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Nondispersive hopping transport has been observed in disordered poly(N-vinylcarbazole) (PVK) but not in the related polymer 3 Br-PVK. The results demonstrate that a hopping-time distribution ψ(t)~t^-(1+α) can account for the transit-time dispersion in a limited temperature range but that more complicated ψ(t)'s are necessary to model the results in a broader temperature range. The subtle relation between sample morphology and transient dispersion is demonstrated.
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Pfister et al. (1978) studied this question.
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