Comparison of charge transport models in molecularly doped polymers

It is well known that charge carrier mobilities μ in molecularly doped polymers, determined by transient photoconductivity experiments, depend on the temperature T, the mean distance p between dopant molecules and the electric field E. Recently introduced deconvolution procedures have made possible the systematic analysis of the dependence of μ on T, p and E. Two theories which have been proposed to account for the data are the polaron theory and the disorder theory of Bässler and co-workers. The current status of these and other theories in explaining the data is reviewed.