| 摘要 |
PURPOSE:To obtain an electrophotographic receptor of high sensitivity by forming a photosensitive layer contg. a specified amorphous bisazo compd. on a conductive substrate. CONSTITUTION:The bisazo compd. is represented by formula I in which Ar1- Ar3 are each optionally substd. phenylene, naphthylene, or the like; R1-R4 are each H or cyano; A is formula II; Ar4 is an optionally substd. aromatic carbon or hetero ring; Z is an atomic group needed to form an optionally substd. aromatic hydrocarbon or hetero ring, such as formula III. This bisazo compd. is processed to enhance amorphousness, by dissolving it a good solvent, such as propyl amine, and reprecipitating it with a large amt. of poor solvent, such as water or ethanol. The conductive substrate is coated with the obtained amorphous bisazo compd. to form a carrier generating layer, and a carrier transfer layer is formed on it to obtain an intended electrophotographic receptor. |
