標題: Controllable carrier density of pentacene field-effect transistors using polyacrylates as gate dielectrics
作者: Cheng, Jung-An
Chuang, Chiao-Shun
Chang, Ming-Nung
Tsai, Yan-Chu
Shieh, Han-Ping D.
光電工程學系
顯示科技研究所
Department of Photonics
Institute of Display
關鍵字: OTFT;Polyacrylate;Pentacene;PMMA;Dielectric
公開日期: 1-Dec-2008
摘要: We have studied the effect of the chemical structure of dielectrics by evaporating pentacene onto a series of polyacrylates: poly(methylmethacrylate), poly(4-methoxyphenylacrylate), poly(phenylacrylate), and poly(2,2,2-trifluoroethyl methacrylate) in organic thin-film transistors (OTFTs). In top-contact OTFTs, the polyacrylates had a significant effect on field-effect mobilities ranging 0.093 similar to 0.195 cm(2) V-1 s(-1). This variation neither correlated with the polymer surface morphology nor the observed pentacene crystallite size. This result implies that the PTFMA device generates the local electric field that accumulates holes and significantly shifts the threshold voltage and the turn-on voltage to -8.62 V and 3.5 V, respectively, in comparison with those of PMMA devices. (C) 2008 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.orgel.2008.08.004
http://hdl.handle.net/11536/8055
ISSN: 1566-1199
DOI: 10.1016/j.orgel.2008.08.004
期刊: ORGANIC ELECTRONICS
Volume: 9
Issue: 6
起始頁: 1069
結束頁: 1075
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