Xiao Liangang, Wang Hongda, Gao Ke, Li Lisheng, Liu Chang, Peng Xiaobin, Wong Wai-Yeung, Wong Wai-Kwok, Zhu Xunjin
State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China.
Institute of Molecular Functional Materials, Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, P. R. China.
Chem Asian J. 2015 Jul;10(7):1513-8. doi: 10.1002/asia.201500382. Epub 2015 Jun 5.
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 (PC71 BM) as the acceptor material and BDTT-BODIPY, FL-BODIPY, and TT-BODIPY as the donor materials, respectively.
硼二吡咯亚甲基（BODIPY）染料具有独特的性质，包括合成简便、吸收系数高、分子轨道离域，以及出色的光化学和热稳定性，使其有望成为有机太阳能电池的材料。因此，在本研究中，合成了三种A-D-A结构的小分子BDTT-BODIPY、FL-BODIPY和TT-BODIPY，其中两个BODIPY受体单元分别与4,8-双（5-（2-乙基己基）噻吩-2-基）苯并[1,2-b:4,5-b]二噻吩（BDTT）、9,9-二辛基-9H-芴（FL）和噻吩并[3,2-b]噻吩（TT）供体核对称共轭。对结构参数的调控显著提高了体异质结有机太阳能电池的性能，基于[6,6]-苯基-C71-丁酸甲酯（PC71BM）作为受体材料，BDTT-BODIPY、FL-BODIPY和TT-BODIPY作为供体材料，其功率转换效率分别为4.75%、1.51%和1.67%。
