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  • 09월 08일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Direct C-H arylation reaction for synthesis low band gap alternating polymers and small molecules and their photovoltaic performance

2015년 8월 27일 15시 00분 30초
POLY.O-4 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 09시 : 45분
고분자화학 - Oral Presentation for Young Polymer Scientists
저자 및
Gamal Mohamed, 이재석1,*
광주과학기술원(GIST) 신소재공학부, Egypt
1광주과학기술원(GIST) 신소재공학과, Korea
The C-H arylation reaction has been used for synthesis new (DD`AD`DA`)-constituted conjugated polymers with the aid of Pd(OAc)2/Bu4NBr catalytic system. The synthesis methodology avoided the drawbacks of Stille and Suzuki coupling and obtained high yields. All of the new polymers possessed broader absorption windows with low energy band-gaps (1.34?1.64 eV), as well as low-lying HOMO energy levels. The prescreening of these polymers as an active material in bulk heterojunction solar cells was investigated and a power conversion efficiency of 2.36% was achieved. Also, series of small molecules based on the [A`(D`AD)2]architecture was developed using selective direct heteroarylation. The new small molecules bear two different acceptors and/or donors, which led to decrease the electron band gap and improve the strength of the push?pull system as well as the amount of intramolecular charge transfer from donor to acceptor units. All small molecules showed broad absorption spectra with optical band gaps, which were estimated to be in the range of 1.72?1.29 eV. The EHID(EDBTT)2:PC71BM-based solar cells reached a maximum PCE of 3.24%.