WO2019230728A1 - 結晶系太陽電池セルの製造方法 - Google Patents
結晶系太陽電池セルの製造方法 Download PDFInfo
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- WO2019230728A1 WO2019230728A1 PCT/JP2019/021120 JP2019021120W WO2019230728A1 WO 2019230728 A1 WO2019230728 A1 WO 2019230728A1 JP 2019021120 W JP2019021120 W JP 2019021120W WO 2019230728 A1 WO2019230728 A1 WO 2019230728A1
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- passivation film
- opening
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- solar cell
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F10/00—Individual photovoltaic cells, e.g. solar cells
- H10F10/10—Individual photovoltaic cells, e.g. solar cells having potential barriers
- H10F10/14—Photovoltaic cells having only PN homojunction potential barriers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F71/00—Manufacture or treatment of devices covered by this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/20—Electrodes
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- 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
- Y02E10/547—Monocrystalline silicon PV cells
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- 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 a method for manufacturing a crystalline solar cell having a passivation film on one or both sides of a silicon substrate.
- a cell having a structure having an insulating film (passivation film) on both sides of a silicon solar cell has been actively developed.
- a PERC (passivated emitter and rear cell) type cell in which a passivation film and an electrode are formed on both sides using a p-type silicon substrate, and a passivation film and an electrode on both sides using an n-type silicon substrate.
- a cell having a PERT (passivated emitter and rear totally diffused) type structure in which is formed is known.
- a passivating contact type cell in which the passivation effect is enhanced by forming an oxide thin film and a silicon thin film between the passivation film and the silicon substrate, and these PERC type and PERT type.
- a back contact type cell in which surface (front surface) electrodes in a type and passivating contact type cell are integrated on the back surface of the cell is also known.
- the double-sided light-receiving solar cell can increase the amount of incident light by reducing the area of the back surface aluminum electrode.
- fine lines by screen printing using an aluminum-containing paste composition (paste composition) for forming a back electrode.
- paste composition paste composition
- fine lines that can be formed by screen printing have a width of about 200 ⁇ m. It is considered the limit. That is, conventionally, it is difficult to form a straight back electrode composed of a thin line having a width of less than 200 ⁇ m.
- the electrode is formed using the electrode forming paste composition as described above, for example, in the case of a PERC type cell, 1 or 2 is applied to the back surface passivation film formed on the back surface of the silicon substrate with a laser or the like.
- the back surface aluminum electrode is formed by forming the above opening and printing and baking the aluminum-containing paste composition in a region covering the opening.
- the paste composition that exists in a form that fills the opening reacts with the silicon substrate during firing to form an electric field layer (aluminum-silicon (Al—Si) alloy layer, p + layer, etc.) to form a BSF (back surface field). ) Bring effects.
- the back surface aluminum electrode having a width several times the width of the opening is formed, so that light incident from the back surface cannot be used efficiently.
- the present invention has been completed in order to improve the above-described problems of the prior art, and is a method for manufacturing a crystalline solar cell having a passivation film on one or both sides of a silicon substrate.
- Another object of the present invention is to provide a manufacturing method in which one or more electrodes are formed on the passivation film, in the case of the both surfaces, on one or both of the passivation films with a size close to the width of the opening.
- the present inventor has found that the above object can be achieved by the method for producing a crystalline solar cell having a specific process, and has completed the present invention.
- this invention relates to the manufacturing method of the following crystalline solar cell.
- a method for producing a crystalline solar cell having a passivation film on one or both sides of a silicon substrate (1) When the passivation film has a passivation film on one side, the passivation film is a passivation film A having one or more openings, and when the passivation film has a passivation film on both sides, one or both of the passivation films are 1 Or a passivation film A having two or more openings, and forming a coating film made of an electrode-forming paste composition in a region covering the openings of the passivation film A, (2) Step 2 of firing the silicon substrate and the coating film, and (3) Remaining at least the fired product formed in a mode of filling the concave portion of the opening, of the fired product formed in the other mode Step 3 for removing part or all of the above,
- the manufacturing method of a crystalline solar cell characterized by the above-mentioned.
