Patent ID: 7129012
Filing Date: 2006-10-31
Classification: G03G

Abstract:
1. An electrophotographic photosensitive member, comprising: a support; a charge generation layer containing a charge generation substance, the charge generation layer being placed on the support; and a hole transport layer containing a hole transport substance, the hole transport layer being placed on the charge generation layer, wherein the charge generation substance is hydroxygallium phthalocvanine, and the charge generation layer further comprises an electron transport substance having a reduction potential in a range of −0.54 to −0.25 V, and the thickness of the charge generation layer is in a range of 0.12 to 0.20 μm, wherein the following expression (I) is satisfied for said electrophotographic photosensitive member: wherein V wherein V wherein d, in units of μm, represents the thickness of the hole transport layer; and wherein the following expression (II) is satisfied: wherein V wherein when the electrophotographic photosensitive member is rotated 5 times while the surface of the electrophotographic photosensitive member is charged by means of the charging device set to the charging condition C