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 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.
Schön
J H
JH
Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974, USA.
Kloc
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C
Batlogg
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