Patent ID: 6379852
Filing Date: 2002-04-30
Classification: G03G

Abstract:
An electrophotographic light-receiving member comprising a conductive support and provided thereon a photoconductive layer comprising a first layer region and a second layer region, said photoconductive layer formed of a non-single-crystal material mainly composed of silicon atom and containing at least one of hydrogen atom and halogen atom and at least one element belonging to Group IIIb of the periodic table; wherein the photoconductive layer has on the surface side thereof the second layer region and on the support side thereof the first layer region; the second layer region has a thickness sufficient to absorb from 50% to 90% of light from a semiconductor laser or light-emitting diode having a long wavelength incident thereon during imagewise exposure of said electrophotographic light-receiving member and wherein the first layer region has an element belonging to Group IIIb element in a fixed content or in a decreasing concentration from the support side to the surface layer side, the second layer region has an element belonging to Group IIIb of the periodic table in a smaller content than the first layer region, the Group IIIb element in the second layer region is in a decreasing concentration from the support side to the surface layer side, and the photoconductive layer is selected from the following (a), (b) or (c):(a) the photoconductive layer has a hydrogen and/or halogen atom content from 10 to 30 atom %, an optical band gap (Eg) from 1.75 to 1.85 eV, and a characteristic energy (Eu) obtained from the exponential tail of light absorption spectra, from 55 to 65 meV, (b) the photoconductive layer has a hydrogen and/or halogen atom content from 10 to 20 atom %, an optical band gap (Eg) of 1.75 eV or less, and a characteristic energy (Eu) obtained from the exponential tail of light absorption spectra, of 55 meV or less, or (c) the photoconductive layer has a hydrogen and/or halogen atom content from 25 to 35 atom %, an optical band gap (Eg) of 1.80 eV or more, and a characteristic energy (Eu) obtained from the exponential tail of light absorption spectra, of 55 meV or less.