| 摘要 |
PURPOSE:To enhance sensitivity and durability by incorporating a specified azo type compd. in a photosensitive layer. CONSTITUTION:A photosensitive layer formed on a conductive substrate contains an azo type compd. represented by formula I in which X is H, lower alkyl, lower alkoxy, halogen, or cyano; Z1, Z2 are each formula II or III; A is a bivalent optionally substd. heterocyclic group contg. N in the ring or a bivalent optionally substd. aromatic hydrocarbon group; and n is 1 or 2. When such a compd. absorbs light, it generates electrostatic charge carriers with high efficiency, so it is suitable to use it for the charge carrier generating material of a functionally separated photosensitive body, and it is especially suitable to use it for the charge generating layer of the laminated type photosensitive body composed of a charge generating layer and a charge transfer layer. The photosensitive body using such an azo compd. is high in sensitivity, good in color sensitivity, and small in fluctuation of sensitivity and chargeability and also in light fatigue even in repeated uses, and superior in durability.
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