Abstract

Charge transport in disordered organic blends is studied theoretically by numerically solving the Pauli master equation. The influence of temperature, electric field, and charge carrier concentration on blend mobility are assessed. Important differences between neat materials and blends are found: The dependence of mobility on charge carrier concentration is more pronounced in blends and it is influenced by the electric field strength. At low charge carrier densities, blend mobility is found to decrease with increasing field.

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