Indirect Bandgap Emission of the Metal Halide Perovskite FAPbI₃ at Low Temperatures

Cong Tao, Yingqiang Wei, Ju Zhang, Yu Cao, Saixue Wang, Lei Xu, Kaichuan Wen, Jingmin Wang, Zhiyuan Kuang, Xing Wang, Wei Huang, Qiming Peng, Jianpu Wang