| 摘要 |
An electrophotographic photosensitive member have a photosensitive layer, said photosensitive layer comprising at least one dis-azo pigment of Formula (I) or Formula (II) shown below: <IMAGE> Formula (I) wherein Z represents an oxygen atom, a sulfur atom or >N-A2, wherein A2 is a hydrogen atom or a lower alkyl, A1 a hydrogen atom, a lower alkyl or a halogen atom; Ph1 an unsubstituted or substituted phenylene group, n an integer of 0 or 1, and B1 a coupler residue; with proviso that when n is 0, Z is an oxygen atom and A1 is a hydrogen atom, the case where Ph1 represents substituted phenyl radicals except for unsubstituted or mono-substituted phenyl radicals with a halogen atom, a lower alkyl or an alkoxy group; and <IMAGE> Formula (II) wherein Ph2 represents an unsubstituted or substituted phenylene group and B2 a coupler residue.
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