Patent ID: 7718760

Claim:
A π-conjugated polymer comprising: a repeating unit, wherein the repeating unit is expressed by the following General Formula (I): where, in the General Formula (I), Y represents a divalent group selected from one of a substituted or unsubstituted triphenylamine structure and a substituted or unsubstituted thiophene, Ar represents a divalent group selected from one of a substituted or unsubstituted aromatic hydrocarbon and a substituted or unsubstituted aromatic heterocyclic ring, Y 1 represents one of a substituted or unsubstituted unsaturated aliphatic hydrocarbon, a substituted or unsubstituted aromatic hydrocarbon and a substituted or unsubstituted divalent group of aromatic heterocyclic ring and R represents one of a hydrogen atom, a substituted or unsubstituted alkyl group and a substituted or unsubstituted aromatic hydrocarbon group.