Triplet exciton formation for non-radiative voltage loss in high-efficiency nonfullerene organic solar cells

Zeng Chen, Xu Chen, Ziyan Jia, Guanqing Zhou, Jianqiu Xu, Yuexia Wu, Xinxin Xia, Xufeng Li, Xuning Zhang, Chao Deng, Yuan Zhang, Xinhui Lu, Weimin Liu, Chunfeng Zhang, Yang Yang, Haiming Zhu