ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

摘要

An electrophotographic photosensitive member includes a conductive base and a single-layer-type photosensitive layer on the conductive base. The photosensitive layer contains a binder resin, a charge generation material, a hole transport material, a fluorine-atom-containing electron transport material, and fluorine-atom-containing resin particles. An amount of the charge generation material in the photosensitive layer is 0.5% by weight or more and less than 2.0% by weight. The charge generation material has a distribution that satisfies Formula (1): 30≦a/b in a thickness direction of the photosensitive layer where a and b are as defined in the specification, and b may be 0. The fluorine-atom-containing electron transport material has a distribution that satisfies Formula (2): 30≦c/d in the thickness direction of the photosensitive layer where c and d are as defined in the specification, and d may be 0.

主权项

1. An electrophotographic photosensitive member comprising:
a conductive base; and a single-layer-type photosensitive layer on the conductive base, the photosensitive layer containing:
a binder resin,a charge generation material,a hole transport material,a fluorine-atom-containing electron transport material, andfluorine-atom-containing resin particles, wherein: an amount of the charge generation material in the photosensitive layer is 0.5% by weight or more and less than 2.0% by weight, the charge generation material has a distribution that satisfies formula (1) in a thickness direction of the photosensitive layer:
30≦a/b  Formula (1)where a represents a concentration of the charge generation material in a region extending ⅓ of a thickness of the photosensitive layer from a surface side of the photosensitive layer, and b represents a concentration of the charge generation material in a region extending ⅔ of the thickness of the photosensitive layer from a conductive-base side of the photosensitive layer and may be 0, and
the fluorine-atom-containing electron transport material has a distribution that satisfies formula (2) in the thickness direction of the photosensitive layer:
30≦c/d  Formula (2)where c represents a concentration of the fluorine-atom-containing electron transport material in the region extending ⅓ of the thickness of the photosensitive layer from the surface side of the photosensitive layer, and d represents a concentration of the fluorine-atom-containing electron transport material in the region extending ⅔ of the thickness of the photosensitive layer from the conductive-base side of the photosensitive layer and may be 0.