| 摘要 |
PROBLEM TO BE SOLVED: To obtain a highly sensitive photoreceptor which exhibits high quality image and can be used for a long period of time with little potential change by incorporating hydroxygallium-phthalocyanine and a particular disazo pigment into a photosensitive layer. SOLUTION: In an electrophotographic photoreceptor having a photosensitive layer on an electroconductive support, the photosensitive layer contains hydroxygallium-phthalocyanine and a disazo pigment expressed by the formula, wherein A1 and A2 are the same or different and are each a coupler residue having phenolic hydroxyl groups. The process cartridge supports one means selected from the electrophotographic photoreceptor, electrifying means, developing means and cleaning means, in the united form, and is freely attached to or detached from an electrophotographic device main body. The electrophotographic device main body is equipped with the electrophotographic photoreceptor, the electrifying means, image-exposing means, the developing means and transferring means.
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