On the Role of Cs4PbBr6 Phase in the Luminescence Performance of Bright CsPbBr3 Nanocrystals

Nanomaterials

Václav Čuba¹  Jan Král¹  Kateřina Děcká¹  Adéla Suchá¹  Ivo Jakubec²  Vladimir Babin³  Eva Mihóková³  Martin Nikl³  Vítězslav Jarý³ 

[1] Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19 Prague, Czech Republic;Institute of Inorganic Chemistry, Czech Academy of Sciences, Husinec-Řež č.p. 1001, 250 68 Řež, Czech Republic;Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00 Prague, Czech Republic;

关键词: nanocrystals;    lead halide perovskites;    luminescence;    scintillation detectors;   

DOI  :  10.3390/nano11081935

来源: DOAJ

【 摘 要 】

CsPbBr₃ nanocrystals have been identified as a highly promising material for various optoelectronic applications. However, they tend to coexist with Cs₄PbBr₆ phase when the reaction conditions are not controlled carefully. It is therefore imperative to understand how the presence of this phase affects the luminescence performance of CsPbBr₃ nanocrystals_. We synthesized a mixed CsPbBr₃-Cs₄PbBr₆ sample, and compared its photo- and radioluminescence properties, including timing characteristics, to the performance of pure CsPbBr₃ nanocrystals. The possibility of energy transfer between the two phases was also explored. We demonstrated that the presence of Cs₄PbBr₆ causes significant drop in radioluminescence intensity of CsPbBr₃ nanocrystals, which can limit possible future applications of Cs₄PbBr₆-CsPbBr₃ mixtures or composites as scintillation detectors.

【 授权许可】

Unknown