Ambipolar charge transport in organic field-effect transistors

Edsger C.P. Smits*, Thomas D. Anthopoulos, Sepas Setayesh, Erik Van Veenendaal, Reinder Coehoorn, Paul W.M. Blom, Bert De Boer, Dago M. De Leeuw

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

166 Scopus citations


A model describing charge transport in disordered ambipolar organic field-effect transistors is presented. The basis of this model is the variable-range hopping in an exponential density of states developed for disordered unipolar organic transistors. We show that the model can be used to calculate all regimes in unipolar as well as ambipolar organic transistors, by applying it to experimental data obtained from ambipolar organic transistors based on a narrow-gap organic molecule. The threshold voltage was determined independently from metal insulator semiconductor diode measurements. An excellent agreement between theory and experiment is observed over a wide range of biasing regimes and temperatures.

Original languageEnglish (US)
Article number205316
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number20
StatePublished - 2006
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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