WO2004059783A1 - 色素増感型光電変換装置およびその製造方法 - Google Patents
色素増感型光電変換装置およびその製造方法 Download PDFInfo
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- WO2004059783A1 WO2004059783A1 PCT/JP2003/015965 JP0315965W WO2004059783A1 WO 2004059783 A1 WO2004059783 A1 WO 2004059783A1 JP 0315965 W JP0315965 W JP 0315965W WO 2004059783 A1 WO2004059783 A1 WO 2004059783A1
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- dye
- photoelectric conversion
- titania
- conversion device
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000001018 xanthene dye Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M14/00—Electrochemical current or voltage generators not provided for in groups H01M6/00 - H01M12/00; Manufacture thereof
- H01M14/005—Photoelectrochemical storage cells
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
-
- 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
- H01G9/2063—Light-sensitive devices comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution comprising a mixture of two or more dyes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M14/00—Electrochemical current or voltage generators not provided for in groups H01M6/00 - H01M12/00; Manufacture 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
- 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 dye-sensitized photoelectric conversion device and a method for manufacturing the same, and is particularly suitable for application to a dye-sensitized solar cell.
- Amorphous silicon-based solar cells also have features such as higher light absorption, a wider selection range of substrates, and easier area enlargement than crystalline silicon-based solar cells, but have a higher photoelectric conversion efficiency. Lower than crystalline silicon solar cells. Furthermore, amorphous silicon solar cells have higher productivity than crystalline silicon solar cells, but require a vacuum process for manufacturing. And the energy burden is still large.
- these solar cells use highly toxic materials such as gallium, arsenic, and silane gas, and therefore have a problem in terms of environmental pollution.
- the sensitizing dye used in the conventional dye-sensitized solar cell described above is used by being adsorbed on porous titania, it is necessary to have an acidic substituent such as carboxylic acid.
- the types of sensitizing dyes have been limited.
- the reason why the acidic substituent is required to support the sensitizing dye on the porous titania is that the adsorption energy of the surface of the porous titania is weak to adsorb the sensitizing dye. This is because an electrostatic interaction must be imparted to the substrate.
- the acidic substituent is introduced into the sensitizing dye, the manufacturing cost of the sensitizing dye is high, and thus the manufacturing cost of the dye-sensitized solar cell has to be increased.
- the sensitizing dyes are likely to associate with each other via the acidic substituent, causing an intermolecular quenching phenomenon of photoexcited electrons.
- the injection efficiency was lowered, and the effect of improving the photoelectric conversion efficiency by introducing the sensitizing dye could not be sufficiently obtained.
- the sensitizing dye has an acidic substituent, which not only limits the types of sensitizing dyes that can be used, but also complicates the production of the sensitizing dye.
- the production cost was high and the improvement of the photoelectric conversion efficiency was limited, so that there was a problem that practical application was difficult.
- the problem to be solved by the present invention is to provide a dye-sensitized photoelectric conversion device which can use any sensitizing dye, is inexpensive to produce and has high photoelectric conversion efficiency, and a method for producing the same. To provide. Disclosure of the invention
- the present inventors have conducted intensive studies to solve the above-mentioned problems of the prior art, and as a result, in order to enable use of a sensitizing dye having no acidic substituent, titania was used in the semiconductor layer. They have found that the use of nanotubes is most effective, and have come up with the present invention.
- a sensitizing dye supported on the titania nanotube, and a dye-sensitized photoelectric conversion device comprising:
- the invention also provides
- a method for producing a dye-sensitized photoelectric conversion device characterized in that a sensitizing dye is carried on the titania nanotube.
- the sensitizing dye carried on the titania nanotubes is not particularly limited as long as it exhibits a sensitizing effect, and may or may not have an acidic substituent.
- the type of the sensitizing dye include, for example, rhodamine] B, xanthene dyes such as rose bengal, eosin, and erythrocin, cyanine dyes such as quinosine, cryptosyanine, and phenosafranine, Basic dyes such as Brillou, Chi-Shin, and Methylene Bull, porphyrin compounds such as chlorophyll, zinc porphyrin, and magnesium vorphyrin, other azo dyes, phthalocyanine compounds, coumarin compounds, and Ru biviridine Examples include complex compounds, anthraquinone dyes, and polycyclic quinone dyes.
- the ruthenium (Ru) biviridine complex compound is particularly preferable because of its high quantum yield, but is not limited thereto, and can be used alone or in combination of two or more. Further, those obtained by adding an acidic group to these dyes may be used.
