The phosphorescence emission in undoped lead-halide Cs4PbBr6 single crystals at low temperature

被引:6
|
作者
Li, Yang [1 ,2 ]
Chen, Liang [3 ,4 ]
Liu, Bo [5 ]
Ruan, Jinlu [3 ,4 ]
Liu, Jinliang [3 ,4 ]
Ouyang, Xiaoping [3 ,4 ]
Xu, Qiang [1 ]
机构
[1] Nanjing Univ Aeronaut & Astronaut, Dept Nucl Sci & Engn, Nanjing 211106, Peoples R China
[2] Xijing Univ, Sch Sci, Shaanxi Engn Res Ctr Controllable Neutron Source, Xian 710123, Peoples R China
[3] Northwest Inst Nucl Technol, State Key Lab Intense Pulsed Radiat Simulat, Xian 710024, Peoples R China
[4] Northwest Inst Nucl Technol, Effect & Radiat Detect Res Ctr, Xian 710024, Peoples R China
[5] Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China
基金
中国国家自然科学基金;
关键词
Inorganic perovskite; X-ray activated persistent radioluminescence; Low temperature; BEAM-INDUCED TRANSFORMATIONS; PEROVSKITE; CSPBBR3;
D O I
10.1016/j.ceramint.2022.02.222
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Recently, all-inorganic cesium lead-halide perovskites have shown their promise for light emission applications, due to the excellent optical performance. Herein, we report that the initially nonphosphorescent undoped lead halide Cs4PbBr6 single crystals (SCs) exhibit an ultralong phosphorescence emission under X-ray excitation at low temperatures. It is shown that the dramatic change has been taken place in radioluminescence spectra and the broad-band emission gradually appeared with the decrease of temperature. Below 210 K, the radioluminescence spectra can be deconvoluted into one narrow peak located at 530 nm and two broad peaks centered at 595 nm and 672 nm respectively. Subsequently, the time-dependent radioluminescence spectra in undoped lead-halide Cs4PbBr6 SCs were investigated. The ultralong phosphorescence emission can persist over 120 min at 70 K. We consider that ultralong phosphorescence originates from defect-related emission. To the best of our knowledge, our finding is the first time that undoped Cs4PbBr6 SCs exhibit the phosphorescence emission, which will offer a paradigm to motivate revolutionary applications on perovskite.
引用
收藏
页码:16730 / 16736
页数:7
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