WO2014157060A1 - Cellule solaire et procédé de fabrication de cellule solaire à colorant - Google Patents

Cellule solaire et procédé de fabrication de cellule solaire à colorant Download PDF

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Publication number
WO2014157060A1
WO2014157060A1 PCT/JP2014/058027 JP2014058027W WO2014157060A1 WO 2014157060 A1 WO2014157060 A1 WO 2014157060A1 JP 2014058027 W JP2014058027 W JP 2014058027W WO 2014157060 A1 WO2014157060 A1 WO 2014157060A1
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Prior art keywords
porous
electrode
solar cell
dye
anode electrode
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PCT/JP2014/058027
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English (en)
Japanese (ja)
Inventor
佐々木　健了
俊久 藤高
河野　充
健二 肆矢
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新日鉄住金化学株式会社
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Priority to JP2015508468A priority Critical patent/JPWO2014157060A1/ja
Publication of WO2014157060A1 publication Critical patent/WO2014157060A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/20—Light-sensitive devices
    • H01G9/2068—Panels or arrays of photoelectrochemical cells, e.g. photovoltaic modules based on photoelectrochemical cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/20—Light-sensitive devices
    • H01G9/2027—Light-sensitive devices comprising an oxide semiconductor electrode
    • H01G9/2031—Light-sensitive devices comprising an oxide semiconductor electrode comprising titanium oxide, e.g. TiO2
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/20—Light-sensitive devices
    • H01G9/2059—Light-sensitive devices comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution
    • 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
    • Y02E10/542—Dye sensitized solar 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 an electrode structure of a solar cell.
  • the solar cell refers to all photoelectric conversion elements that convert light into electric power in a broad sense.
  • a solar cell is a semiconductor element using a pn junction of p-type and n-type semiconductors.
  • Examples of solar cells made of such semiconductor elements include silicon-based solar cells using silicon semiconductors, compound thin-film solar cells using compound semiconductors, and organic thin-film solar cells using organic semiconductors.
  • the dye-sensitized solar cell has an electrolyte solution as described below for the battery structure. Since it is used, a reliable sealing structure is required.
  • the latter dye-sensitized solar cell is called a wet solar cell or a Gretzel battery, and is characterized by having an electrochemical cell structure typified by an iodine solution.
  • Dye-sensitized solar cells are porous, such as a titania layer formed by baking titanium dioxide powder or the like on a transparent conductive glass plate (transparent conductive substrate anode electrode laminated with a transparent conductive film) and adsorbing the dye to this. It has a simple structure in which an iodine solution or the like is disposed as an electrolytic solution (electrolyte) between a counter electrode composed of a semiconductor layer and a conductive glass plate (conductive substrate cathode electrode).
  • the dye adsorbed on the surface of the porous titanium oxide electrode absorbs light and causes excitation of electrons.
  • the dye that has lost the electrons receives and regenerates electrons from iodine ions.
  • Dye-sensitized solar cells are attracting attention as low-cost solar cells because they are inexpensive and do not require large-scale equipment for production. However, since dye-sensitized solar cells have lower power generation efficiency than other solar cells, further improvement in power generation efficiency is required.
  • conventional dye-sensitized solar cells have extraction electrodes that are electrically connected to the anode electrode and the cathode electrode, respectively, extending around the cell, such as opposite ends of the cell in plan view. To do.
  • a conductor wiring is connected to the external connection terminal of each extraction electrode, and a load is provided between the two conductor wirings to generate power (see, for example, Patent Document 1).
  • the extension part of the extraction electrode provided in the periphery of the battery can be said to be a non-power generation area, in which the battery cannot be arranged with respect to the battery as the power generation area.
  • the incident light direction changing unit is arranged so as to cover a part of the power generation amount region, which causes a decrease in light transmittance. Further, the cost of providing the incident light direction changing unit is high.
  • the present inventors have a laminated structure part composed of a porous semiconductor layer adsorbing a dye, a conductor layer serving as a cathode electrode, and a conductive metal layer serving as an anode electrode.
