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On the mechanism of charge transport in pentacene
van Laarhoven, Hendrik A.
Flipse, Cees F. J.
Jurchescu, O. D.
Palstra, T. T. M.
University of Exeter; Eindhoven University of Technology; FOM Institute for Atomic and Molecular Physics, Amsterdam; Università di Bologna; University of Groningen; University of Warwick
Journal of Chemical Physics
American Institute of Physics
Terahertz transient conductivity measurements are performed on pentacene single crystals, which directly demonstrate a strong coupling of charge carriers to low frequency molecular motions with energies centered around 1.1 THz. We present evidence that the strong coupling to low frequency motions is the factor limiting the conductivity in these organic semiconductors. Our observations explain the apparent paradox of the “bandlike” temperature dependence of the conductivity beyond the validity limit of the band model.
Copyright © 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Chemical Physics 129 (2008) and may be found at http://link.aip.org/link/?JCPSA6/129/044704/1
129 (4), article 044704