Perovskite Light-Emitting Diodes with Near Unit Internal Quantum Efficiency at Low Temperatures

Yarong He, Jiaxu Yan, Lei Xu, Bangmin Zhang, Qian Cheng, Yu Cao, Ju Zhang, Cong Tao, Yingqiang Wei, Kaichuan Wen, Zhiyuan Kuang, Gan Moog Chow, Zexiang Shen, Qiming Peng, Wei Huang, Jianpu Wang