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제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis of Thienylenevinylene based Copolymers with High Mobility Ambipolar Charge Transport in Organic Thin-Film Transistors

등록일
2012년 2월 21일 21시 07분 04초
접수번호
1315
발표코드
POLY.P-73 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
고분자화학
저자 및
공동저자
김주환, 김동유1
광주과학기술원 신소재공학부, Korea
1광주과학기술원 신소재공학과,나노바이오재료전자공학과, Korea
Thienylenevinylene (TV) based materials can show a high charge-carrier mobility as a result of a high planarity by introduction of vinylene with double bond character between thiophene units and a large intermolecular attractive force by the thiophene. The presence of vinylene linkages as a conjugated spacer in a backbone of aromatic polymers can increase the degree of coplanarity by the limitation of the rotational disorder inherent between consecutive bulky aromatic units. Therefore, the introduction of a vinylene moiety between the thiophene units resulting in a TV is an attractive building block for the active layer of OTFTs or organic photovoltaics (OPVs). We synthesized alkyl-substituted TV based donor-acceptor type copolymers using Grignard, Kumada, and Stille coupling reactions. These polymers showed crystallinity and ambipolar charge transport property. This ambipolar polymers showed good hole and electron mobilities (μh= 0.75 cm2/Vs and μe= 0.06 cm2/Vs). In addition, these polymers showed excellent solubility in common organic solvents such as chloroform and chlorobenzene (30~50 mg/mL at 25 ℃) because of sufficient solubilizing groups. To understand the nature of polymer structure, charge transport and electronic properties, these polymers were investigated using X-ray diffraction, Raman spectroscopy, quantum calculation and morphological study. Finally, CMOS-like organic integrated circuits (ICs) were demonstrated by solution process and optimized ICs exhibit ideal behavior characterized by very high voltage gains (>50) and high noise margin (~75% of 1/2VDD).

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