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  • 09월 05일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Effects of microwave-assisted polymerization on the photovoltaic performance of PTB7 solar cell

등록일
2017년 8월 24일 17시 09분 24초
접수번호
2101
발표코드
POLY.O-7 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 16시 : 00분
발표형식
구두발표
발표분야
Polymer Chemistry - Oral Presentation for Young Scholars in Polymer Chemistry
저자 및
공동저자
Minjun Kim, HONG IL KIM1, Sangwon Kim1, Taiho Park1,*
Chemical engineering, Pohang University of Science and Technology, Korea
1Department of Chemical Engineering, Pohang University of Science and Technology, Korea

We report effects of microwave-assisted polymerization on the photovoltaic performance of polymer solar cell using benzodithiophene-based polymer (PTB7) as a donor material. For systematic and comparative study, we synthesized PTB7 polymers through Stille-coupling polymerization under microwave conditions (M-PTB7, Mn = 75 kg mol-1, and D = 2.2) as well as thermal conditions (T-PTB7, Mn = 31 kg mol-1, D = 2.1). Although the microwave-assisted polymerization is a powerful method to increase the Mn of PTB7 without broadening D in a short time, this method decrease the power conversion efficiency from 7.8% (T-PTB7) to 2.8 % (MPTB7). We found that the microwave-assisted polymerization accelerates more structural defects from homo-coupling side reactions, resulting in a significant decrease in JSC and FF values for M-PTB7. The increased abundance of these homo-coupled units under the microwave-assisted conditions was demonstrated by various optical spectroscopy methods and the model reaction study.


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