Electrolyte for photoelectric conversion element, photoelectric conversion element using the electrolyte, and dye-sensitized solar cell using the electrolyte

Patent metadata

Field	Value
Publication number	US-9287056-B2
Application number	US-201113818334-A
Country	US
Kind code	B2
Filing date	Aug 25, 2011
Priority date	Aug 25, 2010
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

An object of the present invention is to provide an electrolyte for a photoelectric conversion element that can achieve superior moisture resistance. The electrolyte for a photoelectric conversion element of the present invention is an electrolyte for a photoelectric conversion element which contains an organic salt compound (A) and a lamellar clay mineral (B), wherein the above-mentioned organic salt compound (A) contains more than 50 mass %, in terms of cationic weight, of an organic salt compound (a1) having a specific cation.

First claim

What is claimed is:

1. An electrolyte for a photoelectric conversion element comprising:
an organic salt compound (A) having a cation represented by formula (1) or (2) below, and a lamellar clay mineral (B), wherein
the organic salt compound (A) comprises more than 50 mass %, in terms of cationic weight, of an organic salt compound (a1), and
the organic salt compound (a1) is: a compound in which at least one of R 2 , R 3 and an optional substituent group on R 1 in formula (1) below is a hydrocarbon group having from 5 to 20 carbon atoms and optionally having a hetero atom, or a compound in which at least one of R 4 , R 5 , R 6 and R 7 in formula (2) below is a hydrocarbon group having from 5 to 20 carbon atoms and optionally having a hetero atom:

wherein, in formula (1), R 1 is a hydrocarbon group having from 1 to 20 carbon atoms and optionally having a hetero atom, and may include a substituent having from 1 to 20 carbon atoms and optionally having a hetero atom; R 2 and R 3 are each independently a hydrogen atom or a hydrocarbon group having from 1 to 20 carbon atoms and optionally having a hetero atom; however, the R 3 moiety is absent if the nitrogen atom contains a double bond;
in formula (2), Q is a nitrogen atom, an oxygen atom, a phosphorus atom or a sulfur atom, and R 4 , R 5 , R 6 and R 7 are each independently a hydrogen atom or a hydrocarbon group having from 1 to 20 carbon atoms and optionally having a hetero atom; however, the R 7 moiety is absent if Q is an oxygen atom or a sulfur atom and, if Q is a sulfur atom, R 4 and R 5 may be linked, and

the organic salt compound (A) comprises less than or equal to 50 mass % in terms of cationic weight, of an organic salt compound (a2), and
the organic salt compound (a2) is a compound in which the hydrocarbon groups represented by R 2 and R 3 in formula (1) above are hydrocarbon groups having from 1 to 4 carbon atoms and optionally having a hetero atom, or a compound in which the hydrocarbon groups represented by R 4 , R 5 , R 6 and R 7 in formula (2) above are hydrocarbon groups having from 1 to 4 carbon atoms and optionally having a hetero atom;
and either or both of the organic salt compound (a1) and organic salt compound (a2) has a thiocyanate anion.

2. The electrolyte for a photoelectric conversion element according to claim 1 , wherein a content of the organic salt compound (a1) in the organic salt compound (A) is 90 mass % or less in terms of cationic weight.

3. The electrolyte for a photoelectric conversion element according to claim 1 , wherein the lamellar clay mineral (B) comprises an alkylsilyl group.

4. The electrolyte for a photoelectric conversion element according to claim 1 , further comprising an organic solvent (C) having a boiling point of 150° C. or higher and a relative dielectric constant of 20 or higher.

5. The electrolyte for a photoelectric conversion element according to claim 2 , wherein the lamellar clay mineral (B) comprises an alkylsilyl group.

6. The electrolyte for a photoelectric conversion element according to claim 3 , further comprising an organic solvent (C) having a boiling point of 150° C. or higher and a relative dielectric constant of 20 or higher.

Assignees

• Maruyama Tsukasa
• Yokohama Rubber Co Ltd

Inventors

• Maruyama Tsukasa

Classifications

• H01B1/122 Primary

  Ionic conductors · CPC title

• H01G9/2004 Primary

  characterised by the electrolyte, e.g. comprising an organic electrolyte · CPC title

• H01G9/2059

  comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution · CPC title

• H01G9/2031

  comprising titanium oxide, e.g. TiO2 (H01G9/2036 takes precedence) · CPC title

• Y02E10/542

  Dye sensitized solar cells · CPC title