WO2005020335A1 - 光電変換素子 - Google Patents
光電変換素子 Download PDFInfo
- Publication number
- WO2005020335A1 WO2005020335A1 PCT/JP2004/011423 JP2004011423W WO2005020335A1 WO 2005020335 A1 WO2005020335 A1 WO 2005020335A1 JP 2004011423 W JP2004011423 W JP 2004011423W WO 2005020335 A1 WO2005020335 A1 WO 2005020335A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- semiconductor
- photoelectric conversion
- forming
- film
- conductive
- Prior art date
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 57
- 239000004065 semiconductor Substances 0.000 claims abstract description 147
- 239000000758 substrate Substances 0.000 claims abstract description 67
- 239000004020 conductor Substances 0.000 claims abstract description 25
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 63
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 58
- 238000000034 method Methods 0.000 claims description 56
- 229910052751 metal Inorganic materials 0.000 claims description 34
- 239000002184 metal Substances 0.000 claims description 33
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 27
- 239000010936 titanium Substances 0.000 claims description 27
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- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000010407 anodic oxide Substances 0.000 claims description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 5
- 229910052758 niobium Inorganic materials 0.000 claims description 5
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- 230000032683 aging Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
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- 238000001354 calcination Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 1
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- 238000010884 ion-beam technique Methods 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- JLRJWBUSTKIQQH-UHFFFAOYSA-K lanthanum(3+);triacetate Chemical compound [La+3].CC([O-])=O.CC([O-])=O.CC([O-])=O JLRJWBUSTKIQQH-UHFFFAOYSA-K 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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- 238000001465 metallisation Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
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- 150000002790 naphthalenes Chemical class 0.000 description 1
- 239000000978 natural dye Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical group [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 125000005499 phosphonyl group Chemical group 0.000 description 1
- 239000001007 phthalocyanine dye Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 150000004032 porphyrins Chemical class 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- UKDIAJWKFXFVFG-UHFFFAOYSA-N potassium;oxido(dioxo)niobium Chemical compound [K+].[O-][Nb](=O)=O UKDIAJWKFXFVFG-UHFFFAOYSA-N 0.000 description 1
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- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
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- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 150000004771 selenides Chemical class 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- GROMGGTZECPEKN-UHFFFAOYSA-N sodium metatitanate Chemical compound [Na+].[Na+].[O-][Ti](=O)O[Ti](=O)O[Ti]([O-])=O GROMGGTZECPEKN-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 150000004772 tellurides Chemical class 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- GAJQCIFYLSXSEZ-UHFFFAOYSA-L tridecyl phosphate Chemical compound CCCCCCCCCCCCCOP([O-])([O-])=O GAJQCIFYLSXSEZ-UHFFFAOYSA-L 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- GSURLQOINUQIIH-UHFFFAOYSA-N triheptyl phosphate Chemical compound CCCCCCCOP(=O)(OCCCCCCC)OCCCCCCC GSURLQOINUQIIH-UHFFFAOYSA-N 0.000 description 1
- SFENPMLASUEABX-UHFFFAOYSA-N trihexyl phosphate Chemical compound CCCCCCOP(=O)(OCCCCCC)OCCCCCC SFENPMLASUEABX-UHFFFAOYSA-N 0.000 description 1
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 1
- ZOPCDOGRWDSSDQ-UHFFFAOYSA-N trinonyl phosphate Chemical compound CCCCCCCCCOP(=O)(OCCCCCCCCC)OCCCCCCCCC ZOPCDOGRWDSSDQ-UHFFFAOYSA-N 0.000 description 1
- QJAVUVZBMMXBRO-UHFFFAOYSA-N tripentyl phosphate Chemical compound CCCCCOP(=O)(OCCCCC)OCCCCC QJAVUVZBMMXBRO-UHFFFAOYSA-N 0.000 description 1
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- RXPQRKFMDQNODS-UHFFFAOYSA-N tripropyl phosphate Chemical compound CCCOP(=O)(OCCC)OCCC RXPQRKFMDQNODS-UHFFFAOYSA-N 0.000 description 1
- 239000001018 xanthene dye Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- 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
- H10K30/10—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising heterojunctions between organic semiconductors and inorganic semiconductors
- H10K30/15—Sensitised wide-bandgap semiconductor devices, e.g. dye-sensitised TiO2
- H10K30/151—Sensitised wide-bandgap semiconductor devices, e.g. dye-sensitised TiO2 the wide bandgap semiconductor comprising titanium oxide, e.g. TiO2
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/0248—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies
- H01L31/036—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes
- H01L31/0392—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes including thin films deposited on metallic or insulating substrates ; characterised by specific substrate materials or substrate features or by the presence of intermediate layers, e.g. barrier layers, on the substrate
-
- 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
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/06—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by potential barriers
- H01L31/07—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by potential barriers the potential barriers being only of the Schottky type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- 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
- 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 a novel photoelectric conversion element using a semiconductor sensed with a dye.