- Item 3 The crystalline solar cell according to Item 1 or 2, wherein the electrode-forming paste composition is an aluminum-containing paste composition and contains 0.1 to 15 parts by mass of glass powder with respect to 100 parts by mass of aluminum powder. Battery cell manufacturing method. 4).
- the aluminum-containing paste composition includes 1) a glass powder containing at least one metal oxide selected from the group consisting of bismuth oxide, lead oxide, zinc oxide, silicon oxide and aluminum oxide, 2) metal oxide, and 3)
- the firing product formed in a manner to fill the concave portion of the opening is left at least, and by having a step of removing a part or all of the firing product formed in other embodiments, the width of the opening
- One or more types of electrodes can be formed with close sizes. By forming the electrode with a size close to the width of the opening, a wide light receiving area can be secured, incident light can be used more effectively, and power generation characteristics can be improved.
- FIG. (A) It is an upper surface observation image by the laser microscope of the back surface aluminum electrode in the photovoltaic cell sample produced by the comparative example 2.
- FIG. (B) It is an upper surface observation image by the laser microscope of the back surface aluminum electrode in the photovoltaic cell sample produced in Example 1.
- FIG. (A) It is a cross-sectional observation image by SEM (scanning electron microscope) of the back surface aluminum electrode in the photovoltaic cell sample produced by the comparative example 2.
- FIG. (B) It is a cross-sectional observation image by SEM of the back surface aluminum electrode in the photovoltaic cell sample produced in Example 1.
- FIG. It is a figure which shows typically the silicon substrate 1 which has the two openings 6 in the back surface passivation film 5.
- FIG. 4 it is the schematic diagram after removing the baked product 7 of the aluminum containing paste composition which exists in the outer side (part which is not the aspect which fills a recessed part).
- the Al—Si layer 8 acts as a back surface aluminum electrode.
- the production method of the present invention is a method for producing a crystalline solar cell having a passivation film on one or both sides of a silicon substrate, (1) When the passivation film has a passivation film on one side, the passivation film is a passivation film A having one or more openings, and when the passivation film has a passivation film on both sides, one or both of the passivation films are 1 Or a passivation film A having two or more openings, and forming a coating film made of an electrode-forming paste composition in a region covering the openings of the passivation film A, (2) Step 2 of firing the silicon substrate and the coating film, and (3) Remaining at least the fired product formed in a mode of filling the concave portion of the opening, of the fired product formed in the other mode Step 3 for removing part or all of the above, In order.
- the manufacturing method of the present invention among the fired products of the coating film of the electrode forming paste composition applied to the region covering the opening of the passivation film A having one or more openings among the passivation films, it is a kind with a size close to the width of the opening.
- the above electrodes can be formed. By forming the electrode with a size close to the width of the opening, a wide light receiving area can be secured, incident light can be used more effectively, and power generation characteristics can be improved.
- the method for manufacturing a crystalline solar cell according to the present invention is a method for manufacturing a crystalline solar cell having a passivation film on one or both sides of a silicon substrate, and the passivation is applied when the passivation film is provided on the one side.
- the film is a passivation film A having one or more openings, and when the film has a passivation film on both surfaces, one or both of the passivation films are the passivation film A having one or more openings.
- the passivation film other than the passivation film A means a passivation film having no opening.
- the passivation film A is a back surface passivation film, and forms a back electrode (for example, a back surface aluminum electrode) having a size close to the width of the opening.
- a back surface electrode for example, a back surface aluminum electrode
- the passivation film A is provided on both surfaces of the silicon substrate, for example, a back surface electrode (for example, a back surface aluminum electrode) is formed on the back surface passivation film with a size close to the width of the opening, and the front surface (front surface)
- a mode in which a surface electrode for example, a silver electrode, a copper electrode, or an aluminum electrode
- a surface electrode for example, a silver electrode, a copper electrode, or an aluminum electrode
- the modes to which the manufacturing method of the present invention can be applied vary widely depending on the type of electrode and the surface on which the electrode is provided.
