Konica Corporation

Konishiroku Photo Industry Co., Ltd.

Katumi Matuura

Hiroyuki Nomori

Yoshiaki Takei

An electrophotographic photoreceptor is disclosed which has a photosensitive layer comprising block a copolymer composed of a polymer block A comprising a polysilane and a polymer block B comprising a polymer of anionic polymerizable monomers; or a graft copolymer composed of the polymer block A and a polymer block C comprising another polymer as a positive hole transportation material. The photoreceptor is excellent in the mechanical strength, stable chargeability and photosensitivity.

Electrophotographic photoreceptor

A photoreceptor comprising a photosensitive layer and a support, wherein said photosensitive layer contains a polycarbonate compound binder selected from the group consisting of Formula A and B, ##STR1## wherein R.sub.1 and R.sub.2 are independently hydrogen, substituted or unsubstituted aliphatic, or a substituted or unsubstituted hydrocarbon ring, provided that at least one of R.sub.1 and R.sub.2 has at least 3 carbon atoms, Z represents a group of atoms necessary to constitute a substituted or unsubstituted carbon ring or a substituted or unsubstituted heterocyclic ring, R.sub.3 to R.sub.10 in Formulas A and B are independently hydrogen, halogen, substituted or unsubstituted aliphatic, or a substituted or unsubstituted hydrocarbon ring, and n is a number from 10 to 1000.

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Hachioji, Japan

Katumi Matuura