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Perovskite Photodetectors based on CH 3 NH 3 PbI 3 Single Crystals
Author(s) -
Qin Xiang,
Yao Yifan,
Dong Huanli,
Zhen Yonggang,
Jiang Lang,
Hu Wenping
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201600430
Subject(s) - photodetector , tetragonal crystal system , materials science , crystallite , perovskite (structure) , nanowire , optoelectronics , phase (matter) , nanotechnology , crystallography , metallurgy , chemistry , organic chemistry
As very important light‐harvesting materials, organic–inorganic perovskites have showed an alluring prospect in optoelectronic devices. However, most of the perovskite devices, such as photodetectors reported recently, are based on the polycrystalline films of perovskites, and the large grain boundaries and amounts of defects existing in films are unfavorable for the further improvement of device performance. Herein, high‐quality single crystals of CH 3 NH 3 PbI 3 were successfully prepared through a simple solution immersing method. The obtained CH 3 NH 3 PbI 3 crystals showed the morphologies of nanowires and nanoplates, which were confirmed to belong to the same tetragonal phase. Both nanowire‐ and nanoplate‐based photodetectors exhibited improved performance over CH 3 NH 3 PbI 3 polycrystalline thin films, with an on/off ratio approaching 10 3 , which is one of the highest values reported so far for perovskite photodetectors.