On the role of Cs.sub.4./sub.PbBr.sub.6./sub. phase in the luminescence performance of bright CsPbBr.sub.3./sub. nanocrystals

0545258 - FZÚ 2022 RIV CH eng J - Journal Article
Děcká, Kateřina - Suchá, A. - Král, J. - Jakubec, Ivo - Nikl, Martin - Jarý, Vítězslav - Babin, Vladimir - Mihóková, Eva - Čuba, V.
On the role of Cs₄PbBr₆ phase in the luminescence performance of bright CsPbBr₃ nanocrystals.
Nanomaterials. Roč. 11, č. 8 (2021), č. článku 1935. E-ISSN 2079-4991
R&D Projects: GA ČR(CZ) GA20-06374S
Institutional support: RVO:68378271 ; RVO:61388980
Keywords : nanocrystals * lead halide perovskites * luminescence * scintillation detectors
OECD category: Condensed matter physics (including formerly solid state physics, supercond.); Inorganic and nuclear chemistry (UACH-T)
Impact factor: 5.719, year: 2021
Method of publishing: Open access

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.
Permanent Link: http://hdl.handle.net/11104/0322001