Doping metal ions into lead halide perovskite nanocrystals (NCs) has attracted great attention over the past few years due to the emergence of novel properties relevant to optoelectronic applications. Here, the synthesis of Mn²⁺/Yb³⁺ codoped CsPbCl₃ NCs through a hot‐injection technique is reported. The resulting NCs show a unique triple‐wavelength emission covering ultraviolet/blue, visible, and near‐infrared regions. By optimizing the dopant concentrations, the total photoluminescence quantum yield (PL QY) of the codoped NCs can reach ≈125.3% due to quantum cutting effects. Mechanism studies reveal the efficient energy transfer processes from host NCs to Mn²⁺ and Yb³⁺ dopant ions, as well as a possible inter‐dopant energy transfer from Mn²⁺ to Yb³⁺ ion centers. Owing to the high PL QYs and minimal reabsorption loss, the codoped perovskite NCs are demonstrated to be used as efficient emitters in luminescent solar concentrators, with greatly enhanced external optical efficiency compared to that of using solely Mn²⁺ doped CsPbCl₃ NCs. This study presents a new model system for enriching doping chemistry studies and future applications of perovskite NCs.

中文翻译：

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用于发光太阳能聚光器的具有三波长发射的Mn2+/Yb3+共掺杂CsPbCl3钙钛矿纳米晶体

由于与光电应用相关的新特性的出现，在过去几年中，将金属离子掺杂到卤化铅钙钛矿纳米晶体（NC）中引起了极大的关注。在此，报道了通过热注射技术合成Mn ²⁺ /Yb ³⁺共掺杂CsPbCl _{3 NCs。}由此产生的 NC 显示出独特的三波长发射，覆盖紫外/蓝色、可见光和近红外区域。通过优化掺杂剂浓度，由于量子切割效应，共掺杂NCs的总光致发光量子产率（PL QY）可以达到约125.3%。机理研究揭示了从主体NC到Mn ²⁺和Yb ³⁺掺杂离子的有效能量转移过程，以及可能的从Mn ²⁺到Yb ³⁺离子中心的掺杂剂间能量转移。^{由于高PL QY和最小的重吸收损失，共掺杂钙钛矿NC被证明可用作发光太阳能聚光器中的高效发射器，与仅使用Mn 2+}掺杂的CsPbCl ₃ NC相比，其外部光学效率大大提高。这项研究提出了一个新的模型系统，用于丰富钙钛矿纳米颗粒的掺杂化学研究和未来应用。