- one or more of the electrodes are provided on either the front surface and / or the back surface of the silicon substrate.
- An electrode-forming paste composition (aluminum-containing paste composition, silver-containing paste composition, copper-containing paste composition, etc., depending on the type of electrode) is applied to a region covering the opening of the passivation film A having a plurality of openings.
- One or more electrodes can be formed with a size close to the width of the opening by forming a film (step 1 described later) and processing the fired product along steps 2 and 3 described later.
- a post-process 1 for the surface passivation film A (further post-process 2 and 3) and a post-process 1 for the back-surface passivation film A (further post-process).
- Steps 2 and 3) may be performed simultaneously on both sides, or may be performed separately on the front and back instead of simultaneously.
- a mode in which a back surface aluminum electrode is formed with a size close to the width of the opening in the opening portion of the back surface passivation film A among the front and back surface passivation films, particularly in the cell of the PERC type structure (also referred to as “this mode”).
- Step 1 forms a coating film made of an electrode-forming paste composition in a region covering the opening of the passivation film A.
- the silicon substrate for example, a p-type silicon substrate, an n-type silicon substrate, a silicon substrate combining them, or the like can be used.
- this embodiment will be described with reference to FIGS. 3 to 5 using a p-type silicon substrate (p-type Si) 1.
- the thickness of the silicon substrate 1 is not limited, but a thickness of 180 to 250 ⁇ m is preferable.
- a film provided with a back surface passivation film 5 as a laminated film of an aluminum oxide film and a silicon nitride film can be used on the side (back surface) opposite to the surface including the silver electrode 4.
- the back surface passivation film 5 is provided with one or more openings 6. That is, in this embodiment, the back surface passivation film 5 is the passivation film A.
- the opening 6 is an opening for making contact with the silicon substrate 1 and can be formed by laser irradiation, etching, or the like.
- the form of the opening 6 is not limited, and a straight line shape, a curved line shape, a broken line shape, a dot shape, or the like can be appropriately employed.
- the arrangement is not limited, and a regular arrangement or a random arrangement can be adopted.
- each opening 6 has a linear shape with a width of 20 to 100 ⁇ m. From the viewpoint of controlling the electrode pattern, the openings 6 can be regularly formed vertically and horizontally in the plan view of the silicon substrate 1. preferable.
- the paste composition may be any paste composition for electrode formation.
- the paste composition is an aluminum-containing paste composition for forming a back surface aluminum electrode.
- the paste composition is a paste in which aluminum powder is dispersed in an organic solvent. .
- composition of the aluminum powder is not particularly limited, and pure aluminum having a purity of 99 wt% or more can be used, but an aluminum alloy powder can also be used as appropriate.
- the form of the aluminum powder includes a spherical shape and an ellipsoid, but is not particularly limited. Of these, spherical ones are preferable because they have good printability and good reaction with silicon.
- the average particle size of the aluminum powder is preferably 1 ⁇ m or more and 20 ⁇ m or less from the viewpoint of printability, reactivity, and the like. More preferably, it is 1 ⁇ m or more and 6 ⁇ m or less.
- the paste composition preferably contains 0.1 to 15 parts by weight of glass powder with respect to 100 parts by weight of aluminum powder.
- the composition of the glass powder is not particularly limited.
- B 2 O 3 , Bi 2 O 3 , ZnO, SiO 2 , Al 2 O 3 , BaO, CaO, SrO, V 2 O 5 , Sb 2 O 3 , WO 3 A glass powder containing one or more components selected from the group consisting of P 2 O 5 and TeO 2 can be used.
- glass powder (bismuth-based glass powder) containing a B 2 O 3 component it is preferable for improving the reactivity between silicon and aluminum.
