发表机构
Purdue University（普渡大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究表征了从孤立到含十个点的CsPbI3钙钛矿量子点团簇，发现多发射体团簇呈现双指数衰变且寿命随发射体数变化，确立了研究集体光学行为的平台。
AI 中文摘要
胶体钙钛矿量子点兼具明亮发射与自组装成紧密排列结构的能力，使得从孤立发射体到少点团簇的辐射动力学得以研究。在此，我们表征了从孤立发射体到包含多达十个点的自组装团簇的CsPbI3钙钛矿量子点。我们利用光子自相关、闪烁统计和发射亮度的组合来估计每个团簇中的发射体数量。与孤立点相比，包含两个或更多发射体的团簇表现出双指数衰变，其短寿命随发射体数量增加而减小，并伴随一个额外的长寿命组分。光子关联傅里叶光谱显示，单点发射远未达到寿命受限区域。然而，即使在这种低相干区域，我们也观察到依赖于发射体数量的衰变动力学。这些测量共同确立了自组装钙钛矿量子点团簇作为一个平台，用于研究集体光学行为如何在单发射体与系综极限之间涌现。
英文摘要
Colloidal perovskite quantum dots combine bright emission with the ability to self- assemble into closely spaced structures, enabling radiative dynamics to be studied from isolated emitters to few-dot clusters. Here, we characterize CsPbI3 perovskite quan- tum dots from isolated emitters to self-assembled clusters containing up to ten dots. We estimate the number of emitters in each cluster using a combination of photon autocorrelation, blinking statistics, and emission brightness. Compared with isolated dots, clusters containing two or more emitters exhibit biexponential decay, with a short lifetime that decreases with emitter number and an additional long-lived component. Photon-correlation Fourier spectroscopy shows that the single-dot emission remains far from the lifetime-limited regime. Nevertheless, we observe emitter-number-dependent decay dynamics even in this low-coherence regime. Together, these measurements es- tablish self-assembled perovskite quantum-dot clusters as a platform for studying how collective optical behavior emerges between the single-emitter and ensemble limits
Comments26 pages (9 page main, 13 page supplemental, 4 page references), 4 main figures, 5 supplemental figures
