Patent ID: 6521386
Filing Date: 2003-02-18
Classification: G03G

Abstract:
An electrophotographic photoreceptor, comprising:an electroconductive substrate; and a photoreceptive layer overlying said substrate; wherein said photoreceptive layer comprises: a charge carrier generation layer comprising a charge carrier generation material, and a charge carrier transport layer comprising a charge carrier transport material, and wherein when an electric field of 2.5Ã—105 V/cm to 5.5Ã—105 V/cm is applied to said charge carrier transport layer, the following relationship is satisfied: tCTL/&mgr;CTL&lE;102VÂ·s/m wherein tCTL represents a thickness of said charge carrier transport layer and &mgr;CTL represents a charge mobility of said charge carrier transport layer, and said charge carrier transport material of said charge carrier transport layer comprises an electron accepting material selected from the group consisting of chloranil, bromanil, tetracyanoethylene, tetracyanoquinodimethane, 2,4,7-trinitro-9-fluorenone, 2,4,5,7-tetranitroxanthone, 2,4,8-trinitrothioxanthone, 2,6,8-trinitro-indeno-4H-indeno [1,2-b]thiophene-4-one, and 1,3,7-trinitrodibenzothiophene-5,5-dioxide or a hole transporting material selected from the group consisting of 9-(p-diethylaminostyryl)anthracene, 1,1-bis-(4-dibenzylaminophenyl)propane, styryl anthracene, styryl pyrazoline, a compound of formula (b), and a compound of formula (e):