Single‑Layer ZnO Hollow Hemispheres Enable High‑Performance Self‑Powered Perovskite Photodetector for Optical Communication  

作　　者：Xiyan Pan Jianqiang Zhang Hai Zhou Ronghuan Liu Dingjun Wu Rui Wang Liangping Shen Li Tao Jun Zhang Hao Wang 

机构地区：[1]Hubei Key Laboratory of Ferro and Piezoelectric Materials and Devices,School of Microelectronics and Faculty of Physics and Electronic Science,Hubei University,Wuhan 430062,People’s Republic of China

出　　处：《Nano-Micro Letters》2021年第4期259-270,共12页纳微快报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.51972101,11874143);the Natural Science Foundation of Hubei Province(No.2019CFB508);the Application Fundamental Research Project of Wuhan Science and Technology Bureau(No.2019010701011396).

摘　　要：The carrier transport layer with reflection reduction morphology has attracted extensive attention for improving the utilization of light.Herein,we introduced single-layer hollow ZnO hemisphere arrays(ZHAs)behaving light trapping effect as the electron transport layer in perovskite photodetectors(PDs).The singlelayer hollow ZHAs can not only reduce the reflection,but also widen the angle of the effective incident light and especially transfer the distribution of the optical field from the ZnO/FTO interface to the perovskite active layer confirmed by the 3D finitedifference time-domain simulation.These merits benefit for the generation,transport and separation of carriers,improving the light utilization efficiency.Finally,our optimized FTO/ZHA/CsPbBr3/carbon structure PDs showed high self-powered performance with a linear dynamic range of 120.3 dB,a detectivity of 4.2×10^(12) Jones,rise/fall time of 13/28μs and the f_(−3) dB of up to 28 kHz.Benefiting from the high device performance,the PD was demonstrated to the application in the directional transmission of encrypted files as the signal receiving port with super high accuracy.This work uniquely utilizes the features of high-performance self-powered perovskite PDs in optical communication,paving the path to wide applications of all-inorganic perovskite PDs.

关 键 词：Hemisphere array PEROVSKITE PHOTODETECTOR Reflection reduction Optical communication 

分 类 号：TN929.1[电子电信—通信与信息系统] TN15[电子电信—信息与通信工程]