- an inexpensive oxide semiconductor such as titanium oxide can be used without purification to a high degree of purity, so that an inexpensive photoelectric conversion element can be provided. This has the advantage that light in almost the entire wavelength range can be converted into electricity.
- Tan et al. As shown in Fig. 1, sandwiched titanium oxide 2 between a supporting substrate, titanium electrode 1 and gold electrode 3, and then coated a dye molecule layer 4 on the gold electrode surface.
- Reported dye-sensitized photoelectric conversion device As shown in Fig. 1, sandwiched titanium oxide 2 between a supporting substrate, titanium electrode 1 and gold electrode 3, and then coated a dye molecule layer 4 on the gold electrode surface.
- Non-Patent Document 2 In this device, one surface of the titanium oxide forms a Schottky junction with gold, and the other surface forms an ohmic junction with titanium.
- the dye layer adsorbed on the gold surface is oxidized by photoexcitation, and the excited electrons flow across the Schottky barrier between gold and titanium oxide and flow from the dye layer to titanium oxide, while the oxidized dye flows from the gold layer. Because it is automatically regenerated by supplying electricity, there is no need to use an electrolyte and the durability of the material is excellent, so conventional dye-sensitive solar cells There is a possibility that an element having higher practicality can be manufactured as compared with. However, on the other hand, there is a problem that the short-circuit current density is very small at present.
- the surface area per unit area of the semiconductor film of this device increases, the amount of sensitizing dye adsorbed increases, so that the current value increases and the photoelectric conversion efficiency can be improved. If a thick and porous oxide semiconductor film can be formed on a substrate, a highly practical dye-sensitized photoelectric conversion element having high conversion efficiency and excellent impact resistance can be manufactured.
- the present invention has been made in view of such a situation, and an all-solid-state dye-sensitized photosensitive film having a large roughness factor formed on a substrate surface at a low cost, a high short-circuit current density, and excellent durability. It is an object to provide a conversion element.
- the present invention includes, on one surface of a semiconductor, a conductive substrate forming an ohmic junction with the semiconductor, and on the other surface, a conductive film forming a Schottky junction with the semiconductor,
- a photoelectric conversion element having a structure in which a sensitizing dye layer is provided on the conductive film, wherein a roughness factor of a side surface of the semiconductor on which a Schottky junction is formed is 5 or more.
- the value of a Schottky barrier between the semiconductor and the conductive film forming a Schottky junction is 0.2 eV to 2.5 eV. It relates to a conversion element.
- the present invention relates to the photoelectric conversion element, wherein the semiconductor is an oxide semiconductor.
- the present invention also relates to the photoelectric conversion element, wherein the oxide semiconductor is titanium oxide, tantalum oxide, niobium oxide, or zirconium oxide.
- the conductive substrate forming an ohmic junction with the semiconductor may be made of a metal selected from titanium, tantalum, niobium and zirconium, an alloy mainly containing these metals, or an oxide of these metals.
- the present invention provides a step of forming a semiconductor that forms an ohmic junction with a conductive substrate on a conductive substrate, a step of increasing a roughness factor of a semiconductor surface on a side where a Schottky junction is formed to 5 or more, and a step of increasing the roughness factor to 5 or more.
- the present invention relates to a method for manufacturing a photoelectric conversion element.
- the present invention provides a step of increasing a roughness factor of one surface of a semiconductor to 5 or more, and a step of increasing a roughness factor of 5 or more in a step of forming a conductive substrate which is in ohmic contact with the other surface of the semiconductor.
- the present invention provides a method for forming a semiconductor that forms an ohmic junction with a conductive substrate on a conductive substrate and a step of increasing roughness roughness of the semiconductor surface on the side where a Schottky junction is formed to 5 or more. And a method for producing a photoelectric conversion element, which is carried out by forming an anodic oxide film by anodizing in an electrolytic solution.
- FIG. 2 is a schematic cross-sectional view showing one example of the photoelectric conversion element of the present invention.
- the semiconductor 5 forms an ohmic junction with the conductive substrate 6 on one surface and the conductive film 7 and the Schottky on the other surface. It has a configuration in which one junction is formed and the sensitizing dye layer 4 is provided on the conductive film 7.
- the electrical conductivity at room temperature and the semiconductor is an intermediate of 1 0 3 ⁇ 1 0 _ 1 G S / cm order of material of the metal and an insulator, with the support of the charge e
- Some n-type semiconductors, p-type semiconductors that are holes, or both electrons and holes It is an intrinsic semiconductor that becomes the body.
