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Dye-sensitized solar cell

A technology for solar cells and pigments, applied in the field of pigment-sensitive solar cells, can solve the problems of weak ionic bond and chemical bond, property change, low conductivity, etc.

Inactive Publication Date: 2005-10-12
DAI ICHI KOGYO SEIYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] However, in photoelectric conversion devices using the cross-linked polyether monomers listed in JP-A-8-236165, JP-9-27352 and JP-A-2000-306605, due to the use of free radicals Polymerization proceeds monomer cross-linking, so there is a problem that polymerization is hindered if iodine used in dye-sensitive solar cells is present in the monomer before cross-linking
In addition, since iodine is injected after polymerization, it is difficult to quantify the iodine concentration in the electrolyte
[0016] In addition, the gel electrolyte of JP-A-2002-63813 contains a low-molecular-weight, uncrosslinked ether compound as a solvent. Although the ether compound has low volatility compared with low-boiling point solvents, due to its low conductivity, when used in large amounts, there will be The problem of reduced conductivity of gel electrolyte
In addition, the compound that forms a network structure may even contain a substance with a very high molecular weight. For example, the polyether listed in the examples has a molecular weight of 1 million or more. If it is such a high molecular weight material, the precursor solution before crosslinking is difficult to obtain. To TiO 2 There is a problem that it is difficult to cover the surface uniformly due to the movement of the semiconductor layer such as
[0017] In addition, the conversion efficiency of the electrolyte in JP-A-2000-228234 is insufficient
[0018] In addition, the electrolyte in JP-A-2000-323190 is obtained by alkylating or quaternizing the nitrogen atom of a nitrogen-containing heterocyclic ring with an electrophile and cross-linking with an ionic bond. The ionic bond is weaker than the chemical bond, so There is a problem of changing properties due to the influence of heat, light, etc.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0079] A dye-sensitive solar cell using a gel electrolyte containing a molten salt was fabricated by the following method, and its conversion efficiency was evaluated.

[0080] figure 2 (a) to (c) are cross-sectional views of dye-sensitive solar cells in the order of fabrication. exist figure 2 Among them, symbol 1 denotes a transparent substrate, symbol 2 denotes a transparent conductive film, symbol 3 denotes a titanium oxide film as a porous semiconductor layer, symbol 4 denotes a spacer, symbol 5 denotes a platinum film, symbol 6 denotes a conductive substrate, and symbol 7 denotes a Gel electrolyte layer.

[0081] Vacuum evaporation is used to form SnO on a transparent substrate 1 made of glass. 2 To form the transparent conductive film 2, the titanium oxide film 3 was formed on the transparent conductive film 2 by the following method.

[0082] As the titanium oxide suspension for forming the titanium oxide film 3, a commercially available titanium oxide suspension...

Embodiment 1-2

[0094] Mix molten salt 1-butylpyridinium tetrafluoroborate and diluting solvent acetonitrile / ethylene carbonate / propylene carbonate=2 / 2 / 6 (volume ratio) with weight ratio 6 / 4, obtain in mixing Iodine and lithium iodide were added to the solution to obtain a solution having an iodine concentration of 0.05M / lithium iodide concentration of 0.1M. In 45.2 g of this solution, 1.3 g of trimethylolpropane-modified toluene diisocyanate (manufactured by Nippon Polyurethane Industry Co., Ltd., trade name: Coronet L) as compound A and polyetheramine (HUNTSMAN Produced by the company, trade name: Geoffa-Min T-5000, molecular weight 5000) 10 g, to prepare a monomer solution.

Embodiment 1-3

[0096] Iodine was added to molten salt 1-hexyl-3-methylimidazolium iodide / 1-ethyl-3-methylimidazolium tetrafluoroborate = 1 / 1 (weight ratio) to obtain a 0.05M iodine solution. In 295 g of this solution, 10.5 g of a compound synthesized by the following synthesis method 1-2 as compound A and 5 g of polyetheramine (manufactured by HUNTSMAN, trade name: Geoffamine T-5000) as compound B were dissolved to prepare a recipe. body solution.

[0097] (synthesis method 1-2)

[0098] 92 g of glycerol as the initial material, 30 g of potassium hydroxide as a catalyst, 5,950 g of ethylene oxide and 3,970 g of propylene oxide were charged into the reaction vessel, and after reacting for 10 hours at 130° C., neutralization and dehydration were carried out. An ethylene oxide-propylene oxide copolymer with a molecular weight of 10,000 was obtained. 5.3 g of toluene diisocyanate and 0.05 g of dibutyltin dilaurate as a catalyst were added to 100 g of the prepared compound, and reacted at 80° C...

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Abstract

As an electrolyte of dye-sensitized solar cell, use is made of a network structure produced by crosslinking of compound A having at least one isocyanate group and compound B having at least one amino group or compound C having at least one carboxyl group and / or hydroxyl group wherein a molten salt is contained and wherein at least one of the compounds A to C is one having a polymeric structure of 500 to 100,000 molecular weight, the polymeric structure partially or wholly comprised of one, or two or more members selected from the group consisting of polyethers, polyesters, polycaprolactones, polysiloxanes, polyvinylpyrrolidones, polycarbonates and polyphosphazenes. Not only improvement of long-term stability of safety and performance but also simplification of production process can be attained by the employment of the above structure.

Description

technical field [0001] The present invention relates to a dye-sensitive solar cell, and more specifically, to a dye-sensitive solar cell using an electrolyte containing a molten salt in a network structure formed by crosslinking a compound having a specific structure. Background technique [0002] Dye-sensitive solar cells have attracted much attention because they show high conversion efficiency among organic solar cells. As a semiconductor layer composed of a photoelectric conversion material that can be used in this dye-sensitive solar cell, a semiconductor layer in which a spectrosensitizing dye absorbing in the visible light range is adsorbed on the semiconductor surface has been used. [0003] For example, Japanese Patent No. 2664194 describes a dye-sensitive solar cell using a metal oxide semiconductor layer having a spectrally sensitizing dye composed of a transition metal complex adsorbed on the surface of the semiconductor layer. . [0004] In addition, Japanese ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/12H01G9/20H01M14/00
CPCH01G9/2031H01G9/2009H01B1/122Y02E10/542H01M14/005Y02P70/50
Inventor 古宫良一山中良亮韩礼元见立武仁石古惠理子河野通之
Owner DAI ICHI KOGYO SEIYAKU CO LTD
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