화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터)
권호 44권 2호
발표분야 분자전자 부문위원회 II
제목 A new D-D type conjugated polymer containing a fused selenophene unit for organic field effect transistors
초록 Extended π-conjugated system is one of most common strategy to enhance the charge carrier mobility in organic electronics. We synthesized a new conjugated polymer (PDSSTV) with a fused-ring-structure, diseleno[3,2-b:2',3'-d]selenophene (DSS). The optical band gap of PDSSTV was found to be 1.70 eV in both solution and film due to its pre-aggregated state even in solution using UV-Vis absorption spectroscopy. Density functional theory (DFT) analysis revealed a twisted conformation of PDSSTV arising from the large size of Selenium in DSS. Upon thermal annealing at 250℃, the intensity of the out of plane order diffraction peak was greatly increased and the crystalline coherence length was also improved in both (100) lamella d-spacing and (010) π-π stacking directions using GIXD analysis. The charge carrier mobility of PDSSTV was probed by fabricating OFETs with a top-gate/bottom contact (TG/BC) architecture to obtain 2 cm2 V-1 s-1 under relatively low operating voltage of -30 V.
저자 김인복1, 장수영1, 강민지2, Fei Zhuping3, 정은환4, McCarthy-Ward Thomas3, 임대희1, 김연주1, Mathur Sanjay4, Heeney Martin3, 김동유1
소속 1광주과학기술원, 2한국과학기술(연), 3Imperial College London, 4Univ. of Cologne
키워드 conjugated polymer; selenophene; organic field effect transistor
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