- the shape of the semiconductor any shape such as a single crystal, a polycrystal, and a film is possible.
- Semiconductors include inorganic semiconductors, such as silicon, germanium, and other elemental semiconductors composed of Group IV elements in the periodic table; IV-based compound semiconductors; and metal chalcogenides (eg, oxides, sulfides, selenides).
- a compound having a perovskite structure eg, strontium titanate, calcium titanate, sodium titanate, barium titanate, potassium niobate, etc.
- an organic semiconductor such as a perylene derivative or a phthalocyanine derivative
- Inorganic semiconductors can be either n- type or p-type, or both.
- the semiconductor is doped with an element other than its constituent elements.
- Such a semiconductor becomes conductive (p-type or n-type) when the added impurity replaces some of the constituent elements of the semiconductor.
- an element having one less outermost electron number than that of the constituent element to be replaced is selected as an impurity.
- An element having one more electron is selected as an impurity.
- I b _ nib-VI b 2 group compound semiconductor is added V b group element in order to obtain a p-type, the 1 llb group element in order to obtain the n-type as the impurity It is known to do.
- mb-Vb-based compound semiconductors such as GaN, a Group ⁇ a element is used as an impurity to obtain a P-type, and a Group IVb element is used as an impurity to obtain an n-type.
- a Vb group element is used as an impurity to obtain a p-type
- a 1 VHb group element is used as an impurity to obtain an n-type
- the n-type inorganic semiconductor include sulfides of cadmium, zinc, lead, silver, antimony, or bismuth, oxides such as titanium oxide, Si, SiC, and GaAs. Power is not limited to this.
- the p-type inorganic semiconductor include tellurides such as CdTe, compound semiconductors containing monovalent copper such as Si, SiC, GaAs, and CuI, GaP, NiO, Co, and the like.
- O, F e O, B i 2 0 3, Mo 0 2, C r 2 0 but 3 or the like is Ru and the like, but is not limited thereto.
- N-type organic semiconductors include perylene pigments and their derivatives (a variety of derivatives having different substituents attached to the nitrogen atom are known), naphthalene derivatives (perylene pigments whose perylene skeleton is naphthalene), C 6 . (Also called fullerene) And the like, but are not limited thereto.
- P-type organic semiconductors include phthalocyanine pigments and their derivatives (metal phthalocyanines with various metals M in the center, phthalocyanines without metals, and those with various substitution groups around them), quinatalidone pigments, porphyrins And merocyanine and derivatives thereof, but are not limited thereto.
- the work function ⁇ is defined as the minimum energy required to extract one electron from the surface just outside the surface.
- the intrinsic Fermi level E F is defined as the energy at which a probability of existence of an electron at each level is 1 Z 2, that is, the density of electrons and vacancies is equal at a certain temperature.
- the semiconductor is an n- type semiconductor, an ohmic junction is formed when its intrinsic Fermi level E F n is approximately equal to or smaller than the work function ⁇ of the conductive material.
- the ohmic junction is a junction between two substances that generates a current according to the potential difference according to Ohm's law.
- a Schottky junction is formed when the intrinsic Fermi level E F n of an n- type semiconductor is larger than the work function ⁇ of the conductive material.
- the Schottky junction means that a potential barrier is created at the interface between the conductive material and the n-type semiconductor for electrons of the n-type semiconductor, and a potential difference greater than the barrier is required for electrons to flow into the metal. It is a joint state of two substances, such as In the case of a p-type semiconductor, an ohmic junction is formed when the intrinsic Fermi level E F p is almost the same as or larger than the work function ⁇ of the conductive material, and a Schottky junction is formed when the work function is small. .
- the electromotive force of the photoelectric conversion element is determined by the height ⁇ ⁇ of the Schottky barrier after the semiconductor and the conductive material form a Schottky junction. If the value of ⁇ is too large, the proportion of sunlight that can be absorbed by the corresponding dye decreases, and if the value of ⁇ is too small, sufficient electromotive force cannot be obtained, and the corresponding dye emits light. When absorbed, the recombination probability of charges increases. Therefore, in the present invention, the value of ⁇ is preferably from 0.2 eV to 2.5 eV, more preferably from 0.4 eV to 1.5 e in order to obtain sufficient photoelectric conversion element performance. V.
- the work function of a conductive material is determined by a conventionally known method, for example, a method of obtaining the temperature dependence of the current due to the emission of thermoelectrons from the conductive material, and the limit of the current due to photoelectrons generated when a solid is irradiated with light. From wavelength or other work function known It can be known by a method or the like obtained from the contact potential difference with the solid.