  • One end portion of each of the layer and the conductor layer extends to be provided with an extending portion, in other words, an extraction electrode, and the laminated structure portion and the extending portion are sealed together with the encapsulated electrolyte by a sealing material, and conductive metal
  • a dye-sensitized solar cell is proposed in which a part of each layer and the extended portion of each conductor layer is exposed from a sealing material to serve as an external connection terminal (see Patent Document 3). Thereby, it can prevent reliably that electrolyte solution leaks from the extraction location of the extension part electrically connected to a conductive metal layer and a conductor layer.
  • the problem to be solved is that in the conventional solar cell, the effective planar area of the battery cell which is the power generation region is restricted by the non-power generation region occupied by the electrode structure.
  • a solar cell according to the present invention includes a photoelectric conversion unit, a porous anode electrode provided on the opposite side of the photoelectric conversion unit from the light incident side, and a nonporous cathode electrode or nonporous material provided to face the anode electrode.
  • a solar cell having a cathode electrode formed by laminating a material and a porous material and sealing the whole a non-porous conductor portion is laminated on the side opposite to the light incident side of a part of the electrode of the anode electrode And a part of the non-porous conductor part is exposed from the first opening formed in the sealing part at a position not overlapping the cathode electrode in plan view on the side opposite to the light incident side. And a part of the cathode electrode is exposed from a second opening formed on a side opposite to the light incident side at a position different from the first opening of the sealing portion, It is a connection terminal.
  • the photoelectric conversion part is disposed on the light incident side, and is a porous semiconductor layer that adsorbs a dye
  • the anode electrode is light incident on the porous semiconductor layer that adsorbs the dye.
  • the method for producing a dye-sensitized solar cell according to the present invention includes applying a slurry-like raw material of a porous anode electrode onto a base material that can be dissolved by chemical treatment, and sintering the slurry-like raw material to obtain a sintered body. Then, the substrate is separated from the sintered body by chemical treatment, and a dye-adsorbing porous semiconductor layer is formed on the sintered body to obtain a porous anode electrode with a dye-adsorbing porous semiconductor layer.
  • a step of laminating a non-porous conductor portion at one corner on the anode side of a porous anode electrode with a porous semiconductor layer, and a substantially same plane dimension as a porous anode electrode with a dye-adsorbing porous semiconductor layer A non-porous cathode electrode or a non-porous material and a porous material laminated with a non-porous cathode electrode formed by notching a portion corresponding to the non-porous conductor portion when overlapped with the anode electrode.
  • Process with a dye adsorbing porous semiconductor layer A step of laminating a porous anode electrode and a cathode electrode while aligning a non-porous conductor part of a porous anode electrode with a dye-adsorbing porous semiconductor layer and a notch part of the cathode electrode, and a resin sheet and an outer side of the cathode electrode Sealing with at least one of the sealing materials, and further forming an opening that exposes at least a part of the non-porous conductor part and a part of the cathode electrode to the outside of the cathode electrode.
  • the solar cell according to the present invention includes a photoelectric conversion unit, a nonporous transparent anode electrode provided on the light incident side of the photoelectric conversion unit, and a nonporous material provided to face the anode electrode with the photoelectric conversion unit interposed therebetween.
  • a part of the electrode of the anode electrode is a flat surface on the side opposite to the light incident side.
  • a fourth external connection terminal is exposed from a fourth opening formed at a position different from the third opening of the stopper.
  • a nonporous conductor portion is laminated on the side opposite to the light incident side of a part of the electrode of the porous anode, and a part of the nonporous conductor portion is formed on the light incident side. Is exposed from a first opening formed in the sealing portion on the opposite side to serve as a first external connection terminal, and a non-porous cathode electrode or a cathode electrode in which a non-porous material and a porous material are laminated A part of the electrode is exposed from a second opening formed at a position different from the first opening of the sealing portion on the side opposite to the light incident side to serve as a second external connection terminal.
