Electrophotographic photoreceptor containing granular trigonal selenium
AssigneeFuji Xerox Co., Ltd.
InventorsSeiji Ashiya, Takahiro Suzuki, Masanori Murase
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Abstract
An electrophotographic photoreceptor comprising a photosensitive layer containing granular trigonal selenium which has a mean particle diameter of not more than 5 .mu.m and which has absorption peaks in the X-ray diffraction spectrum using CuK.alpha. characteristic X-rays at Bragg angles (2.degree..theta..+-.0.2.degree.) of 23.5.degree., 29.7.degree., 41.4.degree., and 45.4.degree., is disclosed, which has high photosensitivity and low residual potential, maintains its potential characteristics in a stable manner on repeated use, and exhibits sufficient photosensitivity even when applied to high-speed copying.
Claims4
An electrophotographic photoreceptor comprising a photosensitive layer containing granular trigonal selenium which has a mean particle diameter of 0.01 .mu.m to not more than 5 .mu.m and which has absorption peaks in the X-ray diffraction spectrum using CuK.alpha. characteristic X-rays at Bragg angles (20.degree..+-.0.2.degree.) of 23.5.degree., 29.7.degree., 41.4.degree. and 45.4.degree. produced by the method comprising the reductive deposition of selenium with aqueous hydrogen peroxide by controlling the molar ratio of Se/H.sub.2 O.sub.2 in the range of 1.5 to 2.0, controlling the addition rate of said aqueous hydrogen peroxide;
- and controlling the solution temperature in the range of 35.degree.-60.degree. C.
A method of preparing granular trigonal selenium having a mean particle diameter of 0.01 .mu.m to not more than 5 .mu.m and which has absorption peaks in the X-ray diffraction spectrum using CuK.alpha. characteristic X-rays at Bragg angles (20.degree..+-.0.2.degree.) of 23.5.degree., 29.7.degree., 41.4.degree. and 45.4.degree. comprising the reductive deposition of selenium with aqueous hydrogen peroxide by controlling the molar ratio of Se/H.sub.2 O.sub.2 in the range of 1.5 to 2.0, controlling the addition rate of said aqueous hydrogen peroxide;
- and controlling the solution temperature in the range of 35.degree.-60.degree. C.
Dependencies are inferred from the claim text.