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제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis and Photovoltaic Properties of Conjugated Copolymers PCDTMBIs Based on poly(N-9’-heptadecanyl- 2,7-carbazole-alt-5,5-(4’,7’-di-2-thienyl-2’,1’,3’-benzothiadiazole)) and Various Thiophene

등록일
2012년 2월 16일 15시 59분 21초
접수번호
1130
발표코드
ORGN.P-901 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
유기화학
저자 및
공동저자
박혜지, 심주영, 송수희, 진영읍1, 서홍석
부산대학교 화학과, Korea
1부경대학교 공업화학과, Korea
Dimethyl-2H-benzimidazole unit was designed to substitute the BT unit of poly(N-9’-heptadecanyl- 2,7-carbazole-alt-5,5-(4’,7’-di-2-thienyl-2’,1’,3’-benzothiadiazole))(PCDTBT). A series of new semiconducting polymers with 2,2-dimethyl-2H-benzimidazole, 9-heptadecanyl-9H-carbazole, and thiophene (or bithiophene) units was synthesized using Stille polymerization to generate PCDTMBIs (or PCBBTMBIs). In dimethyl- 2H-benzimidazole, the sulfur at 2-position of BT unit was replaced with dialkyl substituted carbon, while keeping the 1,2-quinoid form, to improve the solubility of the polymers. The absorption spectra of PCDTMBIs with thiophene units exhibit two maximum peaks at about 430 and 613?645 nm in solution. The solutions of PCBBTMBIs show two absorption peaks at about 445?456 and 630?645 nm which is red-shifted about 20 nm when compared with PCDTMBIs caused by the introduction of bithiophene units. In most efficient polymer PCBBTMBI3, the device annealed at 100 ℃ for 10 min demonstrated a VOC value of 0.60 V, a JSC value of 4.31 mA/cm2, and a FF of 0.35, leading to the power conversion efficiency (PCE) of 0.91%, under white light illumination (AM 1.5 G and 100 mW/cm2).

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