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WO2023037885A1 - Dispositif de batterie solaire et module de batterie solaire - Google Patents

Dispositif de batterie solaire et module de batterie solaire Download PDF

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Publication number
WO2023037885A1
WO2023037885A1 PCT/JP2022/032049 JP2022032049W WO2023037885A1 WO 2023037885 A1 WO2023037885 A1 WO 2023037885A1 JP 2022032049 W JP2022032049 W JP 2022032049W WO 2023037885 A1 WO2023037885 A1 WO 2023037885A1
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WO
WIPO (PCT)
Prior art keywords
solar cell
light
adhesive member
back side
side adhesive
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.)
Ceased
Application number
PCT/JP2022/032049
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English (en)
Japanese (ja)
Inventor
広平 小島
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Kaneka Corp
Original Assignee
Kaneka Corp
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Publication date
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Priority to CN202280061666.0A priority Critical patent/CN117957933A/zh
Priority to JP2023546876A priority patent/JPWO2023037885A1/ja
Publication of WO2023037885A1 publication Critical patent/WO2023037885A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H10K30/50—Photovoltaic [PV] devices
    • H10K30/57—Photovoltaic [PV] devices comprising multiple junctions, e.g. tandem PV cells
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to solar cell devices and solar cell modules.
  • Solar cell devices in which a plurality of solar cells are connected by connecting members such as tabs, and solar cell modules in which the solar cell devices are sealed with a protective member such as glass or transparent resin and a sealing material are known.
  • a protective member such as glass or transparent resin and a sealing material
  • solar cells crystalline silicon solar cells using a crystalline silicon substrate as a photoelectric conversion layer and thin film solar cells using an inorganic thin film such as an amorphous silicon thin film as a photoelectric conversion layer are known.
  • a thin-film solar cell a perovskite thin-film solar cell using a perovskite thin film that is an organic thin film (more specifically, an organic/inorganic hybrid thin film) as a photoelectric conversion layer is known.
  • Patent Document 1 discloses a tandem solar cell including a bottom cell (first photoelectric conversion unit) including a crystalline silicon substrate as a photoelectric conversion layer and a top cell (second photoelectric conversion unit) including a perovskite thin film as a photoelectric conversion layer.
  • first photoelectric conversion unit including a crystalline silicon substrate as a photoelectric conversion layer
  • second photoelectric conversion unit including a perovskite thin film as a photoelectric conversion layer.
  • a battery cell is disclosed.
  • tandem solar cells include a two-terminal type in which a top cell and a bottom cell are connected in series, and a four-terminal type in which electricity is extracted separately from the top and bottom cells.
  • a three-terminal tandem solar cell has been devised that can utilize the advantages of these two-terminal and four-terminal types and has the possibility of further improving the photoelectric conversion efficiency (see, for example, Patent Document 2). ).
  • an amorphous silicon thin film as a photoelectric conversion layer and a conductive amorphous silicon thin film are formed on relatively hard glass or transparent resin.
  • a conductive amorphous silicon thin film is formed on a crystalline silicon substrate as a photoelectric conversion layer without using glass or transparent resin. Therefore, in a tandem solar cell in which a relatively thick perovskite thin film is formed on the light-receiving surface side of a crystalline silicon substrate, the thickness of the layers stacked on the light-receiving surface side of the crystalline silicon substrate and the thickness of the layers stacked on the back surface side of the crystalline silicon substrate are different. Due to the difference in the thickness of the layers, a relatively large amount of warping of the solar cell occurs in the manufacturing process of the solar cell device. As a result, a relatively large amount of warpage occurs in the solar cell device.
  • connection failure such as peeling of connection members such as tabs, cracking of the solar cell, and the like occur, resulting in a decrease in yield.
  • An object of the present invention is to provide a solar cell device and a solar cell module that reduce the warpage of the solar cell device caused by the warpage of the solar cells.
  • a solar cell device includes: a plurality of double-sided electrode type solar cells; a plurality of connection members electrically connecting the adjacent solar cells; a plurality of light-receiving side adhesive members for bonding the solar cells and the connecting members; and a plurality of back side adhesive members arranged on the back side of the solar cells for bonding the solar cells and the connecting members.
  • the solar cell is of a tandem type including a first photoelectric conversion section including a crystalline silicon substrate and a second photoelectric conversion section disposed closer to the light receiving surface than the first photoelectric conversion section and including a perovskite thin film. A solar cell.
