| 摘要 |
PROBLEM TO BE SOLVED: To provide an image formation device in which a photoreceptor has high sensitivity to suppress point defect of an image and even if an optical discharge method is employed, a charge potential of the photoreceptor is maintained.SOLUTION: An image formation device includes a photoreceptor which contains a photosensitive layer that contains at least one kind of charge generating material that is selected from between hydroxy-gallium-phthalocyanine pigment and chloro-gallium-phthalocyanine pigment, positive hole transportation material, and electron transportation material, with a formula (12): index D=-d×log(0.5)/A satisfying a formula (11):D/M≤0.66, as well as an optical discharge means of the photoreceptor. Here, in the formula (11) and the formula (12), D is an index of invasion depth of light in photosensitive layer, Mis content of electron transportation material (mass %), d is thickness of photosensitive layer (μm), A is absorbance of the light of photosensitive layer. |
