  We have examined the electrical transport in disordered molecular solids. It
has been found that mobility is a function of electric field and temperature
due to hopping conduction. Several theoretical models for charge transport in
disordered solids have been debated over the role of spatial and energetic
correlation in these systems and such correlations have been recently shown to
explain the universal electric field dependence of mobility. We have compared
and evaluated the applicability of different theoretically proposed models
using very simple experimental results and based on our extensive analysis, we
have found that correlation is important to explain the electrical transport in
these systems.