  • the extraction electrode does not extend to the end portions of the anode and cathode electrodes in plan view, the planar area of the battery cell as the power generation region is restricted by the non-power generation region occupied by the electrode structure.
  • an internal structure component such as a photoelectric conversion part in contact with the porous anode electrode is interposed through the porous anode electrode. Since it does not substantially communicate with the outside, it is possible to reduce contamination of internal structural components due to the external atmosphere.
  • the solar cell is a porous semiconductor layer that adsorbs the dye
  • the photoelectric conversion part is disposed on the light incident side
  • the anode electrode is opposite to the light incident side of the porous semiconductor layer that adsorbs the dye
  • a porous conductor layer provided on the side surface, and the cathode electrode is porous with a non-porous conductor layer or a non-porous material provided opposite to the porous conductor layer via an electrolyte layer to be sealed
  • the conductive layer is formed by laminating a porous material, there is little possibility that the electrolyte will leak to the outside through the porous anode electrode.
  • the method for producing a dye-sensitized solar cell according to the present invention can suitably obtain the above-described dye-sensitized solar cell.
  • the solar cell according to the present invention is a third portion formed in a sealing portion at a position where a part of the electrode of the nonporous transparent anode electrode does not overlap the cathode electrode in a plan view on the side opposite to the light incident side.
  • a fourth opening that is exposed from the opening to serve as a third external connection terminal, and a part of the cathode electrode is formed at a position opposite to the incident side at a position different from the third opening of the sealing portion.
  • the internal structure components such as the photoelectric conversion part that is in contact with the porous anode electrode are passed through the porous anode electrode with a simple configuration that directly exposes a part of the electrode of the anode electrode. Therefore, the internal structural components can be prevented from being contaminated by the external atmosphere.
  • FIG. 1 is a plan view of a solar cell according to a first example of the present embodiment as viewed from the light incident side.
  • FIG. 2 is a partial cross-sectional view as seen from the direction AA in FIG.
  • FIG. 3 is a partial cross-sectional view as seen from the direction BB in FIG.
  • FIG. 4 is an example showing an overlapping state of the anode electrode and the cathode electrode in the solar cell according to the first example of the present embodiment.
  • FIG. 5 is an example different from FIG. 4 showing the overlapping state of the anode and cathode in the solar cell according to the first example of the present embodiment.
  • FIG. 6 is a plan view of the solar cell according to the second example of the present embodiment as viewed from the light incident side.
  • FIG. 7 is a partial cross-sectional view as seen from the direction AA in FIG.
  • FIG. 8 is a partial cross-sectional view seen from the BB direction in FIG.
  • a solar cell 10 according to the first example of the present embodiment shown in FIGS. 1 to 3 includes a photoelectric conversion unit 12, a porous anode electrode 14, and a non-porous cathode electrode 16.
  • the anode 14 is provided on the side opposite to the light incident side of the photoelectric conversion unit 12.
  • the cathode electrode 16 is provided to face the anode electrode 14.
  • the solar cell 10 is provided with a transparent substrate 18 on the outside of the photoelectric conversion unit 12 and a transparent substrate 19 on the outside of the cathode electrode 16, and is entirely sealed with an appropriate sealing material or sealing member.
  • 2 and 3 show an example of sealing with a sealing material (sealing portion) 20.
  • the cathode electrode 16 may be a laminate of a non-porous material and a porous material. It is sufficient that the sealing material or the sealing member can seal the photoelectric conversion unit 12. As shown in FIGS. 2 and 3, a transparent substrate 18 is provided on the outer surface of the photoelectric conversion unit 12, while the cathode electrode 16 itself is formed of a non-porous metal layer. It can be said that the photoelectric conversion part 12 is sealed by 18 and the cathode electrode 16, and eventually the entire solar cell 10 is sealed. In order to securely seal by a simple method, it is preferable to omit the transparent substrate 18 and the substrate 19 and seal the entire solar cell 10 with the sealing material 20.
