| 主权项 |
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 Ar1 is an aryl group, or a heterocyclic group having a conjugated double bond, Ar2 is an aryl group, and Ar1 and Ar2 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 R1-R10 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 R11 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. |
