact with each other, but may also be joined by thermal welding or the like.
  • the second portion P2 may be in contact with the side of the conductive portion 21. More specifically, for example, the second A portion P2f may be in contact with the side of the first conductive portion 21f, and the second B portion P2s may be in contact with the side of the second conductive portion 21s.
  • the second A portion P2f being in contact with the side of the first conductive portion 21f may mean, for example, that the second A portion P2f is in contact with the first conductive portion 21f in the X direction as the first direction.
  • the second B portion P2s being in contact with the side of the second conductive portion 21s may mean, for example, that the second B portion P2s is in contact with the second conductive portion 21s in the X direction as the first direction.
  • the second A portion P2f contacts the first conductive portion 21f in the -X direction as the first B direction
  • the second B portion P2s contacts the second conductive portion 21s in the +X direction as the first A direction. If this configuration is adopted, the second portion P2 is located from the second surface F2 of the front substrate 10 to the third surface F3 of the back substrate 80, so that the intrusion of moisture from the end of the solar cell module 1A in the X direction as the first direction toward the solar cell portion 2 can be reduced.
  • the second part P2 may be in contact with the first part P1 from the side, and may also be in contact with the first part P1 from the +Z direction side as the 3A direction. If this configuration is adopted, the area of the region where the second part P2 and the first part P1 are in contact (also called the contact area) increases, and the contact resistance between the second part P2 and the first part P1 can be reduced. More specifically, for example, the second part P2f may be in contact with the first part P1f from the side, and may also be in contact with the first part P1f from the +Z direction side as the 3A direction.
  • the second part P2s may be in contact with the first part P1s from the side, and may also be in contact with the first part P1s from the +Z direction side as the 3A direction. Furthermore, for example, the second part P2 may be in contact with the conductive part 21 from the side, and may also be in contact with the conductive part 21 from the -Z direction side as the 3B direction. If this configuration is adopted, the area (contact area) of the region where the second portion P2 and the conductive portion 21 are in contact with each other is increased, and the contact resistance between the second portion P2 and the conductive portion 21 can be reduced.
  • the second A portion P2f may be in contact with the side of the first conductive portion 21f and also in contact with the first conductive portion 21f from the -Z direction side as the third B direction.
  • the second B portion P2s may be in contact with the side of the second conductive portion 21s and also in contact with the second conductive portion 21s from the -Z direction side as the third B direction.
  • the second portion P2 and the conductive portion 21 may not only be in contact with each other, but may also be joined by thermal welding or the like.
  • the second portion P2 may not be formed in step S4.
  • the second portion P2 may be formed by pouring metal paste or molten solder into the gap (internal space) IS between the front substrate 10 and the rear substrate 80 from both ends in the X direction as the first direction of the gap (internal space) IS.
  • a sheet that is the base of the filler 60 may be placed at both ends in the X direction as the first direction of the gap (internal space) IS between the front substrate 10 and the rear substrate 80.
  • a sheet that is the base of the filler 60 may not be placed at both ends in the X direction as the first direction of the gap (internal space) IS between the front substrate 10 and the rear substrate 80.
  • resin may be filled into both ends of the gap (internal space) IS between the front substrate 10 and the back substrate 80 in the X direction, which is the first direction.
  • Fig. 14 is a cross-sectional view that shows a schematic example of a virtual cross section of the solar cell module 1B according to the third embodiment.
  • the solar cell module 1B according to the third embodiment has a configuration in which the structure of the extraction electrode 50 is changed based on the solar cell module 1 according to the first embodiment. More specifically, as shown in FIG. 14, in the solar cell module 1B according to the third embodiment, the extraction electrode 50 further includes an intermediate portion P3 located between the first portion P1 and the second portion P2. Even in this case, the second portion P2 electrically connects the solar cell unit 2 and the first portion P1.
  • the first extraction electrode 50f may further include a first intermediate portion P3f located between the first A portion P1f and the second A portion P2f. Even in this case, the second A portion P2f electrically connects the solar cell unit 2 and the first A portion P1f.
  • the second extraction electrode 50s may further include a second intermediate portion P3s located between the first B portion P1s and the second B portion P2s. Even in this case, the second B portion P2s electrically connects the solar cell unit 2 and the first B portion P1s.
  • the material of the middle portion P3 may be the same as or different from the material of the first portion P1 and/or the material of the second portion P2.
  • the width of the intermediate portion P3 along the Y direction as the second direction may be the same as the width of the first portion P1 along the Y direction as the second direction, or it may be greater than the width of the first portion P1 along the Y direction as the second direction, or it may be smaller than the width of the first portion P1 along the Y direction as the second direction. If this configuration is adopted, the degree of freedom in designing the extraction electrode 50 can be increased when the material of the first portion P1 and the material of the second portion P2 are different.
  • the intermediate portion P3 may be formed after the second portion P2 is formed.
  • a conductive paste or a conductive ink may be applied on the second portion P2 by inkjet printing or screen printing, and the applied conductive paste or conductive ink may be dried to form the intermediate portion P3.
  • a low melting point alloy such as solder in a molten state may be applied and solidified on the second portion P2 in the order described above, or a low melting point alloy such as solder may be placed, melted, and solidified in the order described above to form the intermediate portion P3.
  • a conductive tape also called a conductive tape
  • the intermediate portion P3 may be attached on the second portion P2 to form the intermediate portion P3.
  • Fig. 15 is a cross-sectional view that illustrates a schematic example of a virtual cross section of the solar cell module 1C according to the fourth embodiment.