  • the solar cell 10 is preferably a dye-sensitized solar cell
  • the photoelectric conversion unit 12 is a porous semiconductor layer that adsorbs a dye and is disposed on the light incident side
  • the anode electrode 14 is a porous that adsorbs the dye.
  • a porous conductor layer provided on the surface opposite to the light incident side of the porous semiconductor layer, the cathode 16 being an anode via an electrolyte layer (not shown in FIGS. 1 to 3) enclosed It is a non-porous conductor layer provided opposite to the electrode 14 or a conductor layer in which a non-porous material and a porous material are laminated.
  • the reason why the anode 14 is porous is to obtain good liquid permeability of the electrolyte between the cathode 16 side and the porous semiconductor layer, or hole or electron conductivity.
  • An insulating layer 22 is preferably provided between the anode 14 and the cathode 16. Thereby, even when the bending force is applied to the solar cell 10, the anode 14 and the cathode 16 can be reliably insulated.
  • a specific configuration of the dye-sensitized solar cell can be applied as it is, and is not essence of the present invention. Note that these configurations can also be applied to a solar cell according to a second example of the present embodiment described later.
  • the anode 14 may be a metal mesh, a metal layer in which numerous holes are formed in advance, or a porous metal layer formed by thermal spraying or thin film formation.
  • the material of the anode electrode 14 is not particularly limited, but Ti, W, Ni, Pt, Ta, Nb, Zr, Au, and the like can be suitably used.
  • the thickness of the anode 14 is not particularly limited, but is preferably 0.2 ⁇ m-600 ⁇ m.
  • the cathode 16 is a catalyst film or a non-porous conductive film laminated on a catalyst film.
  • a noble metal such as platinum, high surface area carbon, or the like can be used.
  • a platinum film is formed by, for example, a sputtering method, a non-porous film is formed, and when high surface area carbon is formed by, for example, a carbon particle printing method, a porous film is formed. In either case, the electrolyte does not leak to the outside due to the presence of the nonporous conductive film.
  • the thickness of the cathode electrode 16 is not particularly limited, but is preferably, for example, about several tens of nm or more from the viewpoint of obtaining good conductivity.
  • an appropriate metal oxide such as TiO 2, ZnO, or SnO 2 can be used as a semiconductor material.
  • the thickness of the porous semiconductor layer is not particularly limited, but is preferably 10 ⁇ m or more.
  • the dye adsorbed on the porous semiconductor layer has absorption at a wavelength of 400 nm to 1200 nm.
  • the electrolyte layer can use a known electrolyte solution or solid electrolyte, and includes, for example, iodine, lithium ion, ionic liquid, t-butylpyridine, etc.
  • iodine it consists of a combination of iodide ions and iodine.
  • a redox form can be used.
  • the electrolyte layer contains an appropriate solvent capable of dissolving these redox substances.
  • the transparent substrate 18 and the substrate 19 may be glass or a transparent resin sheet.
  • the material of the transparent resin sheet is, for example, PP, PE, PS, ABS, PS, PC, PMMA, PVC, PA, POM, PET, PEN, PIB, PVB, PA6, polyimide, polyamide, polyolefin, polyester, polyether, Examples thereof include a cured acrylic resin, a cured epoxy resin, a cured silicone resin, various engineering plastics, and a cyclic polymer obtained by metathesis polymerization.
  • the substrate 19 provided in contact with the cathode electrode 16 does not have to be transparent.
  • the thickness of the substrate 19 is not particularly limited, and can be, for example, 1 ⁇ m to 3 mm.
  • the material of the sealing portion 20 for example, an acrylic resin, an epoxy resin, an ionomer resin, a silicone resin, or the like can be used.
  • the thickness of the sealing portion 20 that seals the substrate 19 is not particularly limited, and can be, for example, 1 ⁇ m to 10 ⁇ m.
