The charge carrier mobility’s activation energies and pre-factor dependence on dopant concentration in molecularly doped polymers

The elucidation of the charge transport mechanism in molecularly doped polymers MDP has been confused by disagreement on the role of disorder, which has led to disagreement on how to analyze the experimental mobility data. Plotting the mobility vs. T⁻¹ or T⁻² where T is temperature gives an Arrhenius activation energy or disorder energy respectively, which cannot be compared. A methodology is suggested to convert disorder energies into activation energies. This allows a compilation of a list of the activation energies of all MDP’s which have been characterized as a function of dopant concentration and a correlation of the activation energies with material properties.