Patent ID: 8980507
Filing Date: 2015-03-17
Classification: G03G

Abstract:
1. A positively chargeable monolayer electrophotographic photosensitive member comprising: a conductive substrate; and a photosensitive layer provided on the conductive substrate and having a monolayer structure containing a charge generating material, a hole transport material, an electron transport material, and a binder resin, wherein the hole transport material contains a triarylamine derivative represented by a following formula (1): where Ar 1 is an aryl group, or a heterocyclic group having a conjugated double bond, Ar 2 is an aryl group, and Ar 1 and Ar 2 are optionally substituted by one or more groups selected from the group consisting of alkyl group having 1-6 carbon atoms, alkoxy group having 1-6 carbon atoms, and phenoxy group, and the electron transport material contains at least one compound selected from the group consisting of compounds represented by following formulas (2)-(4): where each of R 1 -R 10 is independently a group selected from the group consisting of hydrogen atom, optionally substituted alkyl group, optionally substituted alkenyl group, optionally substituted alkoxy group, optionally substituted aralkyl group, optionally substituted aromatic hydrocarbon group, and optionally substituted heterocyclic group, and R 11 is a group selected from the group consisting of halogen atom, hydrogen atom, optionally substituted alkyl group, optionally substituted alkenyl group, optionally substituted alkoxy group, optionally substituted aralkyl group, optionally substituted aromatic hydrocarbon group, and optionally substituted heterocyclic group.