PHOTOCONDUCTIVITY OF ZINC PHTHALOCYANINE AND ITS HOMOPHASE COMPOSITES

The photoconductivity of dual layer photoreceptors, containing zinc ph thalocyanine (ZnPc) or other phthalocyanines as the charge generators, and polyvinylcarbazole (PVK) as the charge transportor, have been stu died. Various factors influencing the photoconductivity of the materia ls were analysed. The results show that ZnPc possesses an obvious phot oconductivity which can be further increased after solvent treatment a nd ball milling. The photoconductivity of ZnPc mixed in homophase with copper phthalocyanine(CuPc), ferrous phthalocyanine (Fe(II)Pc) or chl oroindium phthalocyanine (InCIPc) was also studied. An increased photo conductivity for ZnPc-CuPc but a decreased photoconductivity for ZnPc- InCIPc and ZnPc-Fe(II)Pc were found. Polymorphic transformation of ZnP c occurs from one composite to another and this is probably due to the change in the intermolecular interaction within these materials.