期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 10, 期 7, 页码 1513-1518出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201500382
关键词
BODIPY; bulk heterojunction; donor-acceptor systems; small molecules; solar cells
资金
- International Science&Technology Cooperation Program of China [2013DFG52740, 2010DFA52150]
- National Natural Science Foundation of China [51473053, 51073060, 91222201]
- Areas of Excellence Scheme, University Grants Committee, Hong Kong [AoE/P-03/08]
- Hong Kong Baptist University [FRG2/13-14/058, FRG2/14-15/034, FRG1/14-15/058]
The unique properties of boron dipyrromethene (BODIPY) dyes including facile synthesis, high absorption coefficients, and delocalized molecular orbitals as well as excellent photochemical and thermal stability, make them promising as materials for organic solar cells. Accordingly, in this study three A-D-A structural small molecules of BDTT-BODIPY, FL-BODIPY, and TT-BODIPY have been synthesized, in which two BODIPY acceptor units are symmetrically conjugated to 4,8-bis(5-(2-ethylhexyl) thiophen-2-yl)benzo[1,2-b:4,5-b]dithiophene (BDTT), 9,9-dioctyl-9H-fluorene (FL), and thieno[3,2-b]thiophene (TT) donor cores, respectively. The manipulation of the structural parameters significantly improves the performances of the BHJ OSCs, which show power conversion efficiencies of 4.75%, 1.51%, and 1.67% based on [6,6]-phenyl C-71-butyric acid methyl ester (PC71BM) as the acceptor material and BDTT-BODIPY, FL-BODIPY, and TT-BODIPY as the donor materials, respectively.
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