Novel A-D-A type small molecules with β-alkynylated BODIPY flanks for bulk heterojunction solar cells
作者:Junxu Liao、Yongjun Xu、Hongbin Zhao、Qiao Zong、Yutang Fang
DOI:10.1016/j.orgel.2017.06.054
日期:2017.10
strong fluorescence quenching. The molecules showed relatively low HOMO ranging from −5.02 to −5.24 eV as estimated from cyclic voltammetry measurements. Interestingly, B-BDP with BDT as donor exhibits more obviously red-shifted absorption in the solid state compared to F-BDP, C-BDP and P-BDP. Furthermore, the solution-processed bulk-heterojunction organic solar cell based on B-BDP/PC71BM present superior
设计并设计了一系列新颖的具有BODIPY的ADA型小分子,它们通过炔基与芴,咔唑,苯并二噻吩和吩噻嗪等各种电子供体单元分别连接,分别为F-BDP,C-BDP,B-BDP和P-BDP。合成的。引入炔基桥导致分子吸收光谱扩展到具有高摩尔消光系数(10 5 cm -1 M -1)和强荧光猝灭的320–700 nm范围。根据循环伏安法测量估计,分子显示出相对较低的HOMO,范围为-5.02至-5.24 eV。有趣的是,B-BDP与F-BDP,C-BDP和P-BDP相比,以BDT为供体的固态吸收显示出更明显的红移。此外,基于B-BDP / PC 71 BM的固溶体异质结有机太阳能电池具有优异的电荷传输性能和更有利的纳米级形态,与其他同类产品相比,具有显着更高的J sc为11.84 mA cm 2和FF。因此,PCE达到了4.65%的更高值,这是有史以来基于BODIPY的有机太阳能电池中最好的值之一。