The electrical properties of the pure, mixed and successively evaporated dye pigments copper phthalocyanine and indanthreneyellow GK are investigated by dark and photoconductivity measurements and compared with their electrophotographic sensitivity by arrangement as photogeneration layer in a dual layer photoreceptor configuration. The results reveal an advantageous photoelectrical behaviour of mixed layers compared with the corresponding single and double dye layers due to an effective charge separation as a result of the photoinduced charge transfer between the mixed dyes. The electrophotographic behaviour shows a smaller variation because the sensitivity is largely influenced by an effective hole injection from the charge generation dye layer to the transparent charge transport layer.
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