- the paste composition in order to remove part of the fired product of the paste composition in Step 3 to be described later, contains glass powder, oxide, hydroxide, etc. that suppresses sintering in order to enhance removability. It is preferable to do.
- the glass powder containing 60% by weight or more of any one metal oxide of bismuth oxide, lead oxide, zinc oxide, silicon oxide and aluminum oxide can be used as the glass powder for suppressing the sintering.
- the oxide that suppresses the sintering include silicon oxide, aluminum oxide, calcium oxide, bismuth oxide, lead oxide, zinc oxide, and germanium oxide.
- the hydroxide that suppresses the sintering include aluminum hydroxide and zinc hydroxide.
- the paste composition generally contains an organic solvent, resin, glass powder, etc. in addition to aluminum powder.
- the composition is not limited, in 100% by mass of the paste composition, the aluminum powder is 60% by weight to 90% by weight, the organic solvent is 2% by weight to 20% by weight, and the balance is 2% by weight to 20% by weight. It can be as follows.
- organic solvent is not limited, for example, diethylene glycol monobutyl ether, terpineol, or the like can be used.
- a coating film made of the paste composition is formed in a region covering one or more openings of the passivation film A, but the application method is not limited, and for example, a screen printing or dispensing method is used. Can do.
- the paste composition is applied so as to fill (fill) the concave portion of the opening, and is spread over the region covering the passivation film A in the range of 1 ⁇ m to 1000 ⁇ m from the end of the opening.
- the coating film thickness (coating film thickness on the passivation film A) of a paste composition 10 micrometers or more and 40 micrometers or less are preferable. After application, it is dried at room temperature or under heating.
- Step 2 firing process
- the silicon substrate and the coating film are baked.
- the firing treatment can be performed in an air atmosphere or a nitrogen atmosphere.
- the firing temperature is preferably 500 ° C. or higher and 1000 ° C. or lower, and more preferably 650 ° C. or higher and 850 ° C. or lower.
- the firing time can be adjusted by the firing temperature, but can be 3 seconds or more and 300 seconds or less.
- the firing treatment in this embodiment, aluminum and silicon react with each other in the portion where the aluminum contained in the paste composition for the concave portion of the opening is in contact with the silicon substrate, and the electric field layer (Al—Si alloy layer 8, p + A layer 9) is formed, and a fired product 7 of the paste composition is formed outside the concave portion of the opening (see FIG. 4).
- the presence of the p + layer 9 prevents the recombination of electrons and provides a BSF effect that improves the collection efficiency of the generated carriers.
- Step 3 Partial removal treatment of the fired product
- step 3 at least the fired product formed in such a manner as to fill the concave portion of the opening is left, and a part or all of the fired product formed in other modes is removed.
- step 3 at least the fired product (alloy layer 8 and p + layer 9 in FIG. 4) formed so as to fill the concave portion of the opening is left, and the fired product formed in other modes (outside the opening).
- the fired product 7 When part or all of the fired product 7 is removed, acid etching, polishing, or the like can be used.
- the paste composition contains glass powder, oxide, hydroxide or the like that suppresses sintering, a part or all of the fired product 7 can be naturally peeled without polishing or the like. .
- the removal rate can be set as appropriate.
- the back surface aluminum electrode can be formed with a size substantially the same as or close to the width of the opening of the passivation film by passing through the above steps 1 to 3 (particularly step 3), and is incident from the back surface. Light can be used more effectively.
- the resistance value of the electrode can be lowered while maintaining the electrode area.
- the present invention is not limited to the above-described embodiment, and in various types of cells of PERC type, PERT type, passivating contact type, and back contact type, the width of the opening is formed in the passivation film A on the front surface and / or back surface of the silicon substrate.
- the present invention can be widely applied when forming one or more kinds of electrodes with a size close to.
- the back surface aluminum electrode is as described above, but for other types of electrodes, a known electrode in this field can be produced by applying a known electrode forming paste composition to the production method of the present invention. it can.
