Patent ID: 8354211

Claim:
An electrophotographic photoreceptor comprising a layered-type photosensitive layer in which a charge generating layer containing a charge generating material and a charge transporting layer containing a charge transporting material are stacked, formed on a conductive supporting member made of a conductive material, wherein the electrophotographic photoreceptor has high sensitive characteristics to a semiconductor laser beam having a wavelength ranging from 380 to 500 nm; the charge transporting layer of the layered-type photosensitive layer contains as the charge transporting material, a triarylamine dimer compound represented by the general formula (I): when Ar 1 and Ar 2 represent phenylene group, Ar 3 and Ar 4 represent 2 naphthyl group, R 1 and R 2 represent methyl group, a and b represent methyl group, and m and n represent 1; when Ar 1 represents 2,5-benzofuranylidene group and Ar 2 represents phenylene group, Ar 3 and Ar 4 represent 2-naphthyl group, R 1 and R 2 represent methyl group, a and b represent methyl group, and m and n represent 1; when Ar 1 represent 2,5-benzofuranylidene group and Ar 2 represents phenylene group, Ar 3 and Ar 4 represent 2,4-dimethylphenyl group, R 1 and R 2 represent methyl group, a and b represent methyl group, and m and n represent 1; or when Ar 1 and Ar 2 represent phenylene group, Ar 3 and Ar 4 represent o-tolyl group, R 1 and R 2 represent methyl group, a and b represent a hydrogen atom, and m and n represent 1; and a film thickness of the photosensitive layer is 30 μm or less.