Universal crossover from band to hopping conduction in molecular organic semiconductors

The charge transport in a variety of herringbone-stacked organic molecular semiconductors is investigated in the temperature range from 10 to 550 K. A crossover from coherent bandlike charge transport with mobilities up to several thousand cm (2)/V s at low temperature to an incoherent hopping motio...

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Bibliographic Details
Published in:Physical review letters 2001-04, Vol.86 (17), p.3843-3846
Main Authors: Schön, J H, Kloc, C, Batlogg, B
Format: Article
Language:English
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Summary:The charge transport in a variety of herringbone-stacked organic molecular semiconductors is investigated in the temperature range from 10 to 550 K. A crossover from coherent bandlike charge transport with mobilities up to several thousand cm (2)/V s at low temperature to an incoherent hopping motion at high temperatures is observed. This is attributed to the localization of the charge carrier due to increased electron-phonon interaction and, finally, the formation of a lattice polaron.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.86.3843