| 摘要 |
PROBLEM TO BE SOLVED: To obtain an electrophotographic photoreceptor which prevents cracks in a charge transfer layer or crystallization of a charge transfer material even when the photoreceptor is stored for a long time in a photographic machine or a laser beam printer and which hardly produces transfer memory even in a reversal developing system by incorporating a specified compd. into a photosensitive layer. SOLUTION: This electrophotographic photoreceptor has a photosensitive layer on a conductive supporting body, and the photosensitive layer contains a compd. expressed by the formula. In the formula, Ar1, Ar4 are aryl groups which may have substituents, Ar2, Ar3 are fluorenyl groups which may have substituents, R1 is a hydrogen atom, halogen atom, cyano group. nitro group, alkyl group, alkoxy group or aryloxy group. Ar1 and Ar4, and Ar2 and Ar3 may be same or different from each other. This electrophotographic photoreceptor consists of a combination of a charge transfer material consisting of a triarylamine compd. expressed by the formula and a proper charge producing material.
|
