The luminescence and charge transport properties of inorganic CsPbX3 perovskite nanocrystals (NCs) make them attractive candidates for various optoelectronic applications, such as lasing, X-ray imaging, light communication, and light-emitting diodes (LEDs). However, to realize cutting-edge device performance, high-quality NCs with high photoluminescence quantum yields (PLQYs) are essential. Therefore, substantial efforts and progress have been made to attain superior design/engineering and optimization of the inorganic NCs with a focus on surface quality, reduced nonradiative charge carrier recombination centers, and improved colloidal stabilities. Metal-ion doping has been proven to have a robust influence on the electronic band structure, PL behavior, and charge carrier recombination dynamics. Thus, in this perspective, we summarize the recent progress of the significant impact of metal cation doping on the optical properties, including the PL enhancement of CsPbCl3, CsPbBr3, and CsPbI3 perovskite NCs. Moreover, we shed light on the mechanism behind such improved properties. We conclude by recommending possible aspects and strategies to be further explored and considered for better utilization of these doped NCs in thin-film optoelectronic and energy conversion devices.

中文翻译：

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金属离子掺杂在无机钙钛矿纳米晶体中的近统一光致发光量子产率。

无机CsPbX3钙钛矿纳米晶体（NC）的发光和电荷传输特性使其成为各种光电应用（例如激光，X射线成像，光通信和发光二极管（LED））的有吸引力的候选者。但是，要实现尖端的设备性能，具有高光致发光量子产率（PLQY）的高质量NC是必不可少的。因此，已经做出了巨大的努力和进步，以实现无机NC的出色设计/工程设计和优化，重点是表面质量，减少了非辐射载流子的复合中心以及改善了胶体稳定性。事实证明，金属离子掺杂对电子能带结构，PL行为和电荷载流子复合动力学具有强大的影响。因此，从这个角度来看，我们总结了金属阳离子掺杂对光学性能的重大影响的最新进展，包括对CsPbCl3，CsPbBr3和CsPbI3钙钛矿NC的PL增强。此外，我们阐明了这种改进的特性背后的机理。最后，我们建议了可能要进一步探索和考虑的方面和策略，以便在薄膜光电和能量转换设备中更好地利用这些掺杂的NC。