HOLE TRANSPORT IN MIXTURES OF 1,1-BIS(DI-4-TOLYLAMINOPHENYL) CYCLOHEXANE AND BISPHENOL-A-POLYCARBONATE

Hole mobilities have been measured in mixtures of 1,1-bis(di-4- tolylaminophenyl) cyclohexane and bisphenol-A-polycarbonate. The temperature and electric field dependencies can be described as exp-(T0/T) 2 and exp(βE1/2), respectively. At high temperatures, T>316 K, the mobilities decrease with increasing electric field. The results are described within the framework of the disorder transport formalism introduced by Bässler and co-workers. The negative field dependence of the mobility is attributed to off-diagonal disorder and based on the assumption that fluctuations of the wavefunction overlap parameter increase with increasing temperature.