화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2015년 봄 (04/08 ~ 04/10, 대전컨벤션센터)
권호 40권 1호
발표분야 분자전자 부문위원회 II
제목 Regioregular Low Bandgap Polymer with Controlled Thieno[3,4-b]thiophene Orientation for High-Efficiency Polymer Solar Cells
초록 Organic solar cells (OSCs) have attracted much attention due to light weight, flexibility, and low fabrication cost. Recently, the series of poly(thieno[3,4-b]thiophene)benzothiophene (PTB) copolymers such as PTB7 and PBDTTT-C-T have been developed for high-efficiency PSCs. Although the PTB copolymers possess various merits such as high hole mobility and low bandgap, the PTB copolymers absically possess random structural regioregularity since the TT segment has an asymmetric molecular structure. In this study, we successfully synthesized a regioregular PBDTTT-C-T comprised of TT-BDT-TT-BDT repeating units. The device performance of BHJ OSCs with regioregular PBDTTT-C-T and PC71BM exhibited a power conversion efficiency as high as 7.79%, which was 19% higher than the random PBDTTT-C-T based PSCs.
저자 김홍기, 이윤구
소속 대구경북과학기술원
키워드 thieno[3; 4-b]thiophene; PBDTTT-C-T; regioregularity
E-Mail youngulee@dgist.ac.kr