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

In addition, it is argued that the intrinsic mobility in MDP's is activated with an activation energy that is independent of dopant concentration, and has a pre-factor which is exponential in ρ, the calculated distance between dopant molecules, as expected for a hoping theory. The experimental observations of other behaviors, activation energies that depend on ρ and pre-factors independent of ρ, are attributed to either interactions among the dopant molecules or the failure of the lattice gas model to properly calculate ρ at high dopant concentrations.