Corrigendum: Photo-Diodes Based on CH3NH3PbCl3 Perovskite Single Crystals by Epitaxial Growth for Ultraviolet Photo-Detection - Zhao, Jingda; Wang, Xin; Pan, Yuzhu; Xu, Yubing; Li, Yuwei; Chen, Jing; Wu, Jun; Li, Qing; Zhao, Zhiwei; Zhang, Xiaobing; Akram, Javed; Bae, Byung Seong; et al. (Frontiers in Physics, 2021)