Bismuth doped lead-free two-dimensional tin based halide perovskite single crystals

查看全文 作　　者：Ruiling [1,2]Zhang;Xin [1,2]Mao;Pengfei [1,2]Cheng;Yang [1]Yang;Songqiu [1]Yang;Tuerdi [3]Wumaier;Weiqiao [1]Deng;Keli [1]Han

机构地区：[1]State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;[2]University of the Chinese Academy of Sciences,Beijing 100049, China;[3]Department of Physics, Xinjiang Institute of Engineering,Urumqi 830091, Xinjiang, China

出　　处：《Journal of Energy Chemistry》索引2019年第28卷第9期,共6页

基　　金：supported by the National Key Research and Development Program of China (Grant No: 2016YFE0120900 and 2017YFA0204800);the National Natural Science Foundation of China (No.21,703,244, 21,403,226, and 21,533,010);DICP DMTO201601;DICP ZZBS201703;the Science Challenging Program (JCKY2016212A501);DICP Outstanding Postdoctoral Foundation (2016YB09);the China Postdoctoral Science Foundation (2017M611276) 摘　　要：Heterovalent-metal doping is an efficient tool to tune the optoelectronic properties of the famous halide perovskites.Previous studies have focused on the heterovalent-doping in three-dimensional(3D) halide perovskites.However, there is a lack of such doping in two-dimensional perovskites which possess unique optoelectronic properties and improved chemical stability as compared to 3D analogues.Here, we present successful doping of Bismuth into the lattice of lead-free, two-dimensional perovskite PEA2SnBr4 single crystals.Structural characterizations demonstrate that the doped crystals possess identical crystal structure and layered morphology with the pristine one.Intriguingly, we find the PL peak and spectral shape can be tailored by tuning the concentration of Bi dopants.Femtosecond transient absorption spectroscopy is performed to understand the underlying mechanism related to tunable PL behaviors, and a clear picture of the Bismuth-doping impact is provided. 关键词：Heterovalent-metal doping Photoluminescence Self-trapped EXCITONS FEMTOSECOND transient absorption spectra Global analysis FIT

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Bismuth doped lead-free two-dimensional tin based halide perovskite single crystals

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