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AssigneeFuji Xerox Co., Ltd.
InventorsKatsumi Daimon, Katsumi Nukada, Akira Imai, Masakazu Iijima, Kazuo Yamasaki, Kiyokazu Mashimo, Yasuo Sakaguchi, Toru Ishii
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Crystals of hydroxygallium phthalocyanine, a method of preparing the crystals, a photoconductive material containing the crystals, and an electrophotographic photoreceptor having the material. The photoreceptor has excellent electrophotographic characteristics. The crystals of hydroxygallium phthalocyanine have distinct diffraction peaks at (i) 7.5.degree., 9.9.degree., 12.5.degree., 16.3.degree., 18.6.degree., 25.1.degree. and 28.3.degree., or (ii) 7.7.degree., 16.5.degree., 25.1.degree. and 26.6.degree., or (iii) 7.9.degree., 16.5.degree., 24.4.degree. and 27.6.degree., or (iv) 7.0.degree., 7.5.degree., 10.5.degree., 11.7.degree., 12.7.degree., 17.3.degree., 8.1.degree., 24.5.degree., 26.2.degree. and 27.1.degree., or (v) 6.8.degree., 12.8.degree., 15.8.degree. and 26.0.degree. or (vi) 7.4.degree., 9.9.degree., 25.0.degree., 26.0.degree., and 28.2.degree. of the Bragg angle (2.theta..+-.0.2) in the X-ray diffraction spectrum. The electrophotographic photoreceptor has a light-sensitive layer containing the photoconductive material of the crystals.
Hydroxygallium phthalocyanine crystals having distinct diffraction peaks at 7.5.degree., 9.9.degree., 12.5.degree., 16.3.degree., 18.6.degree., 25.1.degree. and 28.3.degree. of the Bragg angle (2.theta..+-.0.2) in the X-ray diffraction spectrum.
Hydroxygallium phthalocyanine crystals having distinct diffraction peaks at 7.7.degree., 16.5.degree., 25.1.degree. and 26.6.degree. of the Bragg angle (2.theta..+-.0.2) in the X-ray diffraction spectrum.
Hydroxygallium phthalocyanine crystals having distinct diffraction peaks at 7.9.degree., 16.5.degree., 24.4.degree. and 27.6.degree. of the Bragg angle (2.theta..+-.0.2) in the X-ray diffraction spectrum.
Hydroxygallium phthalocyanine crystals having distinct diffraction peaks at 7.0.degree., 7.5.degree., 10.5.degree., 11.7.degree., 12.7.degree., 17.3.degree., 18.1.degree., 24.5.degree., 26.2.degree. and 27.1.degree. of the Bragg angle (2.theta..+-.0.2) in the X-ray diffraction spectrum.
Hydroxygallium phthalocyanine crystals having distinct diffraction peaks at 6.8.degree., 12.8.degree., 15.8.degree. and 26.0.degree. of the Bragg angle (2.theta..+-.0.2) in the X-ray diffraction spectrum.
Hydroxygallium phthalocyanine crystals having distinct diffraction peaks at 7.4.degree., 9.9.degree., 25.0.degree. and 26.0.degree. and 28.2.degree. of the Bragg angle (2.theta..+-.0.2) in the X-ray diffraction spectrum.
A method of preparing hydroxygallium phthalocyanine crystals having distinct diffraction peaks at 7.5.degree., 9.9.degree., 12.5.degree., 16.3.degree., 18.6.degree., 25.1.degree. and 28.3.degree. of the Bragg angle (2.theta..+-.0.2) in the X-ray diffraction spectrum, said method comprising treating hydroxygallium phthalocyanine with a solvent containing at least one selected from the group consisting of amides, esters and ketones.
A photoconductive material for electrophotographic photoreceptor comprising at least one of (a) hydroxygallium phthalocyanine crystals having distinct diffraction peaks at 7.5.degree., 9.9.degree., 12.5.degree., 16.3.degree., 18.6.degree., 25.1.degree. and 28.3.degree. of the Bragg angle (2.theta..+-.0.2) in the X-ray diffraction spectrum;
An electrophotographic photoreceptor comprising an electroconductive support having thereon a light-sensitive layer containing at least one of (a) hydroxygallium phthalocyanine crystals having distinct diffraction peaks at 7.5.degree., 9.9.degree., 12.5.degree., 16.3.degree., 18.6.degree., 25.1.degree. and 28.3.degree. of the Bragg angle (2.theta..+-.0.2) in the X-ray diffraction spectrum;
Hydroxygallium phthalocyanine crystals having distinct diffraction peaks at degrees of the Bragg angle (2.theta..+-.0.2) in the X-ray diffraction spectrum prepared by treating hydroxygallium phthalocyanine with a solvent selected from the group consisting of amides, ketones, alcohols, amines, aromatic alcohols and polyhydric alcohols.
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