Bright Free Exciton Electroluminescence from Mn-Doped Two-Dimensional Layered Perovskites

Liangdong Zhang, Tao Jiang, Chang Yi, Jiquan Wu, Xiao Ke Liu, Yarong He, Yanfeng Miao, Ya Zhang, Huotian Zhang, Xinrui Xie, Peng Wang, Renzhi Li, Feng Gao, Wei Huang, Jianpu Wang