Patent ID: 6489071
Filing Date: 2002-12-03
Classification: G03G

Abstract:
An electrophotosensitive material comprising an organic photosensitive layer and an inorganic surface protective layer laid over a conductive substrate in this order, wherein at least an outermost part of the organic photosensitive layer that contacts the surface protective layer contains a diphenylamine compound represented by a formula (1): wherein â€˜Aâ€™ denotes a group having at least one of aromatic groups, heterocyclic groups, double bond groups and conjugated double bond groups combined with two phenyl groups in the formula in a manner to jointly form a &pgr;-electron conjugated system, provided that when â€˜Aâ€™ is the only one phenyl group that is directly combined with nitrogen atom in the formula, this phenyl group further possesses a group including one or more aromatic groups, heterocyclic groups, double bond groups or conjugated double bond groups which form the &pgr;-electron conjugated system jointly with these groups, or that when â€˜Aâ€™ possesses a double bond group directly combined with nitirogen atom in the formula and one phenyl group attached to its end, this phenyl group further possesses a group including one or more aromatic groups, heterocyclic groups, double bond groups or conjugated double bond groups which form the &pgr;-electron conjugated system jointly with these groups; R1 and R2 are the same or different and each denote a hydrogen atom, alkyl group, alkoxy group, aralkyl group, aromatic group or halogen atom; R1 or R2 may form a condensed ring jointly with the phenyl group; and â€˜aâ€™ and â€˜bâ€™ are the same or different and each denote an integer of 0 to 5.