Photoelectric conversion element, dye-sensitized solar cell, metal complex dye, dye composition, and oxide semiconductor electrode

A photoelectric conversion element comprising:

• a conductive support;
• a photoconductor layer including an electrolyte;
• a charge transfer layer including an electrolyte;
• and
• a counter electrode,
• wherein the photoconductor layer has semiconductor fine particles carrying a metal complex dye represented by Formula (2A),
• in Formula (2A), M represents a metal ion,
• R1A and R2A each independently represent a group represented by Formula (4),
• RP1A and RP2A each independently represent an alkyl group, an alkoxy group, an alkylthio group, an aryl group, a heteroaryl group, an amino group, or a halogen atom, and
• nP1A and nP2A are each independently an integer of 0 to 3,
• X1A and X2A each independently represent a monodentate ligand, and
• M1A and M2A each independently represent any one of a proton, a metal cation, or a non-metal cation,
• in the formula (4), L1 represents a single bond or an ethenylene group,
• Ar11 and Ar12 each independently represent an aryl group having at least one substituent selected from the following substituent group SAr, an unsubstituted heteroaryl group, or a heteroaryl group having at least one substituent selected from the following substituent group SAr,
• provided that in a case where L1 is an ethenylene group and the aryl group has an alkyl group as the substituent, the alkyl group is a linear alkyl group having 3 or more carbon atoms or a branched alkyl group, and in a case where L1 is an ethenylene group and the aryl group has a mono- or dialkylamino group as the substituent, at least one alkyl group in the alkylamino group is a linear alkyl group having 5 or more carbon atoms or a branched alkyl group,
• R11 represents an alkyl group, an alkoxy group, an alkylthio group, an aryl group, a heteroaryl group, an amino group, or a halogen atom, and n11 is an integer of 0 to 4, and
• represents a bonding moiety to a pyridine ring in Formula (2A),
• <Substituent Group SAr>
• an alkyl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an aryl group, a heteroaryl group, an amino group, a halogen atom, or a cyano group.

A dye composition comprising a metal complex dye represented by Formula (1) and a metal complex dye represented by Formula (2),

• in the formulae, M represents a metal ion,
• R1 and R2 each independently represent an alkenyl group, an alkynyl group, an aryl group, or a heteroaryl group,
• RP1 and RP2 each independently represent an alkyl group, an alkoxy group, an alkylthio group, an aryl group, a heteroaryl group, an amino group, or a halogen atom, and nP1 and nP2 are each independently an integer of 0 to 3,
• X1 and X2 each independently represent a monodentate ligand, and
• M1 and M2 each independently represent any one of a proton, a metal cation, or a non-metal cation.

A metal complex dye represented by Formula (2A),

• in Formula (2A), M represents a metal ion,
• R1A and R2A each independently represent a group represented by Formula (4),
• RP1A and RP2A each independently represent an alkyl group, an alkoxy group, an alkylthio group, an aryl group, a heteroaryl group, an amino group, or a halogen atom, and nP1A and nP2A are each independently an integer of 0 to 3,
• X1A and X2A each independently represent a monodentate ligand, and
• M1A and M2A each independently represent any one of a proton, a metal cation, or a non-metal cation,
• in Formula (4), L1 represents a single bond or an ethenylene group,
• Ar11 and Ar12 each independently represent an aryl group having at least one substituent selected from the following substituent group SAr, an unsubstituted heteroaryl group, or a heteroaryl group having at least one substituent selected from the following substituent group SAr,
• provided that in a case where L1 is an ethenylene group and the aryl group has an alkyl group as the substituent, the alkyl group is a linear alkyl group having 3 or more carbon atoms or a branched alkyl group, and in a case where L1 is an ethenylene group and the aryl group has a mono- or dialkylamino group as the substituent, at least one alkyl group in the alkylamino group is a linear alkyl group having 5 or more carbon atoms or a branched alkyl group,
• R11 represents an alkyl group, an alkoxy group, an alkylthio group, an aryl group, a heteroaryl group, an amino group, or a halogen atom, and n11 is an integer of 0 to 4, and
• represents a bonding moiety to a pyridine ring in Formula (2A),
• <Substituent Group SAr>
• an alkyl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an aryl group, a heteroaryl group, an amino group, a halogen atom, or a cyano group.