  • the light-receiving-side adhesive member is a sheet-like or film-like resin member that covers the connection member on the light-receiving surface side of the solar cell
  • the back-side adhesive member is a resin member that covers the connection member on the back surface side of the solar cell. It is a sheet-like or film-like resin member that covers the member, and the volume of the back side adhesive member is larger than the volume of the light receiving side adhesive member.
  • a solar cell module comprises one or more of the above solar cell devices, a light-receiving side protective member that protects the light-receiving surface side of the solar cell device, and a back side protective member that protects the back side of the solar cell device. and a sealing material disposed between the solar cell device and the light-receiving side protective member and between the solar cell device and the back side protective member to seal the solar cell device.
  • the present invention in a solar cell device and a solar cell module, it is possible to reduce the warpage of the solar cell device caused by the warpage of the solar cells.
  • FIG. 1 is a cross-sectional view of a solar cell device according to this embodiment
  • FIG. FIG. 3 is a view of a portion of the solar cell device shown in FIG. 2 as viewed from the light receiving surface side
  • FIG. 3 is a view of part of the solar cell device shown in FIG. 2 as seen from the back side
  • 1 is a cross-sectional view of a solar cell module according to this embodiment
  • FIG. It is a cross-sectional view of a solar cell device according to a modification of the present embodiment. It is a cross-sectional view of a solar cell device according to a modification of the present embodiment.
  • FIG. 1 is a cross-sectional view schematically showing a solar cell according to this embodiment.
  • An XY orthogonal coordinate system is shown in FIG. 1 and the drawings described later.
  • the XY plane is a plane along the light-receiving surface and back surface of the solar cell and the solar cell device and solar cell module described later.
  • the solar cell 2 shown in FIG. 1 includes a first photoelectric conversion unit 10 (also referred to as a bottom cell B) and a second photoelectric conversion unit 20 (also referred to as a top cell T) stacked on the light receiving surface side of the first photoelectric conversion unit 10. ) and is a tandem type (multi-junction type) two-terminal type solar cell.
  • the first photoelectric conversion section 10 (bottom cell B) includes a first semiconductor layer as the photoelectric conversion layer 11 .
  • the first semiconductor layer absorbs light and generates photocarriers.
  • the first semiconductor layer as the photoelectric conversion layer 11 is a crystalline silicon substrate such as monocrystalline silicon or polycrystalline silicon.
  • the first semiconductor layer as the photoelectric conversion layer 11 is a single crystal silicon substrate, as the first photoelectric conversion section 10, a diffusion layer of the second conductivity type is provided on the light receiving surface side of the single crystal silicon substrate of the first conductivity type. and a heterojunction cell in which silicon-based thin films are provided on both sides of a first-conductivity-type single-crystal silicon substrate.
  • the first photoelectric conversion unit 10 receives light from the photoelectric conversion layer 11. It has a conductive silicon-based thin film 14 formed on the surface side and a conductive silicon-based thin film 15 formed on the back surface side of the photoelectric conversion layer 11 .
  • the single crystal silicon substrate may be either p-type or n-type.
  • Conductive silicon thin films 14 and 15 are p-type silicon thin films or n-type silicon thin films.
  • intrinsic silicon thin films 12 and 13 are provided between the single crystal silicon substrate as the photoelectric conversion layer 11 and the conductive silicon thin films 14 and 15 .
  • the intrinsic silicon-based thin film on the surface of the single-crystal silicon substrate, it is possible to effectively perform surface passivation while suppressing diffusion of impurities into the single-crystal silicon substrate.
  • the intrinsic amorphous silicon thin film as the intrinsic silicon thin films 12 and 13 on the surface of the single crystal silicon substrate By providing the intrinsic amorphous silicon thin film as the intrinsic silicon thin films 12 and 13 on the surface of the single crystal silicon substrate, a high passivation effect for the surface of the single crystal silicon substrate can be obtained.
  • the second photoelectric conversion unit 20 (top cell T) includes a thin second semiconductor layer as the photoelectric conversion layer 21 .
  • the second semiconductor layer absorbs light and generates photocarriers.
  • the second semiconductor layer has a bandgap different from that of the first semiconductor layer described above. Therefore, the first semiconductor layer and the second semiconductor layer described above have spectral sensitivity characteristics in different wavelength ranges. Therefore, in the stacked photoelectric conversion unit in which the first photoelectric conversion unit 10 including the first semiconductor layer as the photoelectric conversion layer 11 and the second photoelectric conversion unit 20 including the second semiconductor layer as the photoelectric conversion layer 21 are stacked, the Light with a wide wavelength can contribute to photoelectric conversion.
