Over 14% efficiency all-polymer solar cells enabled by a low bandgap polymer acceptor with low energy loss and efficient charge separation

Qunping Fan, Qiaoshi An^*, Yuanbao Lin, Yuxin Xia, Qian Li, Ming Zhang, Wenyan Su, Wenhong Peng, Chunfeng Zhang, Feng Liu, Lintao Hou, Weiguo Zhu, Donghong Yu, Min Xiao, Ellen Moons, Fujun Zhang^*, Thomas D. Anthopoulos, Olle Inganäs, Ergang Wang^*