Journal
ORGANIC ELECTRONICS
Volume 10, Issue 1, Pages 194-198Publisher
ELSEVIER
DOI: 10.1016/j.orgel.2008.09.005
Keywords
Organic thin-film transistor; Pentacene; Low voltage; Polymer dielectric; High mobility; Flexible
Funding
- LG Display
- Brain Korea 21
- Ministry of Knowledge Economy of Korean government
- KOSFFL
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We report on the fabrication of pentacene-based thin-film transistors (TFTs) with a 230 nm-thick double polymer dielectric composed of 30 nm-thin low-k poly-4-vinyphenol (PVP) and 200 nm-thick high-k poly(vinylidene fluoride/trifluoroethylene) [P(VDF-TrFE)] dielectric on polyethersulfone (PES) films. Our 230 nm-thick double (high-k/low-k) polymer showed a good dielectric strength of similar to 2 MV/cm, a high capacitance of 26 nF/cm(2) with k = similar to 7. Based on this double polymer dielectric, our flexible pentacene TFT displayed a high saturation mobility of 1.22 cm(2)/V s, a threshold voltage of -2.5 V, and on/off ratio of 10(3) stably operating under -5V. (C) 2008 Elsevier B.V. All rights reserved.
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