Electrophotographic photoreceptor having an organic photoelectroconductive light sensitive layer

An electrophotographic photoreceptor comprising a conductive substrate having thereon a photosensitive layer containing a carrier generation material and a compound represented by the following formula 1, 2 or 3;

• ##STR6## wherein R.sub.1 is a hydrogen atom, an alkyl group, an alkoxy group, a cycloalkyl group, an aryl group, an aryloxy group or a heterocylic group;
• R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 R.sub.7, R.sub.8 and R.sub.9 are independently a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a cycloalkyl group, an aryl group or an aryloxy group, said groups represented by R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 R.sub.7, R.sub.8 and R.sub.9 each may have a substituent selected from a halogen atom, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, a thioether group, an acyl group and sulfonamido group, ##STR7## wherein R.sub.11 l is a hydrogen atom, an alkyl group, an alkoxy group, a cycloalkyl group, an alkenyl group, an aryl group, an aryloxy group or a heterocylic group;
• R.sub.12, R.sub.13, R.sub.14, R.sub.15, R.sub.16, R.sub.17, R.sub.18 and R.sub.19 are independently a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a cycloalkyl group, an aryl group or an aryloxy group, said groups represented by R.sub.11, R.sub.12, R.sub.13, R.sub.14, R.sub.15, R.sub.16, R.sub.17, R.sub.18 and R.sub.19 each may have a substituent selected from a halogen atom, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, a thioether group, an acyl group and sulfonamido group, ##STR8## wherein R.sub.21 is a hydrogen atom, an alkyl group, an alkoxy group, a cycloalkyl group, an alkenyl group, an aryl group, an aryloxy group or a heterocylic group;
• R.sub.22, R.sub.23, R.sub.24, R.sub.25 , R.sub.26, R.sub.27, R.sub.28 and R.sub.29 are independently a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a cycloalkyl group, an aryl group or an aryloxy group, said groups represented by R.sub.21, R.sub.22, R.sub.23, R.sub.24, R.sub.25, R.sub.26, R.sub.27, R.sub.28 and R.sub.29 each may have a substituent selected from a halogen atom, an alkenyl group, an alkoxy group, an aryl group, an arylpxy group, a thioether group, an acyl group and sulfonamido group.