Titanyloxyphthalocyanine crystals, methods for preparing the same, and electrophotographic photoreceptors using such crystals

摘要

A titanyloxyphthalocyanine crystal to be used as a charge-generation material has a maximum diffraction intensity observed at Bragg angle (2&thetas;) of 9.6 DEG +/- 0.2 DEG and clear peaks of diffraction intensity observed at 7.22 DEG +/- 0.2 DEG , 9.60 DEG +/- 0.2 DEG , 11.60 DEG +/- 0.2 DEG , 13.40 DEG +/- 0.2 DEG , 14.88 DEG +/- 0.2 DEG , 18.34 DEG +/- 0.2 DEG , 23.62 DEG +/- 0.2 DEG , 24.14 DEG +/- 0.2 DEG , and 27.32 DEG +/- 0.2 DEG , respectively, in a X-ray diffraction spectrum obtained by performing a X-ray diffraction method using CuK alpha as a source of radiation. In addition, an electrophotographic photoreceptor has the titanyloxyphthalocyanine crystal as a charge-generation material. <IMAGE>