Origin of Electric Field Dependence of the Charge Mobility and Spatial Energy Correlations in C60-Based Field Effect Transistors

Molecular Crystals and Liquid Crystals. 2014. Vol. 589. P. 18–28.

Fishchuk I. I., Kadasnchuk A., Новиков С. В., Ullah M., Genoe J., Sariciftci N. S., Sitter H., Bassler H.

We report on the influence of the lateral electric field on the charge mobility in organic field-effect transistors (OFET) based on C 60 films with multigrain morphology. The experimental data were quantitatively described using a recent analytical model by accounting for the strong local electric fields in a multigrain transistor channel and for the energy correlation effects. To rationalize the presence of a correlated disorder in a non-polar C 60 material, we show that randomly oriented permanent dipoles in organic gate dielectric layers can generate a significant dipolar disorder in an adjacent nonpolar semiconductor layer.

Ключевые слова: транспорт носителей заряда, полевые транзисторы, фуллеренсодержащие вещества, charge carrier transport, field effect transistors, fullerene-based materials