- Example 1 A paste composition was prepared by adding 3 parts by weight of bismuth-based glass powder and 29 parts by weight of an organic vehicle to 100 parts by weight of aluminum powder and mixing them with a known mixer.
- a screen mask with an opening width of 60 ⁇ m on the back surface of a solar cell having a linear film opening of 45 ⁇ m width on the back surface passivation film (passivation film A) of a PERC type solar cell having a wafer size of 156 mm square It apply
- FIG. 1B shows an upper surface observation image of the back surface aluminum electrode in the solar cell sample prepared in Example 1 with a laser microscope. Moreover, the cross-sectional observation image by SEM of the back surface aluminum electrode in the photovoltaic cell sample produced in Example 1 is shown in FIG.2 (b).
- Example 2 A solar battery cell sample was obtained in the same manner as in Example 1 except that the paste composition was applied by screen printing to a region covering the backside passivation film opening width using a screen mask having an opening width of 100 ⁇ m.
- Example 3 A solar cell sample was obtained in the same manner as in Example 1 except that the paste composition was applied by screen printing to a region covering the opening width of the backside passivation film using a screen mask having an opening width of 150 ⁇ m.
- Comparative Example 1 A paste composition was prepared by adding 3 parts by weight of bismuth-based glass powder and 29 parts by weight of an organic vehicle to 100 parts by weight of aluminum powder and mixing them with a known mixer.
- Comparative Example 2 A solar cell sample was obtained in the same manner as in Comparative Example 1 except that the paste composition was applied by screen printing to a region covering the backside passivation film opening width using a screen mask having an opening width of 60 ⁇ m.
- FIG. 1 (a) shows an upper surface observation image of the back surface aluminum electrode in the solar cell sample produced in Comparative Example 2 by a laser microscope. Moreover, the cross-sectional observation image by SEM (scanning electron microscope) of the back surface aluminum electrode in the photovoltaic cell sample produced by the comparative example 2 is shown to Fig.2 (a).
- Comparative Example 3 A solar cell sample was obtained in the same manner as in Comparative Example 1 except that the paste composition was applied by screen printing to a region covering the backside passivation film opening width using a screen mask having an opening width of 100 ⁇ m.
- Comparative Example 4 A solar cell sample was obtained in the same manner as in Comparative Example 1 except that the paste composition was applied to a region covering the backside passivation film opening width by screen printing using a screen mask having an opening width of 150 ⁇ m.
- Test example 1 The back surface aluminum electrode of the obtained photovoltaic cell sample was observed using a laser microscope (manufactured by Keyence Corporation), and the line width was measured. Further, the power generation characteristic Isc on the back side was measured under the light of a solar simulator (manufactured by Wacom Denso Co., Ltd.).
- Table 1 shows the measured electrode width and Isc characteristics.
- the paste composition by screen printing it is preferable to use a screen plate having a width of 60 ⁇ m or more because disconnection was observed in the coated film when a screen plate having a width of 50 ⁇ m was used.
- the formed electrode spreads to about 130 ⁇ m, and it is difficult to form an electrode of 60 ⁇ m or less by the conventional method.
- the final electrode width was 60 ⁇ m or less regardless of the screen printing line width. Therefore, an arbitrary screen width of 60 ⁇ m to several 100 ⁇ m can be used.