- the intrinsic level of the semiconductor is almost equal to one position of the lower limit energy of the conduction band in the case of an n- type semiconductor, and almost equal to the position of the upper limit energy of the valence band in the case of a p-type semiconductor. It can be estimated from the upper limit energy and the energy gap.
- the height of the Schottky barrier is theoretically equal to the difference ⁇ between the Fermi level inherent in the semiconductor and the work function of the conductive material, but in fact depends greatly on the structure and quantity of the semiconductor surface quasi-f Therefore, rather than estimating the height of the Schottky barrier from the difference between the inherent Fermi level of the semiconductor and the work function of the conductive material, the semiconductor and the metal are joined together, and then the potential difference between the two substances is given. , By measuring the current flow. Specifically, the height ⁇ of the Schottky barrier corresponds to a potential difference at which a current flows.
- ohmic junction when a potential difference is applied between two materials, according to Ohm's law, when a current corresponding to the applied potential difference flows, an ohmic junction is formed.
- the values of ohmic junction, Schottky junction, and ⁇ are determined and estimated by giving a potential difference between the two materials after joining and measuring the current flow at that time. Things.
- n-type oxide semiconductor examples include oxides of titanium, tin, zinc, iron, tungsten, zirconium, hafnium, stotium, indium, cerium, yttrium, lanthanum, vanadium, niobium, and tantalum. However, it is more preferable to use oxides of titanium, tantalum, niobium, and zirconium. Uses n-type oxide semiconductor as semiconductor! In that case, a material that has a small work function and forms an ohmic junction with the oxide semiconductor is used for the conductive substrate.
- titanium oxide when titanium oxide is used as an oxide semiconductor, lithium, sodium, magnesium, aluminum, potassium, calcium, scandium, titanium, vanadium, manganese, zinc, gallium, arsenic, rubidium, strontium, yttrium, zirconium , Niobium, silver, cadmium, indium, cesium, norium, lanthanum, hafnium, tantalum, thallium, lead, bismuth and other metals and alloys, compounds, metal oxides such as tin and zinc, and other metal elements the indi were lightly doped um tinoxiae (IT_ ⁇ (I n 2 0 3: S n)), fluorinedoped Materials such as a conductive film made of a metal oxide such as tinoide (F TO (S n0 2 : F)) and aluminum oxide doped zinc oxide (AZO (Z nO: A 1)) can be given.
- IT_ ⁇ I n 2 0 3: S n
- titanium oxide it is preferable to use titanium, an alloy mainly containing titanium, or a transparent conductive film.
- tantalum oxide, niobium oxide, or zirconium oxide the metal or an alloy mainly containing the metal is used.
- a transparent conductive film it is preferable to use a transparent conductive film.
- the photoelectric conversion element of the present invention has a conductive substrate forming an ohmic junction with a semiconductor on one surface of a semiconductor and a conductive film forming a Schottky junction with the semiconductor on the other surface.
- Such a photoelectric conversion element includes, for example, a step of forming a semiconductor that forms an ohmic junction with a conductive substrate on a conductive substrate, a step of increasing the roughness factor of the semiconductor surface on the side where a Schottky junction is formed to 5 or more, a roughness factor Forming a conductive film by bonding a conductive material that forms a Schottky junction therewith to a semiconductor surface having a value of 5 or more, and a step of forming a sensitizing dye layer on the conductive film. It is manufactured by a method including:
- Another method for manufacturing the photoelectric conversion element of the present invention includes a step of increasing a roughness factor of one surface of a semiconductor to 5 or more, a step of forming a conductive substrate that is in ohmic contact with the other surface of the semiconductor, Forming a conductive film by bonding a conductive material that forms a Schottky junction with the semiconductor surface having the factor increased to 5 or more, and forming a sensitizing dye layer on the conductive film.
- a method for joining the semiconductor and the conductive substrate to form an ohmic junction with one surface of the semiconductor 5 and the conductive substrate 6 a method of forming a semiconductor film on the conductive substrate or a method of forming a conductive substrate on the semiconductor Of forming a conductive film as a substrate.
- the thickness of the conductive substrate is not particularly limited as long as the surface conductivity is not impaired, and the surface resistance is preferably in the range of 1,000 ⁇ / sq. Or less, more preferably ⁇ ⁇ ⁇ / sq. sa.
- a vapor deposition method such as a vacuum evaporation method, a chemical vapor deposition method, and a sputtering method
- a liquid coating method such as a spin coating method, a dip coating method, and a liquid phase growth method are used.
- Phase method, solid phase method such as thermal spraying method or solid phase reaction, heat treatment method to form oxide film by heat treatment on metal surface of conductive substrate, method of applying semiconductor fine particle colloid to conductive substrate, anodic oxidation And the like.
