文献类型：期刊文献

英文题名：Fluoro-benzoselenadiazole-based low band gap polymers for high efficiency organic solar cells

作者：Li, Yongxi[1];Pan, Zhe[1];Miao, Lei[2];Xing, Ying[1];Li, Chao[1];Chen, Yu[1]

机构：[1]E China Univ Sci & Technol, Inst Appl Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China

年份：2014

卷号：5

期号：2

起止页码：330

外文期刊名：POLYMER CHEMISTRY

收录：;EI(收录号：20135217119456);WOS:【SCI-EXPANDED(收录号:WOS:000328647200008)】；

基金：The authors are grateful for the financial support of the Fundamental Research Funds for the Central Universities and the Shanghai Leading Talents program.

语种：英文

外文关键词：Energy gap - Molecular orbitals - Heterojunctions - Open circuit voltage - Organic solar cells

摘要：Low band gap polymers are of great interest for future applications in solar cells. By using monofluoro-2,1,3-benzoselenadiazole (FBSe) as the electron acceptor and benzodithiophene (BDT) or indacenodithiophene (IDT) as the electron donor, two novel FBSe-based polymers, PBDT-T-FBSe and PIDT-T-FBSe, were synthesized via a microwave-assisted palladium-catalyzed Stille polymerization. Both of the polymers exhibited broad absorption and lower highest occupied molecular orbital (HOMO) energy levels, which contribute to the high short current density (J(sc)) and open circuit voltage (V-oc). Higher power conversion efficiencies of 5.00% for PBDT-T-FBSe and 4.65% for PIDT-T-FBSe were achieved in a bulk heterojunction (BHJ) photovoltaic device with a configuration of ITO/PEDOT:PSS/polymer: PC71BM/bis-C-60/Ag under the illumination of AM1.5G at 100 mA cm(-2). These results demonstrate the importance of FBSe as an electron-deficient unit in the design of donor-acceptor photovoltaic polymers.