Abstract
The effect of space-charge perturbation due to either trapped or free charge on the xerographic discharge of photoreceptors has been studied. In the case of trapped charge, the xerographic gain vs field curves can be analyzed to yield estimates for the carrier range and this is illustrated by measurements on amorphous selenium. The achievement of space-charge-limited xerographic discharges in Se : poly(N-vinyl carbazole) layered structures will also be described. In this case it is shown that measurements of parameters which in the past have been viewed only from an applications viewpoint, e.g., contrast potential, can be useful in probing charge transport in appropriate solids.
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