Photo-Diodes Based on CH3NH3PbCl3 Perovskite Single Crystals by Epitaxial Growth for Ultraviolet Photo-Detection
Jingda Zhao, Xin Wang, Yuzhu Pan, Yubing Xu, Yuwei Li, Jing Chen, Jun Wu, Qing Li, Zhiwei Zhao, Xiaobing Zhang, Javed Akram, Byung Seong Bae, Haining Yang, Wei Lei
Abstract
Organic-inorganic hybrid methylammonium lead halide perovskite MAPbX3 (where MA = CH 3 NH 3 , and X = Cl, Br, I) single crystals are potential semiconductors for photo-detection due to their excellent optoelectronic performance. In particular, MAPbCl 3 single crystal is a wide-band-gap (2.9 eV) semiconductor which is suitable for ultraviolet (UV) detection. In this work, n − -n + photo-diodes are fabricated through solution-processed epitaxial growth, growing Bi-doped MAPbCl 3 epitaxial layer on MAPbCl 3 single crystal substrate. The epitaxial layer effectively improves the interface between n − -type and n + -type layers and leads to low dark current. This work provides useful information for UV detection based on perovskites.