Universal crossover from band to hopping conduction in molecular organic semiconductors

Authors
Schon, JH Kloc, C Batlogg, B
Citation
Jh. Schon et al., Universal crossover from band to hopping conduction in molecular organic semiconductors, PHYS REV L, 86(17), 2001, pp. 3843-3846
Citations number
29
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
17
Year of publication
2001
Pages
3843 - 3846
Database
ISI
SICI code
0031-9007(20010423)86:17<3843:UCFBTH>2.0.ZU;2-D
Abstract
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 se veral thousand cm(2)/V s at low temperature to an incoherent hopping motion at high temperatures is observed. This is attributed to the localization o f the charge carrier due to increased electron-phonon interaction and, fina lly the formation of a lattice polaron.