Directly or through the undercoating layer on purosesuka - toritsuji and the electrophotography

摘要

PROBLEM TO BE SOLVED: To obtain an electrophotographic photoreceptor using a single layer type photosensitive layer superior in chargeability and sensitivity, and rich in the stability of potential characteristics against repeated uses of electrophotographic processes by using a specified compound for an organic electron transfer material. ;SOLUTION: The photosensitive layer contains a charge generating material and an organic positive hole transfer material and the organic electron transfer material dispersed into a binder resin, and the electron transfer material is represented by formula I in which R₁ is a thiophene ring group having a nitro group; each of R₂ and R₃ is an H or halogen atom or an optionally substituted alkyl group or a -(CH₂=CH₂)_p-NO₂ or -(CH₂=CH₂)_q-R₄ group or a group represented by formula II or the like; each of R₄ and R₅ is an aromatic or heterocyclic group substituted by a nitro group; R₆ is an optionally substituted alkyl or aralkyl group; each of (p) and (q) is 1 or 2; and (r) is 0 or 1.;COPYRIGHT: (C)1999,JPO