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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 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 μeV.

preprint2016arXivOpen access
Fengrui HuChunyang YinHuichao ZhangChun SunWilliam W. YuChunfeng ZhangXiaoyong WangYu ZhangMin Xiao
cond-mat.mtrl-sciphysics.optics
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Fengrui HuChunyang YinHuichao ZhangChun SunWilliam W. YuChunfeng ZhangXiaoyong WangYu ZhangMin Xiao

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