Patent ID: 9069267
Filing Date: 2015-06-30
Classification: G03G

Abstract:
1. An electrophotographic photosensitive member comprising: a laminated body, and a hole transporting layer formed on the laminated body, wherein the laminated body comprises: a conductive support, an electron transporting layer formed on the support, and a charge generating layer formed on the electron transporting layer, wherein the electron transporting layer comprises a polymerized product of a composition comprising: an electron transporting substance having a polymerizable functional group, a crosslinking agent, and a thermoplastic resin having a polymerizable functional group, wherein the polymerizable functional group is a hydroxy group, a thiol group, an amino group, a carboxyl group, or a methoxy group, wherein a content of the electron transporting substance in the composition is 30% by mass or more and 70% by mass or less with respect to the total mass of the composition, and wherein the laminated body satisfies the following expression (1): where, in the expression (1), R_opt represents impedance of the laminated body measured by the steps of: forming, on a surface of the charge generating layer, a circular-shaped gold electrode having a thickness of 300 nm and a diameter of 10 mm by sputtering, and applying, between the conductive support and the circular-shaped gold electrode, an alternating electric field having a voltage of 100 mV and a frequency of 0.1 Hz while irradiating the surface of the charge generating layer with light having intensity of 30 μJ/cm measuring the impedance, and R_dark represents impedance of the laminated body measured by the steps of: forming, on a surface of the charge generating layer, a circular-shaped gold electrode having a thickness of 300 nm and a diameter of 10 mm by sputtering, and applying, between the conductive support and the circular-shaped gold electrode, an alternating electric field having a voltage of 100 mV and a frequency of 0.1 Hz without irradiating the surface of the charge generating layer with light, and measuring the impedance.