  • a non-porous conductor 24 is provided on the side opposite to the light incident side of a part of the electrode of the anode 14, and a first opening formed in the sealing part 20 at a position not overlapping the cathode 16 in plan view. A part of the non-porous conductor portion 24 is exposed from 26 to form the first external connection terminal 28. On the other hand, a part of the electrode of the cathode electrode 16 is exposed from the second opening 30 formed at a position different from the first opening 26 of the sealing portion 20 on the side opposite to the light incident side, and the second external connection. Terminal 32 is used. As a result, the anode 14 and the first external connection terminal 28 are reliably electrically insulated from the cathode 16 and the second external connection terminal 32.
  • the external connection terminals 28 and 32 seem to be largely retracted from the openings 26 and 30, but in reality, the substrate 19 and the sealing portion 20 are thin, and thus the external connection terminals 28 and 28 are thin. , 32 are exposed to a degree sufficient to connect the conductor wiring. If the external connection terminals 28 and 32 are arranged close to each other as shown in FIG. 1, it is preferable in terms of the layout of the conductor wiring connected thereto.
  • the material of the non-porous conductor portion 24 is not particularly limited, but is a metal material such as Ti, W, Ni, Pt, Ta, Nb, Zr and Au, or a compound thereof, or is covered with these. A material is preferred.
  • the following electrodes are used. It can be a structure. For example, as shown in FIG. 4, a notch is formed at a position of the cathode electrode 16 corresponding to a region overlapping with the nonporous conductor portion 24, in other words, a region where the first opening 26 appears (indicated by an arrow A in FIG. 4). ).
  • the area of the cathode electrode 16 that does not overlap the anode electrode 14 in plan view can be made only a cut-out portion, and the overlapping area of the anode electrode 14 and the cathode electrode 16, that is, an effective power generation area can be increased. it can. Further, for example, as shown in FIG. 5, a region where the length dimension L2 of the cathode electrode 16 overlaps with the porous conductor portion 24 rather than the length dimension L1 of the anode electrode 14, in other words, a region where the first opening 26 appears. If it is shortened by this amount, the step of notching the cathode electrode 16 can be omitted.
  • the extraction electrodes that are electrically connected to the anode electrode and the cathode electrode in the conventional solar cell have opposite ends of the cell in plan view, etc.
  • the non-power generation region generated by extending around the battery is eliminated, and the plane area of the battery cell that is the power generation region can be increased accordingly.
  • a planar area of a battery cell that is a power generation region can be secured by 6.56 cm 2 , a part of the cathode electrode is notched in the solar battery 10.
  • the planar area of the battery cell that is the power generation region can be expanded to, for example, 8.38 cm 2 .
  • the planar area of the battery cell as the power generation region is the same as the anode electrode without notches.
  • the area can be as large as, for example, 8.8 cm 2 .
  • the internal structure components such as the photoelectric conversion unit in contact with the porous anode electrode are porous.
  • the solar cell 10 Since it does not substantially communicate with the outside via the quality anode electrode, the contamination of the internal structural components due to the external atmosphere can be reduced.
  • the solar cell 10 is a dye-sensitized solar cell, it can prevent that electrolyte solution leaks outside via a porous anode electrode.
  • the solar cell 10 since the solar cell 10 does not have an extraction electrode in the appearance seen from the light incident side, it is excellent in design.
  • the dye-sensitized solar cell according to the first example of this embodiment can be suitably obtained.
  • the method for manufacturing a dye-sensitized solar cell includes a step (first step) of obtaining a porous anode electrode with a dye-adsorbing porous semiconductor layer provided with a nonporous conductor portion, and a notch A step of obtaining a cathode electrode formed with a cathode (second step), a step of laminating a porous anode electrode with a dye-adsorbing porous semiconductor layer and a cathode electrode (third step), A step of providing at least one of the substrate having the opening formed therein or the sealing resin sheet having the sixth opening formed therein and the seventh opening formed at a position corresponding to the notch (fourth step) ).
  • the slurry-like raw material of the porous anode electrode is coated on a dissolvable substrate by chemical treatment, and the slurry-like raw material is sintered to form a sintered body, and then the substrate is formed by chemical treatment.
