Electrolyte composition for photoelectric conversion device and photoelectric conversion device using the same

a technology of photoelectric conversion device and electrolyte composition, which is applied in the direction of electrolytic capacitor, non-metal conductor, capacitor, etc., can solve the problems of high energy cost of silicon based solar cells, insufficient photoelectric conversion efficiency, and inability to solve the problem of lowering the photoelectric conversion efficiency. , the effect of low viscosity and low viscosity
US20090065058A1Inactive Publication Date: 2009-03-12TOKAI UNIV +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
TOKAI UNIV
Publication Date
2009-03-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

An ionic liquid which is high in ionic conductivity and high in safety without an anxiety of ignition or the like and an electrolyte composition containing the same are provided.The present invention concerns an electrolyte composition for photoelectric conversion device, containing a quaternary phosphonium salt ionic liquid represented by the following formula (1). A viscosity at 25° C. of this ionic liquid is preferably not more than 200 mPa·sec. In the formula (1), it is preferable that the alkoxyalkyl group is a methoxymethyl group, and all of the alkyl groups are an ethyl group.In the formula, R1 represents a linear alkyl group or a branched alkyl group each having from 1 to 6 carbon atoms; R2 represents a methyl group or an ethyl group; n represents an integer of from 1 to 6; and X represents N(SO2CF3)2 or N(CN)2.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to an electrolyte composition for photoelectric conversion device containing a quaternary phosphonium salt ionic liquid and to a photoelectric conversion device using the same.BACKGROUND ART

[0002] A silicon based solar cell using monocrystalline silicon, polycrystalline silicon and amorphous silicon has excellent photoelectric conversion efficiency reaching 20% and is put into practical use as a leading technology of the photovoltaic power generation system. However, this silicon based solar cell is high in energy costs on the manufacture of raw materials and is restricted from the viewpoints of price and material supply and the like. On the other hand, in recent years, a dye sensitization type solar cell proposed by Gratzel, et al. gets attention. This has a structure in which an electrolytic liquid lies between a titanium oxide porous electrode having a sensitizing dye supported thereon and a counter electrode, which makes i...

Claims

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