METAL-COMPLEX DYE, PHOTOELECTRIC CONVERSION ELEMENT, DYE-SENSITIZED SOLAR CELL, AND DYE SOLUTION CONTAINING METAL-COMPLEX DYE

摘要

A photoelectric conversion element, a photoelectric conversion element, a dye-sensitized solar cell and a dye solution, having an electrically conductive support, a photoconductor layer containing an electrolyte, a charge transfer layer containing an electrolyte, and a counter electrode, wherein the photoconductor layer contains semiconductor fine particles carrying a metal complex dye; and wherein the metal complex dye has at least a carboxyl group and a salt of the carboxyl group, the salt being selected from the group consisting of a potassium salt, a lithium salt, and a cesium salt, and the ratio α of the number of the salt of the carboxyl group divided by the total number of the carboxyl group and the salt of the carboxyl group to be found in one molecule of the metal complex dye, lying in the range of 0.1 to 0.9:

主权项

1. A photoelectric conversion element comprising an electrically conductive support, a photoconductor layer containing an electrolyte, a charge transfer layer containing an electrolyte, and a counter electrode,
wherein the photoconductor layer contains semiconductor fine particles carrying a metal complex dye represented by the following Formula (I); and wherein the metal complex dye has at least a carboxyl group and a salt of the carboxyl group, the salt being selected from the group consisting of a potassium salt, a lithium salt, and a cesium salt, and the ratio α of the number of the salt of the carboxyl group divided by the total number of the carboxyl group and the salt of the carboxyl group to be found in one molecule of the metal complex dye, lying in the range of 0.1 to 0.9: wherein, in Formula (I), M1 represents a Ru atom or an Os atom; Z1 represents a monodentate ligand; the rings Za, Zb and Zc each independently represent a group of nonmetallic atoms necessary for forming a nitrogen-containing 5- or 6-membered ring, provided that at least two rings among the rings formed by Za, Zb and Zc each contain a carboxyl group, or a potassium salt, a lithium salt or a cesium salt of a carboxyl group; the ring Zd represents a group represented by any one of the following Formulas (Zd-1) to (Zd-5); J1 represents a substituent; and ma represents an integer of 0 to 2; wherein, in Formulas (Zd-1) to (Zd-5), R represents an alkyl group which may be substituted with a halogen atom, an aromatic group, or a heterocyclic group; m represents an integer of 0 or more; the symbol “*” represents a binding site with the pyridine ring having J1; and the symbol “**” represents an atom or an atom anion coordinated with M1.