Abstract
The electrophotographic properties of a negatively charged double-layered photoconductor that con- sisted of y-type metal phthalocyanine (TiOPc) and x-type metal-free phthalocyanine (H2Pc) composites were studied. The undercoating layer (UCL) was fabricated by a dip-coating method with Al2O3 and polyamide, and the charge trans- port layer (CTL) was prepared from N,N'-Bis-(3-methylpenyl)-N,N''-bis-(phenyl)-benzidine (TPD), polycarbonate (PC), and polyester (PE). In the charge generation layer (CGL), the dispersion state becomes more homogeneous with in- creasing amounts of non-metal phthalocyanine (H2Pc). The electrophotographic properties of the photoconductor were obtained by using photo-induced discharge curves (PIDC) of charge acceptance, dark decay, photosensitivity, and pho- tofatigue. It was found that the initial charge potential was not dependent on the compositional ratio of the charge gener- ating material. However, the dark decaying rates and the photosensitivity were proportional to the content of TiOPc in the organic photoconductors.
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