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Abstract
Description
1.シリコン基板の片面又は両面にパッシベーション膜を有する結晶系太陽電池セルの製造方法であって、
(1)前記片面にパッシベーション膜を有する場合には当該パッシベーション膜が1又は2以上の開口を有するパッシベーション膜Aであり、前記両面にパッシベーション膜を有する場合には当該パッシベーション膜の片方又は両方が1又は2以上の開口を有するパッシベーション膜Aであり、前記パッシベーション膜Aの前記開口を覆う領域に電極形成用ペースト組成物からなる塗膜を形成する工程1、
(2)前記シリコン基板及び前記塗膜を焼成処理する工程2、及び
(3)前記開口の凹部分を埋める態様で形成された焼成物は少なくとも残し、それ以外の態様で形成された焼成物の一部又は全部を除去する工程3、
を順に備えることを特徴とする、結晶系太陽電池セルの製造方法。
2.前記開口は、1つあたり幅20~100μmの直線状である、上記項1に記載の結晶系太陽電池セルの製造方法。
3.前記電極形成用ペースト組成物は、アルミニウム含有ペースト組成物であり、アルミニウム粉末100質量部に対して、ガラス粉末を0.1~15質量部含有する、上記項1又は2に記載の結晶系太陽電池セルの製造方法。
4.前記アルミニウム含有ペースト組成物は、1)酸化ビスマス、酸化鉛、酸化亜鉛、酸化ケイ素及び酸化アルミニウムからなる群から選択される少なくとも一種の金属酸化物を含有するガラス粉末、2)金属酸化物、並びに、3)金属水酸化物からなる群から選択される少なくとも一種を含有する、上記項3に記載の結晶系太陽電池セルの製造方法。
(1)前記片面にパッシベーション膜を有する場合には当該パッシベーション膜が1又は2以上の開口を有するパッシベーション膜Aであり、前記両面にパッシベーション膜を有する場合には当該パッシベーション膜の片方又は両方が1又は2以上の開口を有するパッシベーション膜Aであり、前記パッシベーション膜Aの前記開口を覆う領域に電極形成用ペースト組成物からなる塗膜を形成する工程1、
(2)前記シリコン基板及び前記塗膜を焼成処理する工程2、及び
(3)前記開口の凹部分を埋める態様で形成された焼成物は少なくとも残し、それ以外の態様で形成された焼成物の一部又は全部を除去する工程3、
を順に備えることを特徴とする。
工程1は、前記パッシベーション膜Aの前記開口を覆う領域に電極形成用ペースト組成物からなる塗膜を形成する。
工程2は、前記シリコン基板及び前記塗膜を焼成処理する。
工程3は、前記開口の凹部分を埋める態様で形成された焼成物は少なくとも残し、それ以外の態様で形成された焼成物の一部又は全部を除去する。
アルミニウム粉末100質量部に対して、ビスマス系ガラス粉末を3質量部、及び有機ビヒクルを29質量部加えて、周知の混合機にて混合しペースト組成物を作製した。
ペースト組成物を開口幅100μm幅のスクリーンマスクを使用して裏面パッシベーション膜開口幅を覆う領域にスクリーン印刷により塗布する以外は、実施例1と同様にして太陽電池セルサンプルを得た。
ペースト組成物を開口幅150μm幅のスクリーンマスクを使用して裏面パッシベーション膜開口幅を覆う領域にスクリーン印刷により塗布する以外は、実施例1と同様にして太陽電池セルサンプルを得た。
アルミニウム粉末100質量部に対して、ビスマス系ガラス粉末を3質量部、及び有機ビヒクルを29質量部加えて、周知の混合機にて混合しペースト組成物を作製した。
ペースト組成物を開口幅60μm幅のスクリーンマスクを使用して裏面パッシベーション膜開口幅を覆う領域にスクリーン印刷により塗布する以外は、比較例1と同様にして太陽電池セルサンプルを得た。
ペースト組成物を開口幅100μm幅のスクリーンマスクを使用して裏面パッシベーション膜開口幅を覆う領域にスクリーン印刷により塗布する以外は、比較例1と同様にして太陽電池セルサンプルを得た。
ペースト組成物を開口幅150μm幅のスクリーンマスクを使用して裏面パッシベーション膜開口幅を覆う領域にスクリーン印刷により塗布する以外は、比較例1と同様にして太陽電池セルサンプルを得た。
得られた太陽電池セルサンプルの裏面アルミニウム電極をレーザー顕微鏡(キーエンス社製)を用いて観察し、線幅を測定した。また、ソーラーシミュレーター(株式会社ワコム電創社製)光下にて、裏面側の発電特性Iscを測定した。
2.表面パッシベーション膜
3.n型シリコン層(n+エミッター層)
4.銀電極
5.裏面パッシベーション膜(パッシベーション膜A)
6.レーザー開口
7.ペースト組成物の焼成物
8.Al-Si合金層
9.p+層
Claims (4)
- シリコン基板の片面又は両面にパッシベーション膜を有する結晶系太陽電池セルの製造方法であって、
(1)前記片面にパッシベーション膜を有する場合には当該パッシベーション膜が1又は2以上の開口を有するパッシベーション膜Aであり、前記両面にパッシベーション膜を有する場合には当該パッシベーション膜の片方又は両方が1又は2以上の開口を有するパッシベーション膜Aであり、前記パッシベーション膜Aの前記開口を覆う領域に電極形成用ペースト組成物からなる塗膜を形成する工程1、
