Memories in the photoluminescence intermittency of single cesium lead bromide nanocrystals.

Author(s) Hou, L.; Zhao, C.; Yuan, X.; Zhao, J.; Krieg, F.; Tamarat, P.; Kovalenko, M.V.; Guo, C.; Lounis, B.
Journal Nanoscale
Date Published 2020 Mar 28

Single cesium lead bromide (CsPbBr) nanocrystals show strong photoluminescence intermittency, with on- and off- dwelling times following power-law distributions. We investigate the correlations for successive on-times and successive off-times, and find a memory effect in the photoluminescence intermittency of such inorganic perovskite nanocrystals. This memory effect is not sensitive to the nature of the surface capping ligand and the embedding polymer. These observations suggest that photoluminescence intermittency and its memory are mainly controlled by intrinsic traps in the nanocrystals. Our findings will help optimizing light-emitting devices based on these perovskite nanocrystals.

DOI 10.1039/d0nr00633e
ISSN 2040-3372
Citation Nanoscale. 2020;12(12):67956802.

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