  • the thin film that constitutes the second semiconductor layer includes an organic semiconductor thin film, more specifically an organic-inorganic hybrid semiconductor thin film.
  • the organic-inorganic hybrid semiconductor thin film includes a perovskite thin film containing a photosensitive material having a perovskite crystal structure.
  • a compound constituting a perovskite crystal material is represented by the general formula R 1 NH 3 M 1 X 3 or HC(NH 2 ) 2 M 1 X 3 .
  • R 1 is an alkyl group, preferably an alkyl group having 1 to 5 carbon atoms, particularly preferably a methyl group.
  • M1 is a divalent metal ion, preferably Pb or Sn.
  • X is halogen and includes F, Cl, Br, and I; The three X's may all be the same halogen element, or a plurality of halogens may be mixed.
  • a preferred example of the compound constituting the perovskite crystal material is a compound represented by the formula CH 3 NH 3 Pb(I 1-x Br x ) 3 (where 0 ⁇ x ⁇ 1).
  • the perovskite material can change the spectral sensitivity characteristics by changing the type and ratio of halogen.
  • the perovskite semiconductor thin film can be formed by various dry processes or solution film formation such as spin coating.
  • the second photoelectric conversion section 20 has charge transport layers 24 and 25 .
  • One of the charge transport layers 24 and 25 is a hole transport layer and the other is an electron transport layer.
  • Materials for the hole transport layer include, for example, poly-3-hexylthiophene (P3HT), polythiophene derivatives such as poly(3,4-ethylenedioxythiophene) (PEDOT), 2,2′,7,7′- Fluorene derivatives such as tetrakis-(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (Spiro-OMeTAD), carbazole derivatives such as polyvinylcarbazole, triphenylamine derivatives, diphenylamine derivatives, polysilanes derivatives, polyaniline derivatives and the like.
  • P3HT poly-3-hexylthiophene
  • PEDOT poly(3,4-ethylenedioxythiophene)
  • Spiro-OMeTAD 2,2′,7,7′- Fluorene derivatives such as tetrakis-(N,N-di-p-methoxyphenylamine)-9
  • Materials for the electron transport layer include, for example, metal oxides such as titanium oxide, zinc oxide, niobium oxide, zirconium oxide, and aluminum oxide.
  • the first photoelectric conversion unit 10 and the second photoelectric conversion unit 20 described above are connected in series.
  • the combination of the charge transport layer 24/charge transport layer 25/conductivity-type semiconductor layer 14/conductivity-type semiconductor layer 15 of the second photoelectric conversion unit 20 (top cell T) and the first photoelectric conversion unit 10 (bottom cell B) is as follows.
  • An intermediate layer (not shown) may be provided between the first photoelectric conversion section 10 and the second photoelectric conversion section 20 .
  • the intermediate layer is provided for purposes such as bandgap adjustment between two stacked photoelectric conversion units, selective movement of carriers, formation of a tunnel junction, wavelength selective reflection, and the like.
  • the configuration of the intermediate layer is selected according to the type and combination of photoelectric conversion units 10 and 20 .
  • the intermediate layer can be omitted by providing the conductive semiconductor layer 14 and the charge transport layer 25 provided at the interface between the first photoelectric conversion section 10 and the second photoelectric conversion section 20 with a function as an intermediate layer. .
  • An electrode 31 for extracting photogenerated carriers is formed on the main surface of the second photoelectric conversion unit 20 opposite to the first photoelectric conversion unit 10, that is, on the light-receiving surface side of the solar cell 2.
  • An electrode 32 for extracting photogenerated carriers is formed on the main surface of the first photoelectric conversion unit 10 opposite to the second photoelectric conversion unit 20 , that is, on the back surface side of the solar cell 2 .
  • the electrode 31 may include a transparent electrode 311 and a metal electrode 312.
  • electrode 32 may include transparent electrode 321 and metal electrode 322 .
  • Metal oxides such as ITO, zinc oxide, and tin oxide are preferably used as materials for the transparent electrodes 311 and 321 .
  • Silver, copper, aluminum, or the like is preferably used as the material of the metal electrodes 312 and 322 .
  • the metal electrode 312 on the light receiving surface side is a grid-like or slit-like electrode.
