Recently, all-inorganic halide perovskites have received enormous attention because of their excellent optoelectronic properties. Among them, the power conversion efficiency (PCE) of all-inorganic halide perovskite solar cells has made rapid progress in the last few years. However, understanding the intrinsic physical nature of halide perovskites, especially the dynamic process of photo-generated carriers, is a key for improving the PCE. In this review, we introduced and summarized the photoluminescence (PL) technique used to explore the carrier dynamic process in all-inorganic halide perovskites. Several physical models were proposed to investigate the dynamic parameters, i.e., recombination lifetime and diffusion length, by analyzing the steady-state PL as well as the time-resolved PL spectra. We also discussed the distinction of PL spectral behavior between bulk halide perovskite samples and those grown with transport layers due to the participation of different dominant dynamic paths. Finally, we briefly described some other optical techniques reported to study the relevant physical properties of all-inorganic halide perovskites.

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发光光谱研究全无机卤化物钙钛矿中的载流子动力学过程

近来，全无机卤化物钙钛矿因其优异的光电性能而受到广