| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrophotographic organic photoreceptor capable of being easily fitted to an electrophotographic device such as a printer or a facsimile and having high resolution 600dpi. SOLUTION: This photoreceptor is used for an electrophotographic device using a semiconductor laser or a light emitting diode array as an exposure light source, and it has an organic photosensitive layer constituted of a charge generating layer and a charge transporting layer on a conductive substrate. For the light attenuation characteristic of the photoreceptor, the ratio A/B is set to 0.40 or above, where AμJ/cm<2> is the exposure quantity required for increasing the surface potential from -600V to -300V and is set to 0.25-0.45, and BμJ/cm<2> is the exposure quantity required for increasing the surface potential from -600V to -100V.
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