Journal
ORGANIC ELECTRONICS
Volume 9, Issue 6, Pages 1101-1106Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2008.08.011
Keywords
Tetrathiafulvalene; Band tail; Thin-film transistor; OFET; MTR; Sub-micrometer
Funding
- EU [NMP4-CT-2004-500355]
- DGI Spain [CTQ2006-06333/BQU]
- CIRIT [2005SGR-005951]
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We report on mobilities up to 3.6 cm(2)/V s in organic field-effect transistors (OFETs) with solution-processed dithiophene-and dibenzo-tetrathiafulvatene (DT- and DB-TTF) single crystals as active materials. In the devices, the channel length varies from 100 Pm down to sub 100 nm, and the SiO2 thickness is either 100 nm, 50 nm, or 20 nm. The devices exhibit excellent operation characteristics with an on/off-ratio exceeding 10(6). Temperature dependent measurements between 50 and 400 K reveal a thermally activated transport with increased activation above 200 K. The mobility exhibits exponential activation with two distinct exponents. (C) 2008 Elsevier B.V. All rights reserved.
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