Highly Efficient Solar Cells Based on the Copolymer of Benzodithiophene and Thienopyrroledione with Solvent Annealing - Qu, Bo; Tian, Di; Cong, Zhiyuan; Weiping Wang; An, Zhongwei; Chao Gao; Gao, Zhi; Yang, Hongsheng; Zhang, Lipei; Xiao, Lixin; Chen, Zhijian; Qihuang Gong (JOURNAL OF PHYSICAL CHEMISTRY C, 2013)