Abstract
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 $\ensuremath{\psi}(t)\ensuremath{\sim}{t}^{\ensuremath{-}(1+\ensuremath{\alpha})}$ can account for the transit-time dispersion in a limited temperature range but that more complicated $\ensuremath{\psi}(t)'\mathrm{s}$ 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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