(261) Effects of BTA2 as the third component on the charge carrier generation and recombination behavior of PTB7:PC71BM photovoltaic system Leijing Liu1, Hao Zhang1, Bo Xiao2, Yang Liu1, Bin Xu1, Chen Wang3, Shanpeng Wen3, Erjun Zhou2, Gang Chen4, Chan Im5, Wenjing Tian1* Front. Chem. Sci. Eng., 2021, 15(1), 127-137.