Temperature Dependence of Transient Hole Hopping Transport in Disordered Organic Solids: Carbazole Polymers

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 $\psi \mathrm{}\left(t\right)\mathrm{}\sim t^{-(1+\alpha )}$ can account for the transit-time dispersion in a limited temperature range but that more complicated $\psi \mathrm{}\left(t\right)\text{'}\mathrm{s}$ are necessary to model the results in a broader temperature range. The subtle relation between sample morphology and transient dispersion is demonstrated.