PURPOSE: To enhance photosensitivity and printing resistance by forming an electrophotographic sensitive layer composed of 2 layers of an electrostatic charge generating layer contg. a specified azo pigment and a charge transfer layer on a conductive substrate.
CONSTITUTION: The electrophotographic sensitive layer composed of 2 layers of the charge generating layer contg. the azo pigment represented by the formula, A being a coupler residue, and a charge transfer layer contg. a charge transfer material and the alkali-soluble resin is formed on the conductive substrate 1. As the fundamental structure, the charge generating layer 3 and the charge transfer layer 4 are laminated on the conductive substrate 1 to form the electrophotographic sensitive layer 2. As the coupler of the azo pigment, compds. having a phenolic hydroxyl group, such as phenols and naphthols, and aromatic amino compds. are used, thus permitting high sensitivity and high printing resistance to be obtained.
HASHIMOTO MITSURU
OOTA MASABUMI
SASAKI MASAOMI