- the above-mentioned sensitizing dye may be alcohols, nitriles, nitromethane, halogenated hydrocarbons, ethers, dimethyl sulfoxide, amides, N —Methylpyrrolidone, 1,3-Dimethylimidazolidinone, 3 —Metyloxazolidinone, esters, carbonates, ketones, hydrocarbons, water, etc., and immersion of titania nanotubes Or apply a dye solution to the semiconductor layer containing titania nanotubes. The method of cloth is common.
- the sensitizing dye molecules are carried in a large excess on the titania nanotubes, electrons excited by light energy are not injected into the titania nanotubes, reducing the electrolyte and resulting in energy loss. Cause. Therefore, the dye molecules are ideally adsorbed on the titanium nanotube in a single molecule state, and the temperature and pressure at which the dye molecules are supported can be changed as necessary.
- a carboxylic acid such as deoxycholic acid may be added for the purpose of reducing the association between sensitizing dyes.
- an ultraviolet absorber can be used in combination.
- the surface of the titania nanotube carrying the sensitizing dye may be treated with amines.
- the amines include pyridine, 4-tert-butylpyridine, polyvinylpyridine and the like. When these are liquids, they may be used as they are, or may be used after being dissolved in an organic solvent. .
- the diameter of the titania nanotube is not particularly limited as long as it can support a sensitizing dye, but is typically 5 nm or more and 80 nm or less.
- the crystalline form of the titania nanotube is preferably an anatase type.
- a semiconductor layer containing a titania nanotube carrying a sensitizing dye and an electrolyte layer are generally provided between a pair of electrodes facing each other. More specifically, a semiconductor layer and an electrolyte layer are provided between a transparent conductive substrate and a conductive substrate which is a counter electrode of the transparent conductive substrate, and the transparent conductive substrate and the conductive layer are electrically connected to each other by photoelectric conversion. Electric energy is generated between the conductive substrate and the substrate.
- the transparent conductive substrate may be formed by forming a transparent conductive film on a conductive or non-conductive transparent support substrate, or may be formed entirely of a conductive transparent substrate.
- the material of the transparent support substrate is not particularly limited. Various substrates can be used.
- the transparent support substrate preferably has excellent properties such as a barrier property against moisture and gas entering from the outside of the photoelectric conversion device, a solvent resistance, a weather resistance, and the like.
- a transparent inorganic substrate such as quartz or glass; Terephthalate, Polyethylene naphthalate, Polycarbonate, Polystyrene, Polyethylene, Polypropylene, Polyphenylene sulfide, Polyethylene divinylidene, Tetraacetylcellulose, Brominated phenyloxy, Alamides, Polyimides, Polystyrene , Polyarylates, polysulfones, polyolefins, and other transparent plastic substrates, but are not limited thereto.
- the transparent support substrate it is preferable to use a transparent plastic substrate in consideration of workability, light weight, and the like.
- the thickness of the transparent support substrate is not particularly limited, and can be freely selected depending on the light transmittance, the shielding property between the inside and the outside of the photoelectric conversion device, and the like.
- the surface resistance of the transparent conductive substrate is preferably 500 ⁇ / port or less, more preferably 100 ⁇ / port.
- known materials can be used. Specifically, indium tin oxide (ITO), fluorine-doped ITO (FTO), Sn
- ITO indium tin oxide
- FTO fluorine-doped ITO
- Sn Sn
- the present invention is not limited to these, and two or more of these can be used in combination.
- the dye-sensitized photoelectric conversion device is typically configured as a dye-sensitized solar cell.
- the sensitizing dye is dissolved in a solvent such as ethanol.
- a solvent such as ethanol.
- the sensitizing dye quickly penetrates into the titania nanotubes by capillary action.
- the sensitizing dye remains in the titania nanotube, and the sensitizing dye can stably remain in the titania nanotube due to a potential field unique to the inside of the tube. Therefore, it is not necessary to introduce a special acidic substituent into the sensitizing dye.
- the specific surface area of Chita Your nanotubes and 2 7 0 m 2 / g generally the specific surface area of Anata Ze crystals of the porous titania used in the dye-sensitized solar cell (5 0 m 2 / g)
- the amount of the sensitizing dye to be adsorbed also increases, and the photoelectric conversion efficiency can be greatly improved.
- the association between the sensitizing dyes can be suppressed, the intermolecular quenching of photoexcited electrons can be suppressed, and the excited electrons can be efficiently transferred to the titania nanotube. Since the injection can be performed, the photoelectric conversion efficiency can be improved.
- FIG. 1 is a sectional view showing a dye-sensitized solar cell according to one embodiment of the present invention
- FIG. 2 is a sensitizing dye constituting a semiconductor layer of the dye-sensitized solar cell according to one embodiment of the present invention.
