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  • 02월 20일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제113회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis and Properties of Conjugated Polymers Based on Tetrafluorophenylene for Organic Photovoltaics

등록일
2014년 2월 13일 16시 09분 10초
접수번호
1072
발표코드
ORGN.P-775 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 16일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
유기화학
저자 및
공동저자
백지연, 서홍석1,*
부산대학교 자연과학대학/화학과, Korea
1부산대학교 화학과, Korea
Recently it appears that fluorinated polymer also demonstrates a noticeably improved short circuit current (Jsc) and/or fill factor (FF) in BHJ devices as opposed to those of the nonfluorinated analogue polymer-based devices. To study more this effect, we introduced 1,4-dibromotetra-fluorobenzene units ,which is the new strong electron withdrawing unit, adjacent to the donor moiety. We synthesized the new conjugated polymers; HS-5477, HS-5478, HS-5479, HS-5480, HS-5486, HS-5487, HS-5488 and HS-5489 which were synthesized by Suzuki coupling reaction and Stille polymerization. The UV-vis absorption onset of HS-5477, HS-5478, HS-5479 and HS-5480 were around 700 nm and their optical band gaps were about 1.60 eV. The range of the UV edges of HS-5486, HS-5487, HS-5488 and HS-5489 was from 760 to 890 nm and their optical band gaps were about 1.2 eV. The HOMO energy levels of four polymers based on carbazole unit (HS-5477, HS-5478, HS-5479 and HS-5480) were at 5.5 eV, their LUMO energy levels were at -3.8 eV, corresponding to the electrochemical band gap of around 1.6 eV. And the other four polymers based on benzodithiophene unit (HS-5486, HS-5487, HS-5488 and HS-5489) showed -5.5 ~ -5.7 eV of HOMO energy levels and their LUMO energy levels were at -4.2 ~ -4.4 eV, giving the electrochemical band gap of around 1.2 eV. Among the polymers, HS-5480 exhibited the greatest performance with Voc of 0.71 V, Jsc of 8.68 mA/cm2 and FF of 0.44, giving the power conversion efficiency of 2.71%.

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