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Conference Paper Plastic-Based Organic Thin-Film Transistors Using Solution-Processed Nanocomposite Insulators
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Authors
Gi Heon Kim, Sung Min Yoon, Hyoc Min Youn, Byung Uk Kim
Issue Date
2009-07
Citation
Advanced Display Materials and Devices (ADMD) 2009, pp.96-96
Language
English
Type
Conference Paper
Project Code
09MB4400, 플렉시블 디스플레이용 소자 공정 및 소자 최적화 기술개발, Gi Heon Kim
Abstract
Organic thin-film transistors (OTFTs) with low-temperature processing, simple structure and mechanical flexibility are of interest for a variety of large-area electronic applications, including display switch, display driver, photovoltaic, radio-frequency identification (RFID) circuitry, and chemical sensor [1][2][3]. However, conventional OTFTs with organic gate insulators show high operating voltages due to the low charge carrier mobilities of organic semiconductors, which are difficult to apply display drive that require high current output. To overcome this problem, chemically and thermally stable, durable, solution-processable photosensitive dielectric materials having high-dielectric (high-k) constants are in great demand for fabrication of OTFTs.In the present study, we prepared novel photosensitive nanocomposite and investigated their film properties. We fabricated top-contact OTFTs with the composite dielectrics, and investigated the relationship between electrical performance of the OTFT and the film properties of these nanocomposite layers.We prepared four film structures with the photo-cured films of differencing ATO contents: P-NA0, the pristine film without ATO nanoparticles (30% w/w); P-NA1, P-NA0 (26% w/w)/ATO(0.86% w/w); P-NA2, P-NA0 (27.8% w/w)/ATO(1.83% w/w); P-NA3, P-NA0 (30.0% w/w)/ATO(3.0% w/w). It was observed that the prepared nanocomposite films blended with ATO nanoparticles showed good insulation behavior. This method offers a new, simple and convenient way to fabricate dielectrics with both a higher dielectric constant and photosensitivity. Table 1 lists the surface roughness and dielectric constants of these four films.
KSP Keywords
ATO nanoparticles, Charge carrier mobility, Chemical sensors, Composite dielectrics, Dielectric Constant, Dielectric materials, Display driver, Gate insulator, High current, High-K, Low temperature(LT)