  • a dye-adsorbing porous semiconductor layer is formed on the sintered body to obtain a porous anode electrode with a dye-adsorbing porous semiconductor layer, and an anode of a porous anode electrode with a dye-adsorbing porous semiconductor layer
  • a non-porous conductor is laminated at one corner on the pole side.
  • a slurry-like raw material for the porous anode for example, a slurry-like composition in which titanium powder having a particle size of 3 to 40 ⁇ m and an average particle size of 10 ⁇ m is mixed with, for example, an ethylcellulose binder can be used.
  • This slurry-like composition is applied onto a base material, such as iron foil, that can be dissolved by chemical treatment using a metal mask, for example, by a squeegee method (screen printing method), and dried under reduced pressure to obtain a pre-fired shaped body. Thereafter, the molded body before firing is pressed. And this sintered compact is heated together with the iron foil and degreased. Further, firing is performed to obtain a sintered body.
  • the sintered body is immersed in, for example, an aqueous sulfuric acid solution, and the iron foil portion in contact with the sintered body is dissolved to peel the iron foil from the sintered body.
  • the obtained sintered body is repeatedly washed with distilled water or the like to remove sulfuric acid and then dried by heating. Further, for example, a titania paste is printed, dried and fired, and the operation of printing and firing the titania base is repeated a plurality of times to obtain a porous Ti sheet substrate with a titania layer. Furthermore, the non-film-formed portions on the four sides of the porous Ti sheet substrate with a titania layer are removed.
  • a porous Ti sheet substrate with a titania layer prepared is impregnated with a mixed solvent solution of N719 dye acetonitrile and t-butyl alcohol, the dye is adsorbed on the titania surface, and the adsorbed substrate is acetonitrile and t-butyl. Wash with a mixed solvent of alcohol and dry.
  • a titanium foil as a non-porous conductor portion is laminated at one corner on the back side of the porous Ti sheet substrate with the dye-adsorbing titania layer, which is not attached with the non-porous conductor portion. The provided porous anode with a dye adsorbing porous semiconductor layer is obtained.
  • substantially the same plane dimensions as the porous anode electrode with a dye-adsorbing porous semiconductor layer are formed, and the portion corresponding to the nonporous conductor portion is notched when the anode electrode is overlapped with the notched portion.
  • the formed cathode is obtained.
  • platinum is sputtered on one surface of a titanium foil to obtain a Ti substrate with a Pt catalyst layer.
  • a hole for inserting an electrolytic solution is formed in the central portion of the Ti substrate with the Pt catalyst layer, and a portion corresponding to the non-porous conductor portion is cut out when overlapped with the anode electrode to obtain a cathode electrode.
  • a Ti substrate with a carbon catalyst layer in which carbon particles are deposited on one side of a titanium foil may be used.
  • the porous anode electrode and cathode electrode with a dye-adsorbing porous semiconductor layer are aligned with the nonporous conductor portion of the porous anode electrode with the dye-adsorbing porous semiconductor layer and the notch portion of the cathode electrode. Laminate while.
  • a substrate or a sealing resin sheet is provided outside the cathode electrode.
  • the substrate forms a fifth opening at an arbitrary position.
  • the sealing resin sheet is provided together with the substrate, the sealing resin sheet is formed at a position corresponding to the fifth opening.
  • the sealing resin sheet is provided alone, the sealing resin sheet is formed at a position corresponding to the notch while forming the sixth opening at an arbitrary position.
  • a resin sheet for example, a PEN sheet is used, and the substrate is laminated by, for example, a roll press method.
  • a notch is formed at a position corresponding to the notch of the cathode electrode, or a portion that overlaps at least a part of the non-porous conductor in plan view of the PEN sheet is opened by, for example, a drill, and the like A part of the cathode electrode is opened.
  • a thermoplastic adhesive sheet is used as the sealing material.
  • an opening that exposes at least a part of the non-porous conductor part and a part of the cathode electrode to the outside of the cathode electrode is formed.
