| 摘要 |
PROBLEM TO BE SOLVED: To obtain an electrophotographic photoreceptor excellent in sensitivity and electrification ability by incorporating a mixture of specified plural tetraazaporaphyrin derivatives into a photosensitive layer on an electrically conductive substrate. SOLUTION: The electrophotographic photoreceptor has a photosensitive layer containing a mixture of two or more tetraazaporphyrin derivatives of at least formula I on an electrically conductive substrate. In the formula I, A-D are each a benzene ring which may have a substituent or a ring of formula II and may be mutually the same or different, M is a metal, a metal oxide, a metal hydroxide or a metal halide, r1-r4 are each H, halogen, optionally substituted alkoxy, optionally substituted aryl, optionally substituted cycloalkyl or nitro.
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