  • the metal electrode 322 on the back side is preferably a grid-like or slit-like electrode.
  • the solar cell device 2 is a cross-sectional view of the solar cell device according to the present embodiment
  • FIG. 3 is a view of part of the solar cell device shown in FIG. 2 as seen from the light receiving surface side
  • FIG. 4 is shown in FIG. It is the figure which looked at a part of solar cell device from the back surface side.
  • the solar cell device 1 includes a plurality of solar cells 2, a plurality of connecting members 6, a plurality of light receiving side adhesive members 7, and a plurality of back side adhesive members 8.
  • FIG. 1 includes a plurality of solar cells 2, a plurality of connecting members 6, a plurality of light receiving side adhesive members 7, and a plurality of back side adhesive members 8.
  • a plurality of solar cells 2 are arranged in the Y direction, for example.
  • the connection member 6 electrically connects adjacent solar cells 2 . Specifically, one end of connection member 6 is connected to electrode 31 on the light receiving surface side of one solar cell 2 , and the other end of connection member 6 is connected to the back surface side of the other solar cell 2 . It is connected to the electrode 32 .
  • a plurality of solar cells 2 connected in a string like this is referred to as a solar cell string (solar cell device).
  • connection member 6 a known interconnector such as a tab is used.
  • the connection member 6 may be a ribbon wire made of a copper core coated with a low-melting-point metal or solder, a conductive film made of a thermosetting resin film containing low-melting-point metal particles or metal fine particles, or a plurality of films.
  • a member formed of a knitted or woven fabric knitted from conductive strands for example, see Japanese Patent Application Laid-Open No. 2016-219799 or Japanese Patent Application Laid-Open No. 2014-3161).
  • connection member 6 and the electrodes 31 and 32 of the solar cell 2 may be connected via a conductive adhesive member.
  • the conductive adhesive member includes a conductive film formed of a thermosetting resin film containing low-melting metal particles or metal fine particles, a conductive adhesive formed of low-melting metal fine particles or metal fine particles and a binder, or , a solder paste containing solder particles, or the like is used.
  • connection member 6 and the electrode 31 of the solar cell 2 are covered and connected with the light receiving side adhesive member 7 .
  • connection member 6 and the electrode 32 of the solar cell 2 are covered and connected with the back side adhesive member 8 .
  • the light-receiving-side adhesive member 7 is arranged on the light-receiving surface side of the solar cell 2 and bonds the electrode 31 of the solar cell 2 and the connection member 6 .
  • the light-receiving side adhesive member 7 is a sheet-like or film-like resin member, and covers the connection member 6 on the light-receiving side of the solar cell 2 so that the electrode 31 of the solar cell 2 and the connection member 6 are bonded together. and glue.
  • the back side adhesive member 8 is arranged on the back side of the solar cell 2 and bonds the electrode 32 of the solar cell 2 and the connection member 6 .
  • the back-side adhesive member 8 is a sheet-like or film-like resin member, and covers the connection member 6 on the back side of the solar cell 2 so that the electrode 32 of the solar cell 2 and the connection member 6 are bonded together. to glue.
  • the volume of the back side adhesive member 8 is larger than the volume of the light receiving side adhesive member 7 . More specifically, the attachment volume of the back side adhesive member 8 attached to the back surface of the solar cell 2 and the connection member 6 is equal to the attachment volume of the light receiving side adhesive member 7 attached to the light receiving surface of the solar cell 2 and the connection member 6. bigger than
  • the back side adhesive member 8 may be thicker than the light receiving side adhesive member 7 . More specifically, the adhesion thickness of the back side adhesive member 8 adhering to the back surface of the solar cell 2 and the connecting member 6 is the adhesion thickness of the light receiving side adhesive member 7 adhering to the light receiving surface of the photovoltaic cell 2 and the connecting member 6. It may be thicker than the thickness.
  • the area of the back side adhesive member 8 may be larger than the area of the light receiving side adhesive member 7 . More specifically, the attachment area of the back side adhesive member 8 attached to the back surface of the solar cell 2 and the connection member 6 is equal to the attachment area of the light receiving side adhesive member 7 attached to the light receiving surface of the solar cell 2 and the connection member 6. may be greater than
  • FIGS. 6 and 7 are cross-sectional views of solar cell devices according to modifications of the present embodiment.
