The optical properties of Cs4PbBr6-CsPbBr3 perovskite composites

被引:45
作者
Gan, Zhixing [1 ,2 ]
Zheng, Fei [1 ]
Mao, Wenxin [3 ]
Zhou, Chunhua [1 ]
Chen, Weijian [1 ]
Bach, Udo [3 ]
Tapping, Patrick [4 ]
Kee, Tak W. [4 ]
Davis, Jeffrey A. [5 ]
Jia, Baohua [1 ]
Wen, Xiaoming [1 ]
机构
[1] Swinburne Univ Technol, Ctr Translat Atomat, Hawthorn, Vic 3122, Australia
[2] Nanjing Normal Univ, Sch Phys & Technol, Ctr Quantum Transport & Thermal Energy Sci, Jiangsu Key Lab Optoelect Technol, Nanjing 210023, Jiangsu, Peoples R China
[3] Monash Univ, Dept Chem Engn, Clayton, Vic, Australia
[4] Univ Adelaide, Dept Chem, Adelaide, SA 5005, Australia
[5] Swinburne Univ Technol, Ctr Quantum & Opt Sci, Hawthorn, Vic 3122, Australia
基金
澳大利亚研究理事会; 中国国家自然科学基金;
关键词
LIGHT-EMITTING-DIODES; HALIDE PEROVSKITES; DEFECT TOLERANCE; SOLAR-CELLS; LARGE-SCALE; NANOCRYSTALS; LUMINESCENCE; TRANSFORMATION; MICRODISKS; CSPBBR3;
D O I
10.1039/c9nr04787e
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Although the optoelectronic applications of metal halide perovskites have been intensively investigated in recent years, the fundamental carrier dynamics of zero-dimensional (0D) Cs4PbBr6 perovskites has been relatively underexplored; in particular, the nature of the green fluorescence is highly debated. Nevertheless, the unique photophysical properties are of immense interest for a variety of potential applications. In this work, the green emission of the CsPbBr3-Cs4PbBr6 perovskite composites is studied using temperature dependent photoluminescence (PL). The PL spectra at different temperatures simultaneously contain two sub-peaks (520 nm and 550 nm), which are ascribed to the emissions of the band-edge and the defect trapped exciton of CsPbBr3. This finding will help to understand the controversial photoluminescence currently observed in different 0D Cs4PbBr6 perovskites.
引用
收藏
页码:14676 / 14683
页数:8
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