Slow Auger Recombination of Charged Excitons in Nonblinking Perovskite Nanocrystals without Spectral Diffusion

Over the last two decades, intensive research efforts have been devoted to the suppressions of photoluminescence (PL) blinking and Auger recombination in metal-chalcogenide nanocrystals (NCs), with significant progresses being made only very recently in few specific NC structures. Here we show that...

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Bibliographic Details
Published in:Nano letters 2016-10, Vol.16 (10), p.6425-6430
Main Authors: Hu, Fengrui, Yin, Chunyang, Zhang, Huichao, Sun, Chun, Yu, William W, Zhang, Chunfeng, Wang, Xiaoyong, Zhang, Yu, Xiao, Min
Format: Article
Language:English
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Summary:Over the last two decades, intensive research efforts have been devoted to the suppressions of photoluminescence (PL) blinking and Auger recombination in metal-chalcogenide nanocrystals (NCs), with significant progresses being made only very recently in few specific NC structures. Here we show that nonblinking PL is readily available in the newly synthesized perovskite CsPbI3 NCs and that their Auger recombination of charged excitons is greatly slowed down, as signified by a PL lifetime about twice shorter than that of neutral excitons. Moreover, spectral diffusion is completely absent in single CsPbI3 NCs at the cryogenic temperature, leading to a resolution-limited PL line width of ∼200 μeV.
ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.6b02874