- the anodic oxidation method uses the metal on the conductive substrate surface as an anode and any conductive material as a cathode in various aqueous solutions, and applies a voltage to electrochemically oxidize the metal on the anode side to form a conductive substrate surface.
- This is a method of forming an oxide of the metal with a thickness of several ⁇ m on the substrate.
- the adhesion between the substrate and the oxide is strong, the electrical connection is excellent, and the deposition rate is higher than other oxide film manufacturing methods.
- a semiconductor in the case where a metal oxide of a conductive substrate is used as a semiconductor, a semiconductor can be obtained by directly anodizing the conductive substrate. In other cases, a semiconductor can be obtained on a conductive substrate by forming a reduced metal of a semiconductor on a conductive substrate by a method such as vacuum evaporation on the surface and anodizing the reduced metal.
- a conductive film 7 of Schottky junction is formed on the other surface of the semiconductor 5.
- the value of the roughness factor of the surface of the semiconductor on the side of the Schottky junction is 5 or more.
- the semiconductor surface roughness factor is the ratio of the actual surface area to the apparent area, or projected area.
- Roughness factors can be measured by methods such as the method of determining from the adsorption of gas molecules such as nitrogen, the method of calculating from the surface adsorption amount of coloring molecules such as dyes, and the method of obtaining from the surface shape measurement such as AFM (atomic force microscope). No.
- the value of the roughness factor largely depends on the short-circuit current value of the photoelectric conversion element.
- the value of the roughness factor is 5 or more, preferably 10 or more, more preferably 20 or more, and further preferably 50 or more.
- the upper limit is not particularly limited, but is usually at most 300, preferably at most 2,000.
- Methods for increasing the value of the roughness factor of the semiconductor surface include a gas phase method such as a method of etching a semiconductor by an ion beam method, a method of photoelectrochemical etching, a vacuum evaporation method, a chemical evaporation method, and a sputtering method.
- a gas phase method such as a method of etching a semiconductor by an ion beam method, a method of photoelectrochemical etching, a vacuum evaporation method, a chemical evaporation method, and a sputtering method.
- Spin coating Using a liquid phase method such as dip coating and liquid phase growth, and a solid phase method such as thermal spraying and solid phase reaction, semiconductors are deposited on the surface of a porous material with a large roughness factor.
- Examples include, but are not limited to, a method of forming, a method of removing a porous material after forming a semiconductor on a surface of a porous material having a large roughness factor, a method of applying a semiconductor fine particle colloid, and an anodizing method. Not something.
- a colloidal solution containing semiconductor fine particles and a small amount of an organic polymer is applied to a conductive substrate, dried, and then heat-treated at a high temperature to form an organic polymer.
- the value of the roughness factor can be increased.
- a step of forming a semiconductor for forming an ohmic junction with the conductive substrate on a conductive substrate and a step of increasing the roughness factor of the semiconductor surface to 5 or more can be performed simultaneously.
- the metal on the conductive substrate surface is used as the anode, and any conductive material is used as the cathode.
- the metal on the anode side is electrochemically oxidized and the conductive substrate surface is thickened.
- An oxide film having a thickness of um and an oxide of the metal is formed, and the roughness factor is set to 5 or more.
- an alkaline aqueous solution such as sodium hydroxide, sulfuric acid, hydrofluoric acid, phosphoric acid, hydrogen peroxide or a mixed acid thereof, or an aqueous solution in which glycerol phosphate and metal acetate are dissolved are preferable.
- the glycerol phosphate include sodium glycerate phosphate and calcium glycerate phosphate, and sodium glycerate phosphate is more preferable because it is very soluble in water.
- Any metal acetate can be used, but especially alkali metal acetate, alkaline earth metal acetate, and lanthanum acetate are very soluble in the aqueous solution of dali cerophosphate, and stable at high voltage. It is more preferable because it can be anodized.
- Examples of a method for forming a conductive film on a semiconductor surface by bonding a conductive material on a semiconductor having a surface roughness factor of 5 or more include an electrolytic plating, an electroless plating, a metal deposition method (sputtering, ion plating). (Including coating and CVD), a method of attaching metal colloid to the surface, a method of sintering after applying a paste of a paint containing conductive material, a method of applying a paste of a paint containing conductive material, and reduction calcination.
- a method of sintering, a method of coating a compound containing a conductive material by vapor deposition, followed by sintering or reduction sintering, a method combining these operations, or the like can be used.
- the metal colloid has a diameter of 100 nm or less, preferably 100 nm or less. Positively charged metal colloids tend to adhere well to oxide semiconductors, and the use of a colloid makes it easy to adhere metals to inorganic compounds.
- a conductive material which has a large work function and forms a Schottky junction with the oxide semiconductor is preferably used.
