Bao, Xichang; Zhang, Yongchao; Wang, Junyi; Zhu, Dangqiang; Yang, Chunpeng; Li, Yonghai; Yang, Chunming; Xu, Jintong; Yang, Renqiang, High extinction coefficient thieno[3,4- b ]thiophene-Based copolymer for efficient fullerene-free solar cells with large current density, Chemistry of Materials, 2017, 29(16): 6766-6771.
https://pubs.acs.org/doi/10.1021/acs.chemmater.7b01650