Patent ID: 7592113

Claim:
An electrophotographic photosensitive member comprising a support, a charge generation layer containing a charge generating material and a binder resin, provided on the support, and a hole transport layer containing a hole transporting material, provided on the charge generation layer, wherein said charge generation layer contains an acenaphthene compound having a structure represented by the following formula (4): wherein Z 401 and Z 402 each independently represent an oxygen atom, a ═C(CN) 2 group or a ═N Ph group; and R 401 and R 402 each independently represent a hydrogen atom, a halogen atom, a nitro group, a substituted or unsubstituted alkyl group or a substituted or unsubstituted alkoxy group; and wherein the acenaphthene compound having the structure represented by the above formula (4) is contained in said charge generation layer in an amount of from 51% by weight to 80% by weight based on the weight of the binder resin in said charge generation layer.