- titanium oxide as an oxide semiconductor
- beryllium, boron, carbon, silicon, chromium, iron, cobalt, nickel, copper, germanium, selenium, molybdenum, ruthenium, rhodium, palladium, antimony, tellurium, tungsten , Rhenium, osmium, iridium, platinum, gold, mercury, copper and other metals and their alloys or their compounds are preferably used, but not limited thereto.
- the thickness of the conductive film to be formed is not particularly limited as long as it does not hinder electron transfer from the sensitizing dye layer 4 to the semiconductor 5, but is preferably 1 nm to 200 nm, more preferably. Or 1 0 ⁇ ⁇ ! In the range of ⁇ 50 nm.
- the lower the surface resistance of the conductive film, the better, and the preferable range of the surface resistance is 100 ⁇ / sq. Or less, more preferably 100 ⁇ / sq. Or less.
- the sensitizing dye layer 4 is provided on the conductive film 7.
- Dye sensitization of a semiconductor is defined as the physical and chemical response of a semiconductor caused by light, which is caused by the adsorption of a dye onto the surface and spreads to the absorption wavelength region of the dye, and is then defined.
- sensitizing dyes Various semiconductors and dyes can be used as the sensitizing dye layer.
- the oxidized / reduced form of the dye is stable, and the potential of the excited electrons in the light absorbing layer and the hole potential generated by photoexcitation in the light absorbing layer are important. It is necessary that the light absorption edge energy of the sensitizing dye has energy equal to or higher than the Schottky barrier formed by the semiconductor and the conductive film.
- the UMO potential and the conduction potential of the semiconductor are higher than the conduction potential of the n-type semiconductor, and the hole potential generated by photoexcitation in the light absorbing layer is higher than the Fermi level after the n-type semiconductor and the conductive film are joined. Also need to be low.
- the semiconductor is a p-type semiconductor
- the hole potential generated by photoexcitation in the light absorbing layer is lower than the valence level of the p-type semiconductor, and the LUMO potential of the photoexcited dye and the conduction charge potential of the semiconductor are lower. It is necessary that the level be higher than the Fermi level after the p-type semiconductor and the conductive film are joined. Reducing the recombination probability of excited electron-holes near the light-absorbing layer is also important for increasing the photoelectric conversion efficiency.
- an i-type amorphous semiconductor having a large light absorption coefficient, a direct transition semiconductor, or a fine particle semiconductor exhibiting a quantum size effect and efficiently absorbing visible light is preferable.
- Dyes that can be used as the sensitizing dye layer are preferably metal complex dyes, organic dyes, and natural dyes. Those having a functional group such as a carboxyl group, a hydroxyl group, a sulfonyl group, a phosphonyl group, a sulfoxylalkyl group, a hydroxyalkyl group, a sulfolalkyl group, or a phosphoralkyl group in a dye molecule are preferred. Used. Metal complex dyes include ruthenium, osmium, iron, cobalt, zinc, mercury complexes (for example, mercury chrome), metal phthalocyanines, and chlorophyll. Etc. can be used.
- organic dyes examples include cyanine dyes, hemicyanine dyes, merocyanine dyes, xanthene dyes, triphenylmethane dyes, and metal-free phthalocyanine dyes, but are not limited thereto. is not.
- one or more kinds of semiconductors, metal complex dyes and organic dyes, or two or more kinds of colorants can be mixed in order to widen the wavelength range of photoelectric conversion as much as possible and increase the conversion efficiency.
- the dyes to be mixed and their proportions can be selected so as to match the intended light source wavelength range and intensity distribution.
- a method for attaching the dye to the conductive film a method in which a solution obtained by dissolving the dye in a solvent is applied to the conductive film by spray coating / spin coating or the like, and then dried.
- the substrate may be heated to an appropriate temperature.
- a method in which a conductive film is immersed in a solution and adsorbed can be used.
- the immersion time is not particularly limited as long as the dye is sufficiently adsorbed, but is preferably 1 to 30 hours, particularly preferably 5 to 20 hours.
- the solvent and the substrate may be heated when immersing as needed.
- the concentration of the dye in a solution is; 1100 mm0, preferably about 10 to 500 mm1 / 1.
- the solvent used is not particularly limited, but water and an organic solvent are preferably used.
- the organic solvent include alcohols such as methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, and t-butanol, acetonitrile, propionitrile, methoxypropionitrile, and glutaronitrile.
