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학술지 Synergistic Effect of Polymer and Oligomer Blends for Solution-processable Organic Thin-film Transistors
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저자
임은희, 정병준, Masayuki Chikamatsu, Reiko Azumi, Kiyoshi Yase, 도이미, 심홍구
발행일
200812
출처
Organic Electronics, v.9 no.6, pp.952-958
ISSN
1566-1199
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.orgel.2008.06.018
협약과제
07IB1100, OTFT 소자 신뢰성 향상 기술 개발, 도이미
초록
The thin-film morphologies and thin-film transistor (TFT) characteristics of a series of binary blends of poly(9,9??-dioctylfluorene-alt-bithiophene) (F8T2) and 慣,??-dihexylquarterthiophene (DH4T) are reported. The blends of F8T2 and DH4T exhibit good solubility and produce TFT devices with better performances than F8T2 and DH4T devices. The 50% DH4T blend device was found to have a hole mobility of 0.011 cm 2 V-1 s-1, which is four times higher than the mobility of the F8T2 device, with a high-on/off ratio of about 105 and a low-off current of 17 pA. The polymer and oligomer domains are phase-separated with large domain size and arranged in characteristic molecular alignments. It was found that carrier transport in the blend systems is mainly controlled by the polymer component, and that the nature of the blended oligomer affects the OTFT performance of the blends. © 2008 Elsevier B.V. All rights reserved.
키워드
Blend, Charge carrier mobility, Polyfluorene, Thin-film transistor, Thiophene
KSP 제안 키워드
Charge carrier mobility, First Stokes(S1), Good solubility, Hole mobility, Large domain, Molecular alignment, Off Current, Organic thin-film transistors, Thin-Film Transistor(TFT), binary blends, carrier transport