Theory of the field-effect mobility in amorphous organic transistors

Details Theory of the field-effect mobility in amorphous organic transistors Theory of the field-effect mobility in amorphous organic transistors

1998-02-12

arxiv.org/abs/cond-mat/9802133v1

Phys. Rev. B 57, 12964 (1998)

Physics

Condensed Matter

13 pages RevTeX, 2 Postscript figures

Scientific paper

10.1103/PhysRevB.57.12964

The field-effect mobility in an organic thin-film transistor is studied theoretically. From a percolation model of hopping between localized states and a transistor model an analytic expression for the field-effect mobility is obtained. The theory is applied to describe the experiments by Brown et al. [Synth. Met. 88, 37 (1997)] on solution-processed amorphous organic transistors, made from a polymer (polythienylene vinylene) and from a small molecule (pentacene). Good agreement is obtained, both with respect to the gate-voltage and the temperature dependence of the mobility.

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