The role of polar additives, o, m, and p‐dinitrobenzene, on hole transport in 1,1‐bis(di‐4‐tolylamino‐phenyl)cyclohexane doped polycarbonate is investigated. The results are described by a model based on hopping through a manifold of states with superimposed energetic and positional disorder that remains static on the time scale of a hopping event. The results lead to the conclusion that the main effect of the polar additives is the enhancement of disorder, both energetic and positional, the dipolar reorientation being relatively unimportant.
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Borsenberger et al. (1992) studied this question.
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