Patent ID: 7429439

Claim:
An electrophotograpbic photoreceptor comprising: a conductive base body; and a photosensitive layer provided on the conductive base body, in which a uniformly charged photosensitive layer is exposed to a light according to image information to form an electrostatic latent image, wherein the photosensitive layer is an outermost layer and free from polysiloxane, and contains an enamine compound represented by the following general formula (1), and a surface free energy (γ) on a surface thereof is in a range of 20.0 mN/m or more and 35.0 mN/m or less; wherein Ar 1 and Ar 2 each represent an optionally-substituted aryl group or an optionally-substituted heterocyclic group; Ar 3 represents an optionally-substituted aryl group, an optionally-substituted heterocyclic group, an optionally-substituted aralkyl group, or an optionally-substituted alkyl group; Ar 4 and Ar 5 each represent a hydrogen atom, an optionally-substituted aryl group, an optionally-substituted heterocyclic group, an optionally-substituted aralkyl group, or an optionally-substituted alkyl group, but it is excluded that Ar 4 and Ar 5 are hydrogen atoms at the same time; Ar 4 and Ar 5 may bond to each other via an atom or an atomic group to form a cyclic structure; “a” represents an optionally-substituted alkyl group, an optionally-substituted alkoxy group, an optionally-substituted dialkylamino group, an optionally-substituted aryl group, a halogen atom, or a hydrogen atom; m indicates an integer of from 1 to 6; when m is 2 or more, then the “a”s may be the same or different and may bond to each other to form a cyclic structure; R 1 represents a hydrogen atom, a halogen atom, or an optionally-substituted alkyl group; R 2 , R 3 and R 4 each represent a hydrogen atom, an optionally-substituted alkyl group, an optionally-substituted aryl group, an optionally-substituted heterocyclic group, or an optionally-substituted aralkyl group; n indicates an integer of from 0 to 3; when n is 2 or 3, then the R 2 s may be the same or different and the R 3 s may be the same or different, but when n is 0, Ar 3 is an optionally-substituted heterocyclic group.