Electrophotographic photosensitive member

Claim 1

An electrophotographic photosensitive member comprising a photosensitive layer comprising a combination of a carrier generating phase and a carrier transporting phase provided on an electroconductive support, said carrier generating phase containing a bisazo compound represented by the formula [I] shown below and said carrier transporting phase containing a carrier transporting material selected from the group consisting of at least one of styryl compounds represented by the formula [II] shown below, amine derivatives represented by the formula [III], hydrazone compounds represented by the formula [IV], [V] and [VI] and carbazole derivatives represented by the formula [VII]: ##STR21## wherein each of Ar 1 , Ar 2 and Ar 3 represents a divalent carbocyclic aromatic residue or a divalent heterocyclic aromatic residue; each of R 1 , R 2 , R 3 and R 4 represents an electron attracting group or a hydrogen atom, provided that 1 or 2 of R 1 to R 4 are electron attracting groups and the case where R 1 and R 2 or R 3 and R 4 are electron attracting groups at the same time is excluded; A is a group represented by the following formula: ##STR22## wherein X is a hydroxyl group, ##STR23## where each of R 6 and R 7 is a hydrogen atom, an alkyl group and R 8 is an alkyl group or an aryl group; Y is a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a carboxyl group, a sulfo group, a carbamoyl group or a sulfamoyl group; Z is a group of atoms necessary for forming a carbocyclic aromatic ring or a heterocyclic aromatic ring; R 5 is a hydrogen atom, an amino group, a carbamoyl group, a carboxyl group or its ester group; A' is an aryl group; n is an integer of 1 to 3; and m is an integer of 0 to 4, ##STR24## wherein each of R 9 and R 10 represents an alkyl group or phenyl group; R 11 represents a phenyl group, naphthyl group, anthryl group, fluorenyl group or heterocyclic group; each of R 12 to R 15 represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group or an amino group, ##STR25## wherein each of Ar 4 and Ar 5 represents a phenyl group; and Ar 6 represents a phenyl group, naphthyl group, anthryl group, fluorenyl group or heterocyclic group, ##STR26## wherein each of R 16 to R 17 represents a hydrogen atom or a halogen atom; each of R 18 and R 19 represents an aryl group; and Ar 7 represents an arylene group, ##STR27## wherein R 20 represents an aryl group or a heterocyclic group; R 21 represents a hydrogen atom, an alkyl group or an aryl group; X 1 represents a hydrogen atom, a halogen atom, an alkyl group, an amino group or an alkoxyl group; and p represents an integer of 0 or 1, ##STR28## wherein R 22 represents an aryl group or a heterocyclic group; R 23 represents a hydrogen atom or an alkyl group; X 2 represents a hydrogen atom, a halogen atom, an alkyl group, an amino group, an alkoxy group or a cyano group; and q represents an integer of 0 or 1, ##STR29## wherein R 24 represents an aryl group; R 25 represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an amino group or a hydroxyl group; and R 26 represents an aryl group or a heterocyclic group.