High-performance 1D CsPbBr_(3)/CdS photodetectors  

作　　者：Zhi-Lin Xiang Qiu-Hong Tan Ting Zhu Pei-Zhi Yang Yan-Ping Liu Ying-Kai Liu Qian-Jin Wang 

机构地区：[1]College of Physics and Electronic Information,Yunnan Normal University,Kunming 650500,China [2]Yunnan Provincial Key Laboratory for Photoelectric Information Technology,Yunnan Normal University,Kunming 650500,China [3]Key Laboratory of Advanced Technique&Preparation for Renewable Energy Materials,Ministry of Education,Yunnan Normal University,Kunming 650500,China [4]Hunan Key Laboratory for Super-Microstructure and Ultrafast Process,School of Physics and Electronics,Central South University,Changsha 410083,China

出　　处：《Rare Metals》2024年第11期5932-5942,共11页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.11864046 and 11764046);the Basic Research Program of Yunnan Province(Nos.202001AT070064 and 202101AT070124);Spring City Plan:the Highlevel Talent Promotion and Training Project of Kunming(No.2022SCP005);Yunnan Expert Workstation(No.202205AF150008)。

摘　　要：The emergence of all-inorganic perovskite CsPbBr_(3)has ignited significant interest in optoelectronic devices,However,CsPbBr_(3)thin film-based photodetectors face performance limitations due to grain boundaries and defect density.To address these challenges,we introduce a novel typeⅡheterojunction photodetector utilizing CsPbBr_(3)micro wires(MWs)and CdS nanoribbons(NBs).Remarkably,this photodetector exhibits exceptional characteristics:a high on/off current ratio(1.07×10^(5)),a responsivity of up to 1.35×10^(4)A·W^(-1),specific detectivity of 5.94×10^(15)Jones,external quantum efficiency of2.83×10^(4)%and rapid response/recovery time(400μs/3 ms).These superior performances stem from the exceptional crystalline quality of CsPbBr_(3)MWs and CdS NBs,coupled with the establishment of a typeⅡband alignment at their interface.This configuration enables efficient carrier separation while suppressing recombination.Importantly,1D CsPbBr_(3)MW/CdS NB heterojunction photodetectors demonstrate reliable imaging capabilities under visible light illumination.Our findings present an innovative solution for high-performance perovskite-based photodetectors,holding promise for future commercial applications.

关 键 词：All-inorganic perovskite PHOTODETECTORS Interface coupling Electric charge transfer 

分 类 号：TN36[电子电信—物理电子学] TB34[一般工业技术—材料科学与工程]