Hole mobilities of binary solid solutions of tri‐p‐tolylamine and bisphenol‐A‐polycarbonate have been measured as functions of electric field and temperature for concentrations between 6% and 50% tri‐p‐tolylamine. The mobilities can be described by an exponential dependence on the square root of the electric field and a temperature‐dependent activation energy. The results are discussed within the framework of a model involving hopping within a Gaussian distribution‐of‐states broadened by disorder.
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