Patent ID: 8241824

Claim:
An electrophotographic photoreceptor comprising an electrically conductive support having thereon a photo sensitive layer having a laminated structure comprising a charge generation layer and a charge transport layer, wherein the charge generation layer comprises a titanyl phthalocyanine pigment having a crystal structure exhibiting the following peaks of Bragg angles 2θ (±0.2°) of X-ray powder diffraction employing a characteristic X-ray of a CuKα radiation (having a wavelength of 1.542 Å): at least a largest diffraction peak at 27.2°, major diffraction peaks at 9.4°, 9.6° and 24.0°, and a diffraction peak of a lowest angle at 7.3° while exhibiting no peak between the peaks of 7.3° and 9.4° and no peak at 26.3°; and the charge transport layer comprises a compound represented by Formula (1) or (2): wherein R 1 and R 2 each represent an alkyl group having 1-5 carbon atoms or an alkoxy group having 1-5 carbon atoms; R 3 and R 4 each represent a substituted or non-substituted alkyl group having 1-5 carbon atoms or a substituted or non-substituted alkoxy group having 1-5 carbon atoms; n represents an integer of 0-2; o represents an integer of 0-3; l and m each represent an integer of 0-5; and A, B, C and D each represent a hydrogen atom, a substituted or non-substituted alkyl group, a substituted or non-substituted alkoxy group or a substituted or non-substituted aryl group, provided that A, B, C and D are not simultaneously a hydrogen atom, wherein R 5 , R 6 , R 7 and R 8 each represent an alkyl group having 1-5 carbon atoms or an alkoxy group having 1-5 carbon atoms; p represents an integer of 0-5; q represents an integer of 0-4; r represents an integer of 0-2; s represents an integer of 0-3; R 9 and R 10 each represent an alkyl group or an aryl group; R 9 and R 10 may be combined to form a ring; and A, B, C and D each are the same as A, B, C and D, respectively, defined in Formula (1), provided that A, B, C and D are not simultaneously a hydrogen atom.