Abstract
Recently the stability of photoconductive properties and reliability of photoconductive devices composed of polymeric materials have attracted researcher's attention because of the academic interests and increasing commercial applications [1]. For some photoconductive composites containing phthalocyanines, the photoconductivity is strongly influenced by the presence of some impurities, like oxygen [2, 3] and also depends on electron donors and acceptors [4]. On the other hand, it was reported that humidity had influence on the photoconductivity of titanyl phthalocyanine (TiOPc) dispersed in polymer matrix, and the existence of H_2O could increase the photosensitivity of charge generation material, such as TiOPc [5, 6]. Lately we have found that photoconductive performance of titanyl phthalocyanine/poly (styrene-co-acryalonitrile) (TiOPc/SAN) prepared by coating was partly related to thermal-treatment conditions, because the content f residual tetrahydrofuran (THF) solvent in films during preparation was changed. The present article studies the effect of thermal treatment on photoconductive properties of TiOPc/SAN films on their photosensitivity (1/t_(1/2)) and the charging voltage (V_0).
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