  • an electrolytic solution of a tetraglyme solvent containing iodine and LiI is injected under reduced pressure from the electrolytic solution insertion hole, and then the electrolytic solution insertion hole is sealed with a UV curable resin to obtain a dye-sensitized solar cell.
  • a solar cell 10a according to a second example of the present embodiment shown in FIGS. 6 to 8 includes a photoelectric conversion unit 12, a nonporous transparent anode electrode 14a, and a nonporous cathode electrode 16.
  • the anode 14 a is provided on the light incident side of the photoelectric conversion unit 12.
  • the cathode electrode 16 is provided to face the anode electrode 14a with the photoelectric conversion unit 12 interposed therebetween.
  • the cathode electrode 16 may be a laminate of a non-porous material and a porous material.
  • the solar cell 10a can be suitably applied to a dye-sensitized solar cell and can also be suitably applied to other thin film solar cells having a transparent conductive film.
  • the solar cell 10 a is provided with a transparent substrate 18 outside the photoelectric conversion unit 12, and is entirely sealed with an appropriate sealing material or sealing member.
  • 7 and 8 show an example of sealing with a sealing material (sealing portion) 20.
  • the solar cell 10 a is sufficient if the sealing material or the sealing member can seal the photoelectric conversion unit 12.
  • a transparent substrate 18 is provided on the outer surface of the nonporous transparent anode electrode 14a, while the cathode electrode 16 itself is formed of a nonporous metal layer.
  • the photoelectric conversion unit 12 is sealed by the transparent substrate 18 and the cathode electrode 16, and eventually the entire solar cell 10 is sealed.
  • the sealing material 20 it is preferable to seal the entire solar cell 10 with the sealing material 20.
  • the solar cell 10 a may be provided with an insulating layer.
  • a well-known one of a dye-sensitized solar cell and other thin film solar cells having a transparent conductive film can be applied as it is, and since it is not the essence of the present invention, a detailed description is omitted. .
  • a part of the anode 14 is exposed from the third opening 26a formed in the sealing part 20 at a position not overlapping the cathode 16 in plan view on the side opposite to the light incident side of a part of the electrode of the anode 14.
  • the third external connection terminal 28a On the other hand, a part of the electrode of the cathode electrode 18 is exposed from a fourth opening 30a formed at a position different from the third opening 26a of the sealing portion 20 on the side opposite to the light incident side, and the fourth external connection. Terminal 32a.
  • the external connection terminals 28a and 32a appear to be largely retracted from the openings 26a and 30a. However, since the sealing portion 20 is actually thin, it is necessary to connect the conductor wiring.
  • the material of the nonporous transparent anode electrode 14a is not particularly limited, and may be, for example, a commonly used ITO (tin doped indium film), FTO (fluorine doped tin oxide film), or SnO 2 film. May be.
  • a metal mesh using an inexpensive metal, a metal layer in which an infinite number of holes are formed in advance, or a metal layer formed by thermal spraying or a thin film forming method can be used.
  • the electrode structure similar to that of the solar cell 10 described above can be used.
  • the manufacturing method of the solar cell 10a can be performed according to the manufacturing method of the dye-sensitized solar cell which concerns on this Example.
  • the extraction electrode electrically connected to each of the anode electrode and the cathode electrode has a plan view.
  • the non-power generation region generated by extending around the battery, such as the opposite ends of the battery is eliminated, and the plane area of the battery cell that is the power generation region can be increased accordingly.
  • the solar cell 10a is substantially free from the outside through the anode electrode, and the internal structure components such as the photoelectric conversion unit in contact with the anode electrode are provided without providing the nonporous conductor 24 that is essential in the solar cell 10. Therefore, the contamination of the internal structural components due to the external atmosphere can be reduced.
