Electrophotographic photosensitive member, an electrophotographic apparatus, an integrated elecrophotographic unit and a facsimile machine having the electrophotographic photosensitive member.

摘要

An electrophotographic photosensitive member has an electroconductive substrate and a photosensitive layer thereon, and the photosensitive layer contains a disazo pigment represented by the following formula: <CHEM> where Z is an oxygen atom or a sulfur atom, Ar1 and Ar2 are the same or different and are each a substituted or unsubstituted bivalent carbocyclic group or a substituted or unsubstituted bivalent heterocyclic aromatic group, n is 1 or 2, and A1 and A2 are the same or different and are each a coupler residue having a hydroxyl group. <IMAGE>