Lead halide perovskite nanocrystals (NCs) hold strong promise for a variety of light‐harvesting, emitting, and detecting applications, all of which, however, could be complicated by multicarrier Auger recombination. Therefore, complete documentation of the size‐ and composition‐dependent Auger recombination rates of these NCs is highly desirable, as it can guide system design in many applications. Herein we report the synthesis and Auger measurements of monodisperse APbX₃ (A=Cs and FA; X=Cl, Br, and I) NCs in an extensive size range (ca. 3–9 nm). The biexciton Auger lifetime of all the NCs scales linearly with the NC volume. The scaling coefficient is virtually independent of the cation but rather depends sensitively on the anion, and is 0.035, 0.085, and 0.142 ps nm⁻³ for Cl, Br, and I, respectively. In all of these nanocrystals the Auger recombination is much faster than in standard CdSe and PbSe NCs (ca. 1 ps nm⁻³).

中文翻译：

---

卤化钙钛矿型纳米晶体中与尺寸和卤化物有关的俄歇复合。

卤化钙钛矿铅纳米晶体（NCs）在各种光收集，发射和检测应用中都具有广阔的前景，但是，通过多载子俄歇重组可能会使所有这些复杂化。因此，非常需要这些NC的尺寸和成分相关的俄歇复合率的完整文档，因为它可以指导许多应用中的系统设计。在这里，我们报告了单分散APbX ₃（A = Cs和FA； X = Cl，Br和I）NC的合成和俄歇测量，其尺寸范围很广（约3–9 nm）。所有NC的双激子俄歇寿命与NC体积成线性比例关系。缩放系数实际上与阳离子无关，而是敏感地取决于阴离子，并且为0.035、0.085和0.142 ps nm ^-3。Cl，Br和I分别表示 在所有这些纳米晶体中，俄歇复合速度比标准CdSe和PbSe NCs（约1 ps nm ^-3）快得多。