Patent ID: 6949321

Claim:
A double-layered positively-charged organic photoreceptor comprising: an electroconductive support; a charge transport layer formed on a surface of the electroconductive support and including a charge transport material for transporting holes, a polycarbonate-based first binder resin, and a second binder resin of a polyester copolymer with a biphenylfluorene group of formula (1) below; and a charge generating layer formed on the surface of the charge transport layer: where hydrogen in the aromatic rings is unsubstituted or substituted with a moiety selected from the group consisting of a halogen atom, a C 1 -C 20 aliphatic hydrocarbon group, and a C 5 -C 8 cycloalkyl group, and wherein the amount of the second binder resin is in a range of 1-30% by weight based on the total weight of the first and second binder resins.