DC dark conductivity (σ) has been measured in thin films of poly(N‐vinyl carbazole) (PVK). The dependence of σ on temperature (T) followed a typical Arrhenius relation but at the same time a relation σ(T)α exp(‐[T0/T]2) could be fitted to the experimental points. To reconcile this observation, it is suggested that the expression for the conductivity then is expected to contain in addition to the activation term, the factor exp[‐(T0/T)2] which is the behavior expected in a trap‐free molecular hopping …
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