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학술지 Controlled Charge Transport by Polymer Blend Dielectrics in Top-Gate Organic Field-Effect Transistors for Low-Voltage-Operating Complementary Circuits
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백강준, 김동윤, 김주환, 한현, 정순원, 김태욱, 강민지, Antonio Facchetti, 홍성규, 김동유, 노용영
ACS Applied Materials & Interfaces, v.4 no.11, pp.6176-6184
American Chemical Society(ACS)
12VB1300, 에너지 절감을 위한 7인치기준 2W급 환경적응 디스플레이 신모드 핵심 원천 기술 개발, 추혜용
We report here the development of high-performance p- and n-channel organic field-effect transistors (OFETs) and complementary circuits using inkjet-printed semiconducting layers and high-k polymer dielectric blends of poly(vinylidenefluoride-trifluoroethylene) (P(VDF-TrFE)) and poly(methyl methacrylate) (PMMA). Inkjet-printed p-type polymer semiconductors containing alkyl-substituted thienylenevinylene (TV) and dodecylthiophene (PC12TV12T) and n-type poly{[N,N'-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2, 6-diyl]-alt-5,5'-(2,2'-dithiophene)} (P(NDI2OD-T2)) OFETs typically show high field-effect mobilities (μFET) of 0.2-0.5 cm2/(V s), and their operation voltage is effectively reduced to below 5 V by the use of P(VDF-TrFE):PMMA blends. The main interesting result is that the OFET characteristics could be tuned by controlling the mixing ratio of P(VDF-TrFE) to PMMA in the blended dielectric. The μFET of the PC12TV12T OFETs gradually improves, whereas the P(NDI2OD-T2) OFET properties become slightly worse as the P(VDF-TrFE) content increases. When the mixing ratio is optimized, well-balanced hole and electron mobilities of more than 0.2 cm2/(V s) and threshold voltages below 짹3 V are obtained at a 7:3 ratio of P(VDF-TrFE) to PMMA. Low-voltage-operated (~2 V) printed complementary inverters are successfully demonstrated using the blended dielectric and exhibit an ideal inverting voltage of nearly half of the supplied bias, high voltage gains of greater than 25, and excellent noise margins of more than 75% of the ideal values. © 2012 American Chemical Society.
charge transport, conjugated polymers, organic field effect transistors, P(VDF-TrFE), polymer blend, polymer dielectric
KSP 제안 키워드
Charge transport, Complementary inverter, Conjugated polymer(PFO-co-MEH-PPV), Field effect transistors(Substrate temperature), Field-effect transistors(FETs), High Voltage, High performance, High-k polymer dielectric, Ideal values, Mixing ratio, N-channel