  • the area of the back side adhesive member 8 is the same as the area of the light receiving side adhesive member 7, but the thickness of the back side adhesive member 8 may be thicker than the thickness of the light receiving side adhesive member 7.
  • the thickness of the back side adhesive member 8 is the same as the thickness of the light receiving side adhesive member 7, but the area of the back side adhesive member 8 is larger than the area of the light receiving side adhesive member 7. good too.
  • the adhesion thickness described above is the thickness of the light-receiving side adhesive member 7 or the back side adhesive member 8 at the adhesion portion
  • the adhesion area is the area of the light reception side adhesive member 7 or the back side adhesion member 8 at the adhesion portion
  • the deposition volume is the product of the deposition thickness and the deposition area.
  • Materials for the light-receiving side adhesive member 7 and/or the back side adhesive member 8 include, for example, ethylene/vinyl acetate copolymer (EVA), ethylene/ ⁇ -olefin copolymer, ethylene/vinyl acetate/triallyl isocyanurate (EVAT ), polyvinyl butyrate (PVB), acrylic resin, urethane resin, epoxy resin, or translucent resin such as silicone resin.
  • EVA ethylene/vinyl acetate copolymer
  • EVAT ethylene/ ⁇ -olefin copolymer
  • EVAT ethylene/vinyl acetate/triallyl isocyanurate
  • PVB polyvinyl butyrate
  • acrylic resin urethane resin
  • epoxy resin epoxy resin
  • translucent resin such as silicone resin.
  • the light-receiving side adhesive member 7 and the back side adhesive member 8 may be made of the same material or may be made of different materials.
  • the light-receiving side adhesive member 7 has optical transparency.
  • the material of the back side adhesive member 8 is also the above-described material, since the back side adhesive member 8 also has light transmission properties. As a result, not only light from the light-receiving surface side but also light from the back surface side can be made incident, and the photoelectric conversion efficiency can be improved.
  • the difference between the refractive index of the light-receiving side adhesive member 7 and the refractive index of the sealing material 5 described later is preferably 0.05 or less. Also, the difference between the refractive index of the back adhesive member 8 and the refractive index of the sealing material 5 described later is preferably 0.05 or less.
  • the material of the light-receiving side adhesive member 7 and/or the back side adhesive member 8 is ethylene/vinyl acetate copolymer (EVA) or ethylene/ ⁇ -olefin copolymer
  • the material of the sealing material 5 described later is ethylene/ Vinyl acetate copolymer (EVA) or ethylene/ ⁇ -olefin copolymer may be used as long as the copolymer ratio is the same as or different from the material of the light-receiving side adhesive member 7 and/or the back side adhesive member 8 .
  • the softening temperature of the light-receiving side adhesive member 7 is preferably higher than the softening temperature of the sealing material 5 described later, and the softening temperature of the back side adhesive member 8 is preferably higher than the softening temperature of the sealing material 5 described later.
  • the material of the light-receiving side adhesive member 7 and the back side adhesive member 8 is ethylene/vinyl acetate copolymer (EVA) or ethylene/ ⁇ -olefin copolymer, and the material of the sealing material 5 described later is ethylene/vinyl acetate.
  • a copolymer (EVA) or an ethylene/ ⁇ -olefin copolymer may be used as long as the copolymer ratio is different from the material of the light-receiving side adhesive member 7 and/or the back side adhesive member 8 .
  • FIG. 5 is a cross-sectional view of the solar cell module according to this embodiment. As shown in FIG. 1 , a solar cell module 100 includes one or more solar cell devices 1 .
  • the solar cell device 1 is sandwiched between the light receiving side protective member 3 and the back side protective member 4 .
  • a liquid or solid sealing material 5 is filled between the light-receiving-side protective member 3 and the back-side protective member 4 , thereby sealing the solar cell device 1 .
  • the sealing material 5 seals and protects the solar battery device 1, that is, the solar battery cell 2, between the light-receiving-side surface of the solar battery cell 2 and the light-receiving-side protective member 3, and between the solar battery cell. 2 and the back side protection member 4.
  • the shape of the sealing material 5 is not particularly limited, and may be, for example, a sheet shape. This is because the sheet shape facilitates covering the front and back surfaces of the planar solar battery cell 2 .
  • the material of the sealing material 5 is not particularly limited, it is preferable that the material has the property of transmitting light (translucency). Moreover, it is preferable that the material of the encapsulant 5 has adhesiveness to bond the photovoltaic cell 2 , the light-receiving side protective member 3 , and the back side protective member 4 .
