Abstract
A theoretical model based on exponential energy dependent mobility and density of states is proposed to describe the carrier transport in disordered organic materials. A power–law current–voltage relationship is derived and the power factor is found to depend on the half-width of the density of state distribution. The increased carrier concentration begins to populate higher mobility states, causing a higher averaged mobility. The combined effect of increased carrier concentration and the higher averaged mobility leads to the super-linear current–voltage relationship.
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