- Nitrile solvents ketones such as benzene, toluene, o-xylene, m-xylene, ⁇ -xylene, pentane, heptane, hexane, cyclohexane, heptane, acetone, methyl ethyl ketone, getyl ketone, and 2-butanone; Getinoleatenole, Tetrahydrofuran, Ethylene carbonate, Propylene carbonate, Metromethane, Dimethinolephonoremamide, Dimethinoresnorreoxide, Hexamethylphosphonamide, Dimethoxetane, y-butyrolact Ton, ⁇ -valerolactone, sulfolane, dimethoxetane, adiponitrile, methoxyacetonitrile, dimethylacetamide, methylpyrrolidinone, dimethylsulfoxide, dioxolan, sul
- the oxide semiconductor 5 is formed on the conductive substrate 6 whose surface is mirror-finished, and the oxide semiconductor 5 is incident from the dye layer side, and the conductive substrate 6 reflects light.
- the photoelectric conversion element of the present invention is preferably coated on the whole or on a part other than the substrate.
- a resin or the like can be used as the coating material.
- the coating material is preferably translucent.
- a photoelectric conversion element having a large short-circuit current by increasing the amount of dye adsorbed.
- a photoelectric conversion element having a simple manufacturing procedure and excellent characteristics such as an all-solid-state type and mechanical strength can be provided.
- the dye-sensitized photoelectric conversion device was manufactured by the following procedure. First, a titanium substrate measuring 5 x 5 cm and a thickness of 1 mm was prepared, and one side was masked with epoxy resin. Thereafter, electropolishing was performed using a mixed solution of methanol and sulfuric acid, and the surface was mirror-finished. After electropolishing, observe the surface shape with AFM (atomic force microscope). As a result, a very smooth surface structure was confirmed. The roughness factor at this time was 1.04.
- titanium oxide was formed by anodizing titanium at 10 V for 30 minutes in an aqueous solution of hydrofluoric acid having a concentration of 0.5 mass%.
- the temperature of the electrolyte solution was set at 16 ° C.
- the obtained titanium oxide film was subjected to a heat treatment at 500 ° C. for 30 minutes in the atmosphere to form a crystalline titanium oxide film.
- This film was an anatase type crystal and had a film thickness of ⁇ 2 O O nm, confirming its porous shape.
- a potential was applied between the titanium of the substrate and the formed titanium oxide film, a current value corresponding to the potential difference was observed, and it was confirmed that the junction between the two was an ohmic junction.
- the obtained titanium oxide film was immersed in a 4 ⁇ 10-4 mo 1/1 ethanol solution of an organic dye, rhodamine B, and allowed to stand for 24 hours to allow rhodamine B to be adsorbed on the titanium oxide film.
- the roughness factor was calculated by calculating the amount of roughness factor, the roughness factor was 50.
- This photoelectric conversion element 1 0 OmW / cm 2 of irradiation with artificial sunlight of light intensity was measured electromotive force, the short circuit current per 1 cm 2 is about 0. 7 mA, the open-circuit voltage 0.6 3 V.
- the dye-sensitized photoelectric conversion device was manufactured by the following procedure. First, prepare a titanium substrate with a size of 5 x 5 cm and a thickness of 1 mm, and use epoxy resin on one side. More protected. Thereafter, electropolishing was performed using a mixed solution of methanol and sulfuric acid, and the surface was mirror-finished. After electropolishing, the surface shape was observed by AFM (atomic force microscope), and a very smooth surface structure was confirmed. The roughness factor at this time was 1.04.
- a titanium oxide film was formed by anodizing titanium at 20 V for 20 minutes in an aqueous solution of hydrofluoric acid having a concentration of 0.5 mass%.
- the temperature of the electrolyte solution was set at 16 ° C.
- the obtained titanium oxide film was subjected to a heat treatment at 500 ° C. for 30 minutes in the atmosphere to form a crystalline titanium oxide film.
- This film was an anatase type crystal, the film thickness was 2 OO nm, and it was confirmed that the film had a tubular shape.
- a potential was applied between the titanium on the substrate and the formed titanium oxide film, a current value corresponding to the potential difference was observed, confirming that the junction between the two was an ohmic junction.
- the obtained titanium oxide film was immersed in a 4 ⁇ 10 14 mo 1/1 ethanol solution of rhodamine B, which is an organic dye, and allowed to stand all day and night to adsorb rhodamine B on the titanium oxide film.
- 1 X 10- 2 mo 1 was immersed an acid titanium film on an aqueous sodium hydroxide solution of Z 1, to desorb Rhodamine B, from the absorbance of the solution of Rhodamine B adsorbed on the titanium oxide film The amount of roughness was calculated and the roughness factor was calculated. The roughness factor was 32.
- This photoelectric conversion device was measured electromotive force was irradiated with artificial sunlight of light intensity of 10 OmWZcm 2, was short circuit current per 1 cm 2 is about 0. 6 mA, the open-circuit voltage is 0. 62 V . (Example 3)
- the dye-sensitized photoelectric conversion device according to the present invention was manufactured by the following procedure. First, a glass substrate with ITO having a size of 5 x 5 cm and a thickness of 3 mm was prepared, and titanium was laminated on the ITO to a thickness of 1,000 nm by vacuum evaporation. When the surface shape was observed by AFM (atomic force microscope), a very smooth surface structure was confirmed. The roughness factor at this time was 1.02.
