Temperature-independent transport in high-mobility pentacene transistors

  • Nelson S
  • Lin Y
  • Gundlach D
 et al. 
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Abstract

The charge-carrier transport mechanism in the organic semiconductor pentacene is explored using thin-film transistor structures. The variation of the field-effect mobility with temperature differs from sample to sample, ranging from thermally activated to temperature-independent behavior. This result excludes thermally activated hopping as the fundamental transport mechanism in pentacene thin films, and suggests that traps and/or contact effects may strongly influence the observed characteristics. These results also indicate that field-effect transistors may not be appropriate vehicles for illuminating basic transport mechanisms in organic materials.

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Authors

  • S. F. Nelson

  • Y. Y. Lin

  • D. J. Gundlach

  • T. N. Jackson

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