Tunable fabrication of single-crystalline CsPbI_(3) nanobelts and their application as photodetectors  

作　　者：Tao Yang Ya-peng Zheng Kuo-Chih Chou Xin-mei Hou 

机构地区：[1]Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2021年第6期1030-1037,共8页矿物冶金与材料学报（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.51974021 and 51902020);the Fundamental Research Funds for the Central Universities(Nos.FRF-TP-18-045A1 and FRF-TP-19-004B2Z);the National Postdoctoral Program for Innovative Talents(BX20180034);the China Postdoctoral Science Foundation(Grant No.2018M641192).

摘　　要：Lead halide perovskites have received increasing attention recently as a candidate material in various optoelectronic areas because of their high performance as light absorbers.Herein,we report the growth of CsPbI_(3) nanobelts via a solution process.A single-crystalline CsPbI_(3) nanobelt with uniform morphology can be achieved by controlling the amount of PbI_(2).A single-crystalline CsPbI_(3) nanobelt possesses a mean width,length,and thickness of 100 nm,5μm,and 20 nm,respectively.In this work,photodetectors(PDs)based on individual CsPbI_(3) nanobelts are constructed and found to perform well with an external quantum efficiency and responsivity of 2.39×10^(5)% and 770 A/W,respectively.The PDs also show a high detectivity of up to 3.12×10^(12) Jones,which is at par with that of Si PDs.The PDs developed in this work exhibit great promise in various optoelectronic nanodevices.

关 键 词：photodetector cesium lead triiodide perovskite NANOBELT DETECTIVITY 

分 类 号：TN15[电子电信—物理电子学] TB383.1[一般工业技术—材料科学与工程]