| 摘要 |
PURPOSE:To obtain an electrophotographic photoreceptor which has high sensitivity at the short-wavelength side and exhibits superior reproducibility in the visible- ray range, by using a photosensitive layer which contains azo pigment as a charge carrier generating substance. CONSTITUTION:Azo pigment expressed by formula I [where X is a benzene ring, naphthalene ring, indole ring, carbazole ring, or benzole ring, Ar1; a benzene ring, naphthalene ring or dibenzofuran ring, Ar2; a benzene ring or naphthalene ring, R1 H; lower alkyl or phenyl, and R2; lower alkyl or carboxyl], such as formula [II], is used. On conductive base 1, photosensitive layer 2 composed of charge generating layer 5 of about 0.01-5mum in thickness consisting essentially of said azo pigment 3 and charge movement layer 6 of about 3-50mum in thickness consisting essentially of a charge movement substance (e.g. 2, 4, 7-trinitro-9-fluorene) is provided to obtain the photoreceptor. |