- Schematic diagram schematically showing supported titania nanotubes Fig. 3 shows the semiconductor layer of a conventional dye-sensitized solar cell
- FIG. 1 is a schematic diagram schematically showing a sensitizing dye-supporting porous titania.
- a semiconductor layer made of titania nanotubes carrying a ⁇ sensitive element is used.
- the diameter of the titania nanotube is about 5 to 80 nm and the length is usually 50 to 15 nm.
- the wall thickness of this titania nanotube is usually 2 to 10 nm.
- the crystal form of the titania nanotube is an anatase type.
- the titania nanotubes can be prepared by, for example, referring to a known method (Japanese Unexamined Patent Application Publication No. 10-152,233, Japanese Unexamined Patent Application Publication No. It can be obtained by processing.
- the titania powder is immersed in sodium hydroxide concentrated at 13 to 65 wt% and at a temperature of 18 to 180 ° C for 1 to 50 hours.
- the sodium hydroxide concentration is less than 13 wt%, it takes too much time to form a tube, and if it exceeds 65 wt%, it is difficult to form a tube.
- the temperature is lower than 18 ° C, the reaction time for the formation is prolonged, and when the temperature is higher than 160 ° C, it is difficult to form a tube.
- This alkali treatment is preferably carried out under the conditions of a sodium hydroxide concentration of 18 to 55 wt% and a temperature of 50 to 120 ° C, more preferably a sodium hydroxide concentration of 30 to 100%.
- the semiconductor layer composed of titania nanotubes can be converted to an ethanol solution by referring to a known method (Hirano Arakawa, “Latest Technology of Dye-Sensitized Solar Cells” (CMC) p. 45-47 (2001)).
- Dispersed titania nano After mixing the tube with polyethylene oxide (PEO) as a binder and homogenizing it with a planetary ball mill, this mixture is screen-printed, for example, on a fluorine-doped conductive glass substrate (sheet resistance 30 ⁇ / D). It can be manufactured by firing at 450 t.
- PEO polyethylene oxide
- sheet resistance 30 ⁇ / D fluorine-doped conductive glass substrate
- a sensitizing dye is dissolved in an appropriate solvent such as dimethylformamide, and the semiconductor layer composed of titania nanotubes is dissolved in this solution. After the dye is sufficiently impregnated and sufficiently adsorbed in the titer tube of the semiconductor layer, it is taken out, washed if necessary, and dried.
- One or more sensitizing dyes may be carried on the semiconductor layer made of titania nanotubes.
- a semiconductor layer made of the above-described titania nanotube and an electrolyte are interposed between a transparent conductive substrate and a conductive substrate opposite to the transparent conductive substrate. And a layer. Then, when light is transmitted through the transparent conductive substrate, electric energy can be generated between the transparent conductive substrate and the counter electrode conductive substrate by photoelectric conversion.
- the dye-sensitized photoelectric conversion device is typically configured as a dye-sensitized solar cell.
- Figure 1 shows this dye-sensitized solar cell.
- a transparent conductive substrate 1 and a substrate 3 having a conductive film 2 which is a counter electrode of the transparent conductive substrate 1 A semiconductor layer 4 made of titania nanotubes carrying a sensitizing dye and an electrolyte layer 5 are provided, and these are protected by a case 6.
- the transparent conductive substrate 1 and the conductive film 2 are And a current circuit 8 with an ammeter 7 is formed.
- the semiconductor layer 4 made of titania nanotubes carrying a sensitizing dye has, for example, a bundle structure in which titania nanotubes carrying a sensitizing dye are bonded on the outer wall surface.
- the sensitizing dye can be supported not only inside the titania nanotube, but also on the outer wall surface or inside the inter-tube space of the bundle structure.
- FIG. 2 schematically shows a titania nanotube carrying a sensitizing dye.
- the shape of the semiconductor layer 4 made of titania nanotubes carrying a sensitizing dye is not particularly limited, and may be various shapes such as a film shape, a plate shape, a column shape, and a cylindrical shape.
- the transparent conductive substrate 1 may be a transparent substrate provided with a transparent conductive film, or may be a substrate entirely provided with transparency and conductivity.
- the transparent substrate having a transparent conductive film include, for example, a heat-resistant substrate such as glass or a plastic substrate such as polyethylene terephthalate (PET) or the like, such as indium oxide, tin oxide, and tin oxide.
- PET polyethylene terephthalate
- a substrate on which a thin film is formed is used, and as a substrate having a whole of transparency and conductivity, for example, a conductive glass substrate doped with fluorine is used.
