Xerographic properties of metal/metal-free phthalocyanine composites in a double-layered photoconductor

The electrophotographic properties of a negatively charged double-layered photoconductor that consisted of y-type metal phthalocyanine (TiOPc) and x-type metal-free phthalocyanine (H(2)Pc) composites were studied. The undercoating layer (UCL) was fabricated by a dip-coating method with Al(2)O(3) and polyamide, and the charge transport layer (CTL) was prepared from N,N'-Bis-(3-methylpenyl)-N,NaEuro(3)-bis-(phenyl)-benzidine (TPD), polycarbonate (PC), and polyester (PE). In the charge generation layer (CGL), the dispersion state becomes more homogeneous with increasing amounts of non-metal phthalocyanine (H(2)Pc). The electrophotographic properties of the photoconductor were obtained by using photo-induced discharge curves (PIDC) of charge acceptance, dark decay, photosensitivity, and photofatigue. It was found that the initial charge potential was not dependent on the compositional ratio of the charge generating material. However, the dark decaying rates and the photosensitivity were proportional to the content of TiOPc in the organic photoconductors.