(2)前記シリコン基板及び前記塗膜を焼成処理する工程2、及び
(3)前記開口の凹部分を埋める態様で形成された焼成物は少なくとも残し、それ以外の態様で形成された焼成物の一部又は全部を除去する工程3、
を順に備えることを特徴とする、結晶系太陽電池セルの製造方法。 - 前記開口は、1つあたり幅20~100μmの直線状である、請求項1に記載の結晶系太陽電池セルの製造方法。
- 前記電極形成用ペースト組成物は、アルミニウム含有ペースト組成物であり、アルミニウム粉末100質量部に対して、ガラス粉末を0.1~15質量部含有する、請求項1又は2に記載の結晶系太陽電池セルの製造方法。
- 前記アルミニウム含有ペースト組成物は、1)酸化ビスマス、酸化鉛、酸化亜鉛、酸化ケイ素及び酸化アルミニウムからなる群から選択される少なくとも一種の金属酸化物を含有するガラス粉末、2)金属酸化物、並びに、3)金属水酸化物からなる群から選択される少なくとも一種を含有する、請求項3に記載の結晶系太陽電池セルの製造方法。
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| JP2013512546A (ja) * | 2009-11-25 | 2013-04-11 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | アルミニウムペーストと不動態化エミッタおよび背面接点シリコン太陽電池の製造においてのその使用 |
| JP2013219355A (ja) * | 2012-04-04 | 2013-10-24 | Samsung Sdi Co Ltd | 光電素子の製造方法 |
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| KR20160122467A (ko) * | 2015-04-14 | 2016-10-24 | 엘지전자 주식회사 | 태양 전지의 제조 방법 |
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| JP2015191971A (ja) * | 2014-03-27 | 2015-11-02 | 株式会社ノリタケカンパニーリミテド | ファイヤースルー用アルミニウムペーストおよび太陽電池素子 |
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2019
- 2019-05-28 JP JP2020522214A patent/JPWO2019230728A1/ja active Pending
- 2019-05-28 WO PCT/JP2019/021120 patent/WO2019230728A1/ja not_active Ceased
- 2019-05-28 CN CN201980036778.9A patent/CN112424952B/zh active Active
- 2019-05-29 TW TW108118600A patent/TWI807034B/zh active
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| JP2013512546A (ja) * | 2009-11-25 | 2013-04-11 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | アルミニウムペーストと不動態化エミッタおよび背面接点シリコン太陽電池の製造においてのその使用 |
| JP2011165668A (ja) * | 2010-02-12 | 2011-08-25 | Giga Solar Materials Corp | 導電性アルミニウムペースト及びその製造方法、太陽電池及びそのモジュール |
| JP2013219355A (ja) * | 2012-04-04 | 2013-10-24 | Samsung Sdi Co Ltd | 光電素子の製造方法 |
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| KR20160122467A (ko) * | 2015-04-14 | 2016-10-24 | 엘지전자 주식회사 | 태양 전지의 제조 방법 |
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| TWI807034B (zh) | 2023-07-01 |
| JPWO2019230728A1 (ja) | 2021-07-15 |
| CN112424952A (zh) | 2021-02-26 |
| CN112424952B (zh) | 2025-07-29 |
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