- the thickness of the transparent conductive substrate 1 is not particularly limited, but is usually about 0.3 to 5 mm.
- the conductive film 2 is a counter electrode, aluminum, silver, tin and may and optionally Mochiiruko known ones as the counter electrode in the conventional solar cell such as indium, 1 3 - oxidized form Les dot Kusuion such as ion Platinum, rhodium, ruthenium, ruthenium oxide, carbon, and the like, which have a catalytic ability to promote the reduction reaction, are more preferable. These metal films are preferably formed by physical vapor deposition or chemical vapor deposition on the surface of the conductive material.
- the electrolyte layer 5 interposed between the semiconductor layer 4 and the conductive film 2 Any of those that have been used as an electrolyte layer of a solar cell since then can be used arbitrarily. As such, those for example by dissolving the iodine and iodide potassium in a mixed solvent of polypropylene carbonate 2 5 wt% and the carbonic Echiren 7 5 wt 0/0.
- the operating mechanism of this dye-sensitized solar cell is as follows.
- the sensitizing dye carried on the titania nanotube in the semiconductor layer 4 is excited by the light energy, and electrons are generated.
- the transparent conductive substrate 1 and the conductive film 2 are connected by the current circuit 8, the generated electrons flow to the conductive film 2 through the titania nanotubes in the semiconductor layer 4. Thereby, electric energy can be extracted from between the transparent conductive substrate 1 and the conductive film 2.
- the dye-sensitized solar cell having the above structure is irradiated with simulated sunlight (AM (Air Mass) 1.5: 100 mW / cm 2 ) from the transparent conductive substrate 1 side, for example, It is possible to generate power with a high photoelectric conversion efficiency of 0.0% or more. Since the photoelectric conversion efficiency depends on the thickness of the semiconductor layer 4, the state of the semiconductor layer 4, the state of adsorption of the sensitizing dye, the type of the electrolyte layer 5, and the like, it is further improved by selecting these optimum conditions. be able to.
- the semiconductor layer 4 made of titania nanotubes since the semiconductor layer 4 made of titania nanotubes is used, when the semiconductor layer 4 is immersed in a solution in which an arbitrary sensitizing dye is dissolved in a solvent such as ethanol, the sensitizing dye becomes It quickly penetrates into the interior of the titania nanotube by capillary action. Thereafter, when the solvent is removed, the sensitizing dye remains in the titania nanotube, and the sensitizing dye can stably remain in the titania nanotube due to a potential field unique to the tube, and a special acidic substituent is added to the sensitizing dye. Introduce There is no need to
- the specific surface area of the titania nanotube and 2 7 0 m 2 / g more generally the specific surface area of Anata Ze crystals of the porous titania used in the dye-sensitized solar cell (5 0 m 2 / g)
- the amount of the sensitizing dye to be adsorbed also increases, and the photoelectric conversion efficiency can be greatly improved.
- the association between the sensitizing dyes can be suppressed, the intermolecular quenching phenomenon of photoexcited electrons can be suppressed, and the excited electrons can be efficiently transferred to the titania nanotube. Since the injection can be performed, the photoelectric conversion efficiency can be improved.
- the sensitizing dyes supported on the titania nanotubes are adsorbed at positions away from each other without associating, and thus the photoexcited electrons generated when light enters the sensitizing dyes The intermolecular quenching phenomenon is suppressed.
- FIG. 3 schematically shows the state in which a sensitizing dye is carried on a porous titania thin film in a conventional dye-sensitized solar cell using a porous titania thin film for the semiconductor layer. .
- the sensitizing dyes are associated with each other to form an aggregate.
- the process for producing the sensitizing dye is simplified, which not only makes it possible to greatly reduce the cost of producing the sensitizing dye, but also reduces the acid substituent. Removal of restrictions on introduction makes it easier to introduce unknown new sensitizing dyes.
- titania nanotubes were carried out as follows with reference to Japanese Patent Application Laid-Open No. H10-152523.
- Commercially available crystalline titania (average particle size: 20 nm, specific surface area: 5 O m 2 / g) was immersed in a 40 wt% aqueous sodium hydroxide solution and reacted at 110 ° C. for 20 hours in a closed container.
- titania nanotube pastes as follows.
- the titania nanotubes were dispersed in an ethanol solution so that the content of the titania became 1 lwt%, PEO having a molecular weight of 500,000 was added to the solution, and the mixture was uniformly mixed with a planetary ball mill to increase viscosity.
- a nanotube paste was obtained.
