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AssigneeRicoh Company, Ltd.
InventorsTakeo Kazami, Kiyoshi Sakai, Mitsuru Hashimoto, Masaomi Sasaki, Kyoji Tsutsui, Masafumi Ohta
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An electrophotographic element according to the present invention exhibits an exceedingly high sensitivity and it comprises (1) an electroconductive support, a charge producing layer consisting essentially of a charge producing substance and a charge transport layer consisting essentially of a charge transport substance having the following general formula and a binder, the last-mentioned two layers being superposed in that order or vice versa on said support, or (2) an electroconductive support and a photosensitive layer, superposed thereon, and consisting essentially of a charge producing substance, a charge transport substance having said general formula and a binder: ##STR1## (wherein n is an integer of 1 or 2, R.sub.1 stands for hydrogen atom or an alkyl, nitro, dialkylamino, alkoxy, nitrile or carboxylic ester group, and R.sub.2 and R.sub.3 stand for hydrogen or halogen atom or nitro or dialkylamino group respectively).
An electrophotographic element which comprises an electroconductive support, a charge producing layer consisting essentially of a charge producing substance and a charge transport layer consisting essentially of a charge transport substance having the following general formula and a binder, said layers being superposed on said support in that order:
An electrophotographic element which comprises an electroconductive support, a charge transport layer consisting essentially of a charge transport substance represented by the following general formula and a binder and a charge producing layer consisting essentially of a charge producing substance, said layers being superposed on said support in that order:
An electrophotographic element which comprises an electroconductive support and a photosensitive layer superposed thereon, said photosensitive layer consisting essentially of a charge transport substance having the following general formula, a charge producing substance and a binder:
Dependencies are inferred from the claim text.