Electrophotographic photoreceptor

Claim 1

An electrophotographic photoreceptor having a photosensitive layer comprising a carrier generation material a block copolymer including a polymer block A comprising polysilane represented by the following formula (a) ##STR14## wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted silyl group, a substituted or unsubstituted silylidene group or a substituted or unsubstituted silylidyne group, provided that groups represented by said atoms or groups each represented by R 1 through R 6 are either the same with or different from each other; m, n and p represent each a proportion of monomer units contained in said polysilane, and a polymer block B comprising a polymer of an anionic polymerizable monomer selected from the group consisting of styrene and derivatives thereof, α-methylstyrene and derivatives thereof, acrylates, methacrylates, substituted and unsubstituted isoprenes, substituted and unsubstituted butadienes, acrylonitriles, methacrylonitriles, and alkylvinylketones; or a hole transporting graft copolymer composed of said polymer block A and a polymer block C comprising a polymer selected from the group consisting of unsaturated polyester resins, epoxy resins and polyurethane resins.