- the obtained titania nanotube paste was applied on a fluorine-doped conductive glass substrate (sheet resistance 30 mm / D) at a size of 1 cm x 1 cm by a screen printing method, and then 450 ° C. C. for 30 minutes, and the titananotube paste was sintered on a conductive glass substrate to form a titania nanotube film.
- Single Jishia sulfonates ruthenium (N) was prepared by dissolving dimethylformamide ⁇ Mi de each 5 X 1 0 one 4 M
- the titania nanotube film was immersed in the solution, allowed to stand at 80 ° C. for 12 hours, washed with methanol in an argon atmosphere, and dried.
- c is one bis dyes having an acidic Moto ⁇ conversion ((4, 4 '- dicarboxylic acid) 2, 2' - Bibirijin) one di Xia sulfonates ruthenium (N 3) at 5 X 1 0- 4 M, respectively
- the titania nanotube membrane was immersed in a solution prepared by dissolving in ethanol, allowed to stand at 80 ° C. for 12 hours, washed with methanol in an argon atmosphere, and dried.
- a counter electrode As a counter electrode, a substrate having ITO and a platinum film having a thickness of 10 attached by a sputtering method was used, and 0.38 g of iodine and 2.49 g of potassium iodide were used as electrolytes.
- the mixture using a solution of a mixture 3 0 g of propylene carbonate sulfonate 2 5 wt 0/0 ethylene carbonate 7 5 wt 0/0, the dye-sensitized type structure as shown in FIG. 1 with A solar cell was fabricated.
- the titania paste was fabricated as follows with reference to Hironori Arakawa, "Latest Technologies for Dye-Sensitized Solar Cells” (CEM-) p. 45-47 (2001). 125 ml of titanium isopropoxide was slowly added dropwise to 750 ml of a 0.1 M nitric acid aqueous solution while stirring at room temperature. After dropping, transfer to a constant temperature bath at 80 ° C and stir for 8 hours. As a result, a cloudy translucent sol solution was obtained. The sol solution was allowed to cool to room temperature, filtered through a glass filter, and then adjusted to 700 ml.
- the obtained sol solution was transferred to an autoclave, subjected to hydrothermal treatment at 220 ° C. for 12 hours, and then subjected to dispersion treatment by ultrasonic treatment for 1 hour. Next, this solution was concentrated at 40 ° C. by an evaporator to prepare a titania content of 11% by weight. Add 500,000 molecular weight PEO to this concentrated sol solution, The mixture was evenly mixed with a mill to obtain a thickened titania paste.
- the obtained titania paste is applied on a fluorine-doped conductive glass substrate (sheet resistance: 30 / port) at a size of 1 cm x 1 cm by a screen printing method, and then is heated to 450 ° C for 30 minutes. While holding, the titania paste was sintered on a conductive glass substrate to form a porous titania film.
- cis-bis ((4,4'-dicarboxylic acid) 2,2'-bipyridine) -disocyanate ruthenium (N 3) is used as a dye having an acidic substituent at 5 ⁇ 10 4 M
- the porous titania film was immersed in a solution prepared by dissolving in ethanol, allowed to stand at 80 ° C. for 12 hours, washed with ethanol in an argon atmosphere, and dried.
- the dye-sensitized solar cells of Examples and Comparative Examples produced as described above were operated using simulated sunlight (AM 1.5, 100 mW / cm 2 ) as a light source.
- the results are shown in Table 1.
- the short-circuit current means the current measured by short-circuiting the opposing electrodes
- the open-circuit voltage means the voltage generated by opening the opposing electrodes
- the photoelectric conversion efficiency is It is expressed by the following equation.
- one embodiment of the present invention has been specifically described.
- the present invention is not limited to the above-described embodiment, and various modifications based on the technical idea of the present invention are possible.
- any sensitizing dye can be used.
- any sensitizing dye can be used.
- the production cost of a sensitizing dye can be reduced, thereby reducing the production cost of a dye-sensitized photoelectric conversion device. it can.
- titania nanotubes have a very large specific surface area, and the use of a sensitizing dye having no acidic substituent can suppress the association between sensitizing dyes. Conversion efficiency can be improved.
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US8035185B2 (en) * | 2003-03-26 | 2011-10-11 | Sony Corporation | Electrode, method of making same, photoelectric transfer element, method of manufacturing same, electronic device and method of manufacturing same |
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TWI229457B (en) | 2005-03-11 |
JP2004207012A (ja) | 2004-07-22 |
AU2003289069A1 (en) | 2004-07-22 |
KR20050088131A (ko) | 2005-09-01 |
US20060084257A1 (en) | 2006-04-20 |
TW200414553A (en) | 2004-08-01 |
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