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Temperature- and density-dependent channel potentials in high-mobility organic field-effect transistors
Linköping University, Department of Physics, Chemistry and Biology, Chemical and Optical Sensor Systems. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-7104-7127
University of Cambridge, England.
University of Cambridge, England.
University of Cambridge, England.
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2009 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 80, no 11, 115325Article in journal (Refereed) Published
Abstract [en]

The density-dependent charge-carrier mobility in high-mobility organic field-effect transistors is investigated by simultaneous measurements of the channel potential and the transfer characteristics. By working under ultrahigh-vacuum conditions extrinsic effects due to H(2)O traces could be eliminated. The shape of the channel potential is inconsistent with a density-independent mobility. We find that the variable range hopping model as derived by Vissenberg and Matters for an exponential density of states [Phys. Rev. B 57, 12964 (1998)] consistently describes the data.

Place, publisher, year, edition, pages
American Physical Society , 2009. Vol. 80, no 11, 115325
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Physical Sciences
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URN: urn:nbn:se:liu:diva-118182DOI: 10.1103/PhysRevB.80.115325ISI: 000270383200100OAI: oai:DiVA.org:liu-118182DiVA: diva2:813515
Available from: 2015-05-22 Created: 2015-05-22 Last updated: 2015-06-01

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Kemerink, Martijn
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Chemical and Optical Sensor SystemsThe Institute of Technology
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