Department of Chemistry
A-D-A type small molecules based on boron dipyrromethene for solution-processed organic solar cells
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 C71-butyric acid methyl ester (PC71BM) as the acceptor material and BDTT-BODIPY, FL-BODIPY, and TT-BODIPY as the donor materials, respectively.
BODIPY, bulk heterojunction, donor–acceptor systems, small molecules, solar cells
Source Publication Title
Chemistry - An Asian Journal
Link to Publisher's Edition
Xiao, Liangang, Hongda Wang, Ke Gao, Lisheng Li, Chang Liu, Xiaobin Peng, Wai Yeung Wong, Rick Wai Kwok Wong, and Xunjin Zhu. "A-D-A type small molecules based on boron dipyrromethene for solution-processed organic solar cells." Chemistry - An Asian Journal 10.7 (2015): 1513-1518.