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15 February 2025
 
  » arxiv » 1605.0200

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Slow Auger Recombination of Charged Excitons in Nonblinking Perovskite Nanocrystals without Spectral Diffusion
Fengrui Hu ; Chunyang Yin ; Huichao Zhang ; Chun Sun ; William W. Yu ; Chunfeng Zhang ; Xiaoyong Wang ; Yu Zhang ; Min Xiao ;
Date 1 May 2016
AbstractOver 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 several specific heterostructures. Here we show that nonblinking PL is readily available in the newly-synthesized perovskite CsPbI3 (cesium lead iodide) NCs, and 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 linewidth of ~200 {mu}eV.
Source arXiv, 1605.0200
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