  • the solar cell 10a When the solar cell 10a is a dye-sensitized solar cell, it can prevent that electrolyte solution leaks outside via a porous anode electrode. In addition, the solar cell 10a is excellent in the design property since there is no extraction electrode in the appearance seen from the light incident side, like the solar cell 10.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Photovoltaic Devices (AREA)
  • Hybrid Cells (AREA)

Abstract

L'invention concerne une cellule solaire grâce à quoi il est possible de résoudre le problème selon lequel la zone plane efficace de la cellule, qui est une zone de génération d'énergie, est contrainte par suite d'une zone de non génération d'énergie occupée par une structure d'électrode. Une cellule solaire (10) comprend : une unité de conversion photovoltaïque (12) ; une anode poreuse (14) ; et une cathode (16), dans laquelle une cathode non poreuse, ou un matériau non poreux et un matériau poreux, sont empilés. L'anode (14) est située sur le côté opposé d'un côté d'incidence de lumière de l'unité de conversion photovoltaïque (12), et la cathode (16) est agencée de façon à faire face à l'anode (14). Une unité de conducteur non poreux (24) est située sur le côté opposé au côté d'incidence de lumière d'une partie de l'électrode de l'anode (14), et une partie de l'unité de conducteur non poreux (24) est exposée à partir d'une première ouverture (26) formée sur une partie de scellage (20) à une position ne recouvrant pas l'électrode (16) dans une vue du plan, de façon à former une borne de connexion externe (28). Pendant ce temps, une partie de l'électrode de la cathode (16) est exposée à partir d'une seconde ouverture (30) formée à une position différente de la première ouverture (26) de la partie de scellage (20) sur le côté opposé à la partie d'incidence de lumière et forme une seconde borne de connexion externe (32).
PCT/JP2014/058027 2013-03-29 2014-03-24 Cellule solaire et procédé de fabrication de cellule solaire à colorant WO2014157060A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008226554A (ja) * 2007-03-09 2008-09-25 Geomatec Co Ltd 色素増感太陽電池及びこれを備えた複合型機器
JP2009289736A (ja) * 2008-04-28 2009-12-10 Fujikura Ltd 光電変換素子の製造方法、及び、それにより製造される光電変換素子、及び、光電変換素子モジュールの製造方法、及び、それにより製造される光電変換素子モジュール
WO2011135811A1 (fr) * 2010-04-29 2011-11-03 新日鐵化学株式会社 Cellule solaire à colorant et module de cellules solaires à colorant
JP2011243298A (ja) * 2010-05-14 2011-12-01 Panasonic Corp 実装型色素増感太陽電池
JP2012174596A (ja) * 2011-02-23 2012-09-10 Sony Corp 色素増感太陽電池および色素増感太陽電池の製造方法、ならびに色素増感太陽電池モジュール
WO2013005770A1 (fr) * 2011-07-06 2013-01-10 ペクセル・テクノロジーズ株式会社 Élément de conversion photoélectrique de type à sensibilisation par colorant et module de cellule solaire de type à sensibilisation par colorant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008226554A (ja) * 2007-03-09 2008-09-25 Geomatec Co Ltd 色素増感太陽電池及びこれを備えた複合型機器
JP2009289736A (ja) * 2008-04-28 2009-12-10 Fujikura Ltd 光電変換素子の製造方法、及び、それにより製造される光電変換素子、及び、光電変換素子モジュールの製造方法、及び、それにより製造される光電変換素子モジュール
WO2011135811A1 (fr) * 2010-04-29 2011-11-03 新日鐵化学株式会社 Cellule solaire à colorant et module de cellules solaires à colorant
JP2011243298A (ja) * 2010-05-14 2011-12-01 Panasonic Corp 実装型色素増感太陽電池
JP2012174596A (ja) * 2011-02-23 2012-09-10 Sony Corp 色素増感太陽電池および色素増感太陽電池の製造方法、ならびに色素増感太陽電池モジュール
WO2013005770A1 (fr) * 2011-07-06 2013-01-10 ペクセル・テクノロジーズ株式会社 Élément de conversion photoélectrique de type à sensibilisation par colorant et module de cellule solaire de type à sensibilisation par colorant

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