- titanium deposited in an aqueous electrolyte solution composed of sulfuric acid having a concentration of 1.5mo11 and hydrogen peroxide having a concentration of 0.3mo1 / 1 was anodized by constant current electrolysis until the voltage became 150V.
- the current density was set to 30 mA / cm 2
- the temperature of the aqueous electrolyte solution was set to 16 ° C.
- the obtained titanium oxide film was a rutile type crystal, the film thickness was 4000 nm, and a porous shape was confirmed.
- the obtained titanium oxide film was immersed in a 4 ⁇ 10 14 mo 1/1 ethanol solution of rhodamine B, which is an organic dye, and allowed to stand all day and night to adsorb rhodamine B on the titanium oxide film.
- rhodamine B which is an organic dye
- the roughness factor was calculated by calculating the amount of roughness, the roughness factor was 120.
- the dye-sensitized photoelectric conversion device was manufactured by the following procedure. First, a single crystal of rutile-type titanium oxide having a size of 1 ⁇ 1 cm and a thickness of 0.2 mm and having an expanded (001) plane was prepared. When the surface shape was observed by AFM (atomic force microscope), a very smooth surface structure was confirmed. The roughness factor at this time was 1-01.
- the photoelectric conversion element was irradiated with simulated sunlight having a light intensity of 10 OmWZ cm 2 and the electromotive force was measured.
- the short-circuit current per cm 2 was about 0.8 mA, and the open-circuit voltage was 0.65 V. there were" (Comparative Example 1)
- a titanium substrate with a size of 5 x 5 cm and a thickness of l mm was prepared, and one side was protected with epoxy resin. Thereafter, electropolishing was performed using a mixed solution of methanol and sulfuric acid, and the surface was mirror-finished. When the surface shape was observed by AFM (atomic force microscope), a very smooth surface structure was confirmed. The roughness factor at this time was 1.04.
- the titanium plate was baked at 500 ° C. for 3 hours to form a titanium oxide film on the surface of the titanium plate.
- This film was a mixture of anatase and rutile crystals and maintained a flat surface profile.
- a potential was applied between titanium on the substrate and the formed titanium oxide film, a current value corresponding to the potential difference was observed, confirming that the junction between the two was an ohmic connection.
- the obtained titanium oxide film was immersed in a 4 ⁇ 10 4 mo 1/1 ethanol solution of rhodamine B, an organic dye, and allowed to stand all day and night to adsorb rhodamine B on the titanium oxide film.
- 1 X 1 0- 2 mo 1 was immersed an acid titanium film on an aqueous solution of sodium hydroxide Z 1, to desorb Rhodamine B, from the absorbance of the solution, Rhodamine B adsorbed on the titanium oxide film
- the roughness factor was calculated by calculating the amount of roughness factor, the roughness factor was 2.8.
- the photoelectric conversion element was irradiated with simulated sunlight to measure the electromotive force.
- the short-circuit current per cm 2 was about 20 / A, and the open-circuit voltage was 0.63 V.
- FIG. 1 is a cross-sectional view showing a conventional photoelectric conversion element.
- FIG. 2 is a schematic sectional view showing an example of the photoelectric conversion element of the present invention.
- FIG. 3 is a schematic sectional view showing another example of the photoelectric conversion element of the present invention.
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Abstract
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EP04771410A EP1659639A4 (en) | 2003-08-26 | 2004-08-03 | PHOTOELECTRIC CONVERSION ELEMENT |
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US20130255761A1 (en) * | 2010-06-17 | 2013-10-03 | Polymers Crc Ltd. | Electrode and dye-sensitized solar cell |
JP5681607B2 (ja) * | 2011-03-28 | 2015-03-11 | 株式会社東芝 | 光電変換素子 |
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US20220285640A1 (en) * | 2019-12-24 | 2022-09-08 | Panasonic Intellectual Property Management Co., Ltd. | Solar cell |
US11696456B2 (en) * | 2019-12-24 | 2023-07-04 | Panasonic Intellectual Property Management Co., Ltd. | Solar cell |
Also Published As
Publication number | Publication date |
---|---|
EP1659639A4 (en) | 2011-07-27 |
AU2004302345A1 (en) | 2005-03-03 |
CN1856883A (zh) | 2006-11-01 |
EP1659639A1 (en) | 2006-05-24 |
US20060137737A1 (en) | 2006-06-29 |
JP2005072367A (ja) | 2005-03-17 |
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