A Benzoselenadiazole-Based Low Band Gap Polymer: Synthesis and Photovoltaic Application

被引:82
作者
Zhou, Erjun [1 ]
Cong, Junzi [1 ]
Hashimoto, Kazuhito [1 ]
Tajima, Keisuke [2 ]
机构
[1] Univ Tokyo, Sch Engn, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan
[2] Japan Sci & Technol Agcy JST, Precursory Res Embryon Sci & Technol PRESTO, Kawaguchi, Saitama 3320012, Japan
关键词
DONOR-ACCEPTOR COPOLYMERS; LIGHT-EMITTING-DIODES; CONJUGATED POLYMER; SOLAR-CELLS; EFFICIENCY; ADDITIVES; SENSORS;
D O I
10.1021/ma302596k
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A novel alternating copolymer with a low band gap (E-g = 1.55 eV), PBDT-DTBSe, based on benzodithiophene (BDT) and benzoselenadiazole (BSe) units with thiophene as a pi-conjugated bridge, was synthesized and characterized. When 1,8-diiodooctane was used as a solvent additive to optimize the mixing morphology, the maximum power conversion efficiency reached by a polymer solar cell based on PBDT-DTBSe/PC70BM was 5.18%, which was slightly higher than that of the benzothiadiazole (BT)-based analogue (5.01%). These results demonstrated the promising effectiveness of benzoselenadiazole as an electron-deficient unit for the design of the donor acceptor photovoltaic polymers.
引用
收藏
页码:763 / 768
页数:6
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