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The role of oxygen molecules in the marked increase of photoconductivity of poly-p-phenylene sulfide (PPS) films has been studied. Optical, photoconductive and structural studies of PPS films prepared with oxygen doping and/or dedoping processes have clarified the carrier transport mechanism. We have proposed a sensitive model wherein oxygen molecules reversibly doped in the amorphous region of PPS films act as hopping sites for carrier transport. By use of the oxygen-doped PPS film as a carrier transport layer of photoreceptors, the hole transport ability was improved as a result of doping.
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Takimoto et al. (1993) studied this question.
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