  • the solar cell module 1C according to the fourth embodiment has a configuration in which the structure of the filler 60 is changed based on the solar cell module 1 according to the first embodiment. More specifically, as shown in FIG. 15, the filler 60 is also located between the first portion P1 of the extraction electrode 50 and the back substrate 80. For example, the filler 60 may also be located between the first A portion P1f of the first extraction electrode 50f and the back substrate 80. For example, the filler 60 may also be located between the first B portion P1s of the second extraction electrode 50s and the back substrate 80.
  • the portion located between the first portion P1 of the extraction electrode 50 and the back substrate 80 and the portion located between the first portion P1 of the extraction electrode 50 and the front substrate 10 may be connected or separated.
  • the extraction electrode 50 and the back substrate 80 are not in direct contact. If this configuration is adopted, even if stress occurs between the first portion P1 of the extraction electrode 50 and the back surface substrate 80 due to, for example, a difference in thermal expansion coefficient between the extraction electrode 50 and the back surface substrate 80, the stress can be alleviated by the filler 60 present between the first portion P1 of the extraction electrode 50 and the back surface substrate 80. This can reduce the occurrence of cracks in the first portion P1 of the extraction electrode 50.
  • the first A portion P1f of the first extraction electrode 50f does not need to be in direct contact with the back surface substrate 80. If this configuration is adopted, even if stress occurs between the first A portion P1f of the first extraction electrode 50f and the back surface substrate 80 due to, for example, a difference in thermal expansion coefficient between the first extraction electrode 50f and the back surface substrate 80, the stress can be alleviated by the filler 60 present between the first A portion P1f and the back surface substrate 80.
  • the first B portion P1s of the second extraction electrode 50s does not need to be in direct contact with the back surface substrate 80.
  • the solar cell module of the present disclosure has been described with various drawings and embodiments, but a person skilled in the art can make various modifications and corrections based on the various embodiments described above. Therefore, various forms realized by modifications and corrections based on these various embodiments are included in the scope of the solar cell module of the present disclosure.
  • the various functional units may be rearranged within a logically consistent range, a plurality of functional units may be combined into one functional unit, or one or more of the multiple functional units may be further divided into multiple functional units.
  • the various embodiments described above are not limited to configurations in which the specific various embodiments described respectively are faithfully implemented, and may be implemented by combining the features of the various embodiments or omitting some of the various embodiments as appropriate.
  • the description of the various embodiments of the present disclosure described above is illustrative in all aspects, and this disclosure is not limited to the description described above.
  • the various examples described above may be combined and applied as long as they are not mutually contradictory. And countless examples not exemplified can be imagined without departing from the scope of the present disclosure.
  • a solar cell module includes a front substrate, a back substrate, a plurality of power generating units, and a first extraction electrode that extracts electricity generated by the plurality of power generating units to the outside of the solar cell module.
  • the plurality of power generating units and the first extraction electrode are located between the front substrate and the back substrate.
  • the first extraction electrode has a first electrode surface facing the back substrate and a second electrode surface facing the front substrate.
  • a first width which is the width of the first electrode surface along a first direction in which the plurality of power generating units are arranged, is larger than a second width, which is the width of the second electrode surface along the first direction.
  • the first extraction electrode has a connection portion that connects to a conductor that connects to the outside of the solar cell module.
  • the first extraction electrode has a first A position that is a position above the first extraction electrode in a second direction that is a direction perpendicular to the first direction on the first electrode surface, and a first B position that is a position above the first extraction electrode and farther from the connection portion than the first A position.
  • the first width at the first A position which is the width of the first A, is larger than the first width at the first B position, which is the width of the first B.
  • the first width is greater than the width of each of the plurality of power generating units.
  • any of the solar cell modules (1) to (3) above further includes a reflective material capable of reflecting light.
  • the reflective material is located between the back substrate and the multiple power generating units in a third direction that is perpendicular to the first electrode surface.
  • any of the solar cell modules (1) to (4) above further includes a second extraction electrode that is an electrode for extracting electricity generated in the multiple power generation units to the outside of the solar cell module and corresponds to a polarity different from that of the first extraction electrode.
  • the first extraction electrode has a first portion that is a portion having the first width.
  • the second extraction electrode has a third electrode surface facing the back substrate, and has a third portion that is a portion having a third width that is the width of the third surface along the first direction. The position of the first portion in the third direction that is perpendicular to the first electrode surface and the position of the third portion in the third direction coincide with each other.
  • any of the solar cell modules (1) to (4) above further includes a second extraction electrode that is an electrode for extracting electricity generated in the multiple power generation units to the outside of the solar cell module and corresponds to a polarity different from that of the first extraction electrode.
  • the first extraction electrode has a first portion that is a portion having the first width.
  • the second extraction electrode has a third electrode surface facing the back substrate, and has a third portion that is a portion having a third width that is the width of the third surface along the first direction. The position of the first portion in the third direction that is perpendicular to the first electrode surface is different from the position of the third portion in the third direction.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Photovoltaic Devices (AREA)

Abstract

Ce module de cellule solaire (1) comprend : un substrat avant (10) possédant une première surface (F1) et une deuxième surface (F2) ; un substrat arrière (80) possédant une troisième surface (F3) qui fait face à la deuxième surface (F2) et possédant une quatrième surface (F4) ; une partie cellule solaire (2) comprenant une pluralité de parties de génération d'énergie (30) qui sont agencées dans une première direction suivant la deuxième surface (F2) et qui génèrent de l'énergie en réponse à l'incidence de la lumière ; et une première électrode d'extraction (50f) pour extraire de l'électricité générée dans la pluralité de parties de génération d'énergie (30) vers l'extérieur du module de cellule solaire (1). La première électrode d'extraction (50f) comprend une première partie A (P1f) comprenant une première partie de connexion (PCf) exposée sur l'extérieur du module de cellule solaire (1) et possédant un fil conducteur connecté à celle-ci, et une seconde partie A (P2f) qui connecte électriquement la partie cellule solaire (2) et la première partie A (P1f). La partie cellule solaire (2) et une partie de la première électrode d'extraction (50f) autre que la première partie de connexion (PCf) sont positionnées entre le substrat avant (10) et le substrat arrière (80). La première partie A (P1f) comprend une région positionnée entre la partie cellule solaire (2) et le substrat arrière (80) dans la première direction qui suit la deuxième surface (F2) et une seconde direction. Dans la première direction, la largeur d'une première surface d'électrode A (Fe1f) de la première partie A (P1f) et faisant face à la troisième surface (F3) est supérieure à la largeur d'une seconde surface d'électrode A (Fe2f) de la seconde partie A et faisant face à la deuxième surface.
PCT/JP2024/018308 2023-05-17 2024-05-17 Module de cellule solaire Pending WO2024237334A1 (fr)

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Citations (8)

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JP2010074042A (ja) * 2008-09-22 2010-04-02 Sharp Corp 太陽電池モジュールおよび太陽電池モジュールの製造方法
JP2010278148A (ja) * 2009-05-27 2010-12-09 Mitsubishi Electric Corp 光起電力装置およびその製造方法
JP2011029382A (ja) * 2009-07-24 2011-02-10 Sanyo Electric Co Ltd 薄膜太陽電池モジュール
WO2011070951A1 (fr) * 2009-12-11 2011-06-16 コニカミノルタホールディングス株式会社 Panneau d'électronique organique et procédé de fabrication associé
WO2012017742A1 (fr) * 2010-08-06 2012-02-09 三菱電機株式会社 Pile solaire à couche mince et son procédé de production
JP2015090935A (ja) * 2013-11-06 2015-05-11 三菱化学株式会社 薄膜太陽電池モジュール及び薄膜太陽電池アレイ
JP2015167151A (ja) * 2012-06-29 2015-09-24 三菱化学株式会社 太陽電池モジュール
WO2018025823A1 (fr) * 2016-08-02 2018-02-08 日本ゼオン株式会社 Module de cellule solaire

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010074042A (ja) * 2008-09-22 2010-04-02 Sharp Corp 太陽電池モジュールおよび太陽電池モジュールの製造方法
JP2010278148A (ja) * 2009-05-27 2010-12-09 Mitsubishi Electric Corp 光起電力装置およびその製造方法
JP2011029382A (ja) * 2009-07-24 2011-02-10 Sanyo Electric Co Ltd 薄膜太陽電池モジュール
WO2011070951A1 (fr) * 2009-12-11 2011-06-16 コニカミノルタホールディングス株式会社 Panneau d'électronique organique et procédé de fabrication associé
WO2012017742A1 (fr) * 2010-08-06 2012-02-09 三菱電機株式会社 Pile solaire à couche mince et son procédé de production
JP2015167151A (ja) * 2012-06-29 2015-09-24 三菱化学株式会社 太陽電池モジュール
JP2015090935A (ja) * 2013-11-06 2015-05-11 三菱化学株式会社 薄膜太陽電池モジュール及び薄膜太陽電池アレイ
WO2018025823A1 (fr) * 2016-08-02 2018-02-08 日本ゼオン株式会社 Module de cellule solaire

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