Light quasiparticles dominate electronic transport in molecularcrystal field-effect transistors
Journal Article
·
· Physical Review Letters
We report on an infrared spectroscopy study of mobile holesin the accumulation layer of organic field effect transistors based onrubrene single crystals. Our data indicate that both transport andinfrared properties of these transistors at room temperature are governedby light quasiparticles in molecular orbital bands with the effectivemasses m* comparable to free electron mass. Furthermore, the m* valuesinferred from our experiments are in agreement with those determined fromband structure calculations. These findings reveal no evidence forprominent polaronic effects, which is at variance with the common beliefsof polaron formation in molecular solids.
- Research Organization:
- COLLABORATION - UCSD
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 927388
- Report Number(s):
- LBNL-63226; PRLTAO; R&D Project: 458121; BnR: KC0204016; TRN: US200811%%136
- Journal Information:
- Physical Review Letters, Vol. 99; Related Information: Journal Publication Date: July 6, 2007; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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