Patent ID: 7598010

Claim:
An electrophotographic photosensitive conductor having a charge transport material that includes a triarylamine dimer derivative represented by the following chemical formula [3] or [4] wherein —R 1 and —R 2 are same or different and are selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 4 carbons, an alkoxyl group having 1 to 4 carbons, and a halogen atom, —R 3 , —R 4 and —R 5 are same or different and are selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 4 carbons, an alkoxyl group having 1 to 4 carbons, a vinyl group, a propenyl group, a butenyl group, an ethynyl group, a propargyl group, a dimethylamino group, a diethylamino group, an imino group, and a halogen atom, m and n are from 0 to 4; wherein the triarylamine dimer derivative is in an amorphous phase.