  • Examples of such materials include ethylene/vinyl acetate copolymer (EVA), ethylene/ ⁇ -olefin copolymer, ethylene/vinyl acetate/triallyl isocyanurate (EVAT), polyvinyl butyrate (PVB), acrylic Translucent resins such as resins, urethane resins, and silicone resins can be used.
  • the light-receiving-side protective member 3 covers the surface (light-receiving surface) of the solar battery device 1 , that is, the solar battery cell 2 via the sealing material 5 to protect the solar battery cell 2 .
  • the shape of the light-receiving-side protective member 3 is not particularly limited, but a plate-like or sheet-like shape is preferable from the point of indirectly covering the planar light-receiving surface.
  • the material of the light-receiving side protective member 3 is not particularly limited, it is preferable to use a material that has translucency and is resistant to ultraviolet light, similar to the sealing material 5.
  • a material that has translucency and is resistant to ultraviolet light similar to the sealing material 5.
  • glass, or Transparent resins such as acrylic resins and polycarbonate resins can be used.
  • the surface of the light-receiving-side protective member 3 may be processed into an uneven shape, or may be coated with an antireflection coating layer. This is because the light-receiving-side protective member 3 having such a configuration makes it difficult to reflect the received light, and guides more light to the solar cell device 1 .
  • the back side protection member 4 covers the back side of the solar cell device 1 , that is, the solar cell 2 through the encapsulant 5 to protect the solar cell 2 .
  • the shape of the back side protection member 4 is not particularly limited, but like the light receiving side protection member 3, it is preferably plate-like or sheet-like in that it indirectly covers the planar back side.
  • the material for the back side protection member 4 is not particularly limited, but a material that prevents the infiltration of water or the like (has high water impermeability) is preferable.
  • a resin film such as polyethylene terephthalate (PET), polyethylene (PE), olefin-based resin, fluorine-containing resin, or silicone-containing resin, or a translucent plate-shaped resin member such as glass, polycarbonate, or acrylic,
  • PET polyethylene terephthalate
  • PE polyethylene
  • olefin-based resin fluorine-containing resin
  • silicone-containing resin or a translucent plate-shaped resin member such as glass, polycarbonate, or acrylic
  • a laminate with a metal foil such as an aluminum foil may be mentioned.
  • the light-receiving side protective member 3 and the material of the sealing material 5 described above have optical transparency.
  • the material of the back side protection member 4 is also the above-mentioned material, since the back side protection member 4 also has light transmittance. As a result, not only light from the light-receiving surface side but also light from the back surface side can be made incident, and the photoelectric conversion efficiency can be improved.
  • the light-receiving-side adhesive member 7 and the connecting member 6 are adhered to the light-receiving surface side of the solar cell 2 by heat treatment, and the back-side adhesive member 8 and the connecting member 6 are bonded together by heat treatment. 2 on the back side.
  • the heat treatment for bonding the connection member 6 to the solar cell 2 may cause the solar cell 2 to warp.
  • the thickness of the layers stacked on the light-receiving surface side of the crystalline silicon substrate and the back surface of the crystalline silicon substrate Warpage of the solar cell 2 may occur due to the difference in thickness of the layer laminated on the side. As a result, the solar cell device 1 may warp.
  • connection failure such as peeling of the connecting member 6 and crack failure of the solar cell 2 occur.
  • the light receiving side adhesive member 7 covers the connection member 6 on the light receiving surface side of the solar cell 2
  • the back side adhesive member 8 covers the solar cell. 2 covers the connecting member 6 on the back side thereof.
  • the volume (ie, thickness and/or area) of the back side adhesive member 8 is equal to the volume (ie, thickness and area) of the light receiving side adhesive member 7. / or area).
  • the heat treatment for bonding the connection member 6 to the solar cell 2 the warping of the solar cell 2 can be reduced, and the warping of the solar cell 2 can be caused by It is possible to reduce the warpage of the solar cell device 1 to be used. As a result, it is possible to reduce poor connection (peel-off) of the connection members 6 caused by the warping of the solar cell 2, in other words, the warping of the solar cell device 1.
  • FIG. 8 in the manufacturing process of the solar cell module 100 the heating and pressurizing process at the time of sealing the solar cell device 1, it is possible to reduce connection failure such as peeling of the connecting member 6 and crack failure of the solar cell. can. In this way, defects in the manufacturing process of the solar cell device 1 and the solar cell module 100 can be reduced, and the yield can be improved.
