Patent ID: 8227157

Claim:
A single-layer electrophotographic photoreceptor provided with a single-layer photosensitive layer that adapts to an exposing source emitting a laser beam with wavelengths of from 400 nm to 450 nm inclusive and is laminated on a conductive substrate, the single-layer photosensitive layer comprising: an enamine-type compound that functions as both a charge generation material and a charge transport material and is represented by the general formula (1): wherein a represents a hydrogen atom, a halogen atom or an alkyl group, alkoxy group, dialkylamino group or aryl group, which may have a substituent(s); m represents an integer of 1 to 6, and when m is 1, a represents a hydrogen atom, a halogen atom or an alkyl group, alkoxy group, dialkylamino group or aryl group, which may have a substituent(s); when m represents the integer of 2 or more, a is two or more and each represents a hydrogen atom, a halogen atom or an alkyl group, alkoxy group, dialkylamino group or aryl group, which may have a substituent(s) and may be the same or different, and when a represents 2 or more adjacent alkyl groups, the 2 or more adjacent alkyl groups may bind to each other and form a ring structure; b, c and d may be the same or different, and each represent a hydrogen atom, a halogen atom or an alkyl group, alkoxy group, dialkylamino group, aryl group, aryloxy group or arylthio group, which may have a substituent(s); i j and k may be the same or different, and each represent an integer of 1 to 5, and when i, j or k represents the integer of 2 or more, b, c or d is 2 or more and each may be the same or different, and b, c or d which binds to adjacent carbon atoms of a benzene ring may bind to each other and form a ring structure; and Ar 4 and Ar 5 may be the same or different, and each represent a hydrogen atom or an alkyl group, aryl group, aralkyl group or heterocyclic group, which may have a substituent(s), but may not simultaneously be hydrogen atoms, and may bind to each other by means of an atom or an atom group and form a ring structure; and a perylene-type compound that functions as both an electron-transport material and a sensitizer and is represented by the general formula (2): wherein X represents a hydrogen atom or an alkyl group, alkoxy group or aryl group which may be substituted.