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Low-temperature architecture of a cubic-phase CsPbBr3 single crystal for ultrasensitive weak-light photodetectors
Xiangfeng Wei1, Han Liu1, Zhixiang Zhang2
1Future Energy Laboratory, School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China. liujh@hfut.edu.cn.
Chemical Communications (Cambridge, England)
|July 16, 2021
Abstract:
We present the first report of a water-regulated method for obtaining a cubic-phase CsPbBr3 single crystal that could be frozen at low temperature with a CsBr/PbBr2 ratio of 1 : 1. The cubic CsPbBr3 single-crystal photodetector exhibits a superior responsivity of 278 A W-1, an EQE of 6.63 × 104%, and an ultrahigh detectivity of 4.36 × 1013 Jones under low-power 520 nm irradiation at 3 V.
