Lead halide perovskite quantum dots (QDs) are promising materials for next‐generation photoelectric devices because of their low preparation costs and excellent optoelectronic properties. In this study, the blinking mechanisms and the intrinsic quantum‐confined Stark effect (IQCSE) in single organic–inorganic hybrid CH₃NH₃PbBr₃ perovskite QDs using single‐dot photoluminescence (PL) spectroscopy is investigated. The PL quantum yield‐recombination rates distribution map allows the identification of different PL blinking mechanisms and their respective contributions to the PL emission behavior. A strong correlation between the excitation power and the blinking mechanisms is reported. Most single QDs exhibit band‐edge carrier blinking under a low excitation photon fluence. While under a high excitation photon fluence, different proportions of Auger‐blinking emerge in their PL intensity trajectories. In particular, significant IQCSEs in the QDs that exhibit more pronounced Auger‐blinking are observed. Based on these findings, an Auger‐induced IQCSE model to explain the observed IQCSE phenomena is observed.

中文翻译：

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单甲基铵溴化铅钙钛矿量子点的闪烁机理和内在量子限制的斯塔克效应

卤化钙钛矿铅量子点（QDs）是下一代光电器件的有前途的材料，因为它们的制备成本低且光电性能优异。在这项研究中，单个有机-无机杂化CH ₃ NH ₃ PbBr ₃的闪烁机制和内在量子限制斯塔克效应（IQCSE）研究了使用单点光致发光（PL）光谱的钙钛矿量子点。PL量子产率-复合率分布图可以识别不同的PL闪烁机制及其对PL发射行为的贡献。据报道，激发功率和闪烁机制之间具有很强的相关性。大多数单个QD在低激发光子通量下表现出带边载波闪烁。在高激发光子注量下，PL强度轨迹中会出现不同比例的俄歇闪烁。特别是，在QD中观察到显着的IQCSE表现出更明显的俄歇闪烁。基于这些发现，可以观察到俄歇诱导的IQCSE模型来解释观察到的IQCSE现象。