Patent ID: 9029694
Filing Date: 2015-05-12
Classification: C08G,H01G,H01L,Y02E

Abstract:
1. A photoelectric conversion element comprising a substrate, a first electrode, a photoelectric conversion layer, a hole transport layer and a second electrode, wherein the photoelectric conversion layer comprises a semiconductor and a sensitizing dye, the hole transport layer comprises a polymer having a repeat unit represented by Formula (1) or (2), wherein at least one of R 1 -R 4 is a straight chain or a branched chain alkyl group having 1 to 24 carbon atoms, a cycloalkyl group having 3 to 9 carbon atoms, an alkoxy group having 1 to 18 carbon atoms, a polyethylene oxide group having 1 to 18 carbon atoms or an aryl group, and remaining substituent is a hydrogen atom, wherein n is an integer of 1 to 3, m is an integer of 0 to 2n+4, R 5 is a halogen atom or an alkyl group, and when a plurality of R 5 groups are contained, each R 5 group may be different from each other, the polymer has an absorbance of 0.2 to 1.0, and the sensitizing dye has a substructure represented by Formula (3) , wherein R 6 represents a hydrogen atom, a substituted or non-substituted alkyl group, an alkenyl group, an alkynyl group, an aryl group, an amino group, a cyano group or a heterocyclic group, Y represents a sulfur atom, an oxygen atom or a selenium atom, R 7 and R 8 each represents a hydrogen atom, a halogen atom, a hydroxyl group, a thiol group, a cyano group, a substituted or non-substituted alkyl group, an aryl group, an alkenyl group, an alkynyl group, an alkoxy group, an amino group or a heterocyclic group, provided that these groups may be mutually combined to form a ring structure, n represents an integer of 0 or more, and in the case when n≧2, two or more R 7 may be the same or different and two or more R 8 may be the same or different, X represents an acidic group, and, when a carbon-carbon double bond is included in Formula (3), the double bond may be either a cis-form or a trans-form.