  • the size of solar cells has been increasing. As the size of the solar cell increases, the warping of the solar cell and the warping of the solar cell device tend to increase.
  • the features of the present embodiment are more effective in solar cell devices and solar cell modules that include such large tandem solar cells.
  • the difference between the refractive index of the light receiving side adhesive member 7 and the refractive index of the sealing material 5 and the difference between the refractive index of the back side adhesive member 8 and the refractive index of the sealing material 5 are 0. 0.05 or less.
  • the softening temperature of the light receiving side adhesive member 7 and the back side adhesive member 8 is higher than the softening temperature of the sealing material 5 .
  • the present invention is not limited to the above-described embodiments, and various modifications and variations are possible.
  • a solar cell device and a solar cell module including two-terminal tandem solar cells have been exemplified.
  • the features of the present invention are also applicable to solar devices and modules with four-terminal tandem solar cells, and also to solar devices and modules with three-terminal tandem solar cells. It is also applicable to solar cell modules.

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  • Electromagnetism (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne un dispositif de batterie solaire dans lequel le gauchissement du dispositif de batterie solaire attribuable au gauchissement des cellules de batterie solaire est réduit. Le dispositif de batterie solaire (1) comprend des cellules de batterie solaire de type à électrode double face (2), un élément de raccordement (6) qui sert à raccorder électriquement les cellules de batterie solaire (2), ainsi qu'un élément d'adhésion côté réception de lumière (7) et un élément d'adhésion côté arrière (8) qui sont destinés à faire adhérer ensemble l'élément de raccordement (6) et les cellules de batterie solaire (2). Les cellules de batterie solaire (2) sont des cellules de batterie solaire en tandem contenant chacune une première partie de conversion photoélectrique (10) qui comprend un substrat de silicium cristallin et une seconde partie de conversion photoélectrique (20) qui est disposée plus loin sur le côté de surface de réception de lumière que la première partie de conversion photoélectrique (10) et comprend un film mince de pérovskite. L'élément d'adhésion côté réception de lumière (7) est un élément en résine en forme de feuille ou de film qui recouvre l'élément de raccordement (6) sur le côté de surface de réception de lumière de chaque cellule de batterie solaire (2), l'élément d'adhésion côté arrière (8) est un élément en résine en forme de feuille ou de film qui recouvre l'élément de raccordement (6) sur le côté de surface arrière de chaque cellule de batterie solaire (2), et le volume de l'élément d'adhésion côté arrière (8) est plus grand que le volume de l'élément d'adhésion côté réception de lumière (7).
PCT/JP2022/032049 2021-09-13 2022-08-25 Dispositif de batterie solaire et module de batterie solaire Ceased WO2023037885A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014017398A (ja) * 2012-07-10 2014-01-30 Dexerials Corp 太陽電池モジュール及びその製造方法
WO2017195722A1 (fr) * 2016-05-09 2017-11-16 株式会社カネカ Dispositif de conversion photoélectrique type stratifié, et procédé de fabrication de celui-ci
JP2018011058A (ja) * 2016-07-13 2018-01-18 エルジー エレクトロニクス インコーポレイティド タンデム太陽電池、これを含むタンデム太陽電池モジュール及びこの製造方法
JP2018046112A (ja) * 2016-09-13 2018-03-22 パナソニックＩｐマネジメント株式会社 太陽電池モジュール
CN209709024U (zh) * 2019-04-19 2019-11-29 西南石油大学 一种双面受光钙钛矿/p型晶体硅基底叠层太阳电池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014017398A (ja) * 2012-07-10 2014-01-30 Dexerials Corp 太陽電池モジュール及びその製造方法
WO2017195722A1 (fr) * 2016-05-09 2017-11-16 株式会社カネカ Dispositif de conversion photoélectrique type stratifié, et procédé de fabrication de celui-ci
JP2018011058A (ja) * 2016-07-13 2018-01-18 エルジー エレクトロニクス インコーポレイティド タンデム太陽電池、これを含むタンデム太陽電池モジュール及びこの製造方法
JP2018046112A (ja) * 2016-09-13 2018-03-22 パナソニックＩｐマネジメント株式会社 太陽電池モジュール
CN209709024U (zh) * 2019-04-19 2019-11-29 西南石油大学 一种双面受光钙钛矿/p型晶体硅基底叠层太阳电池

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