Synthesis of a terpolymer containing fluorene, side chain conjugated thiophene and benzothiadiazole and its applications in photovoltaic devices - Liu, Hongli; Qu, Bo; Jian Chen; Cong, Zhiyuan; An, Zhongwei; Chao Gao; Xiao, Lixin; Chen, Zhijian; Qihuang Gong (JOURNAL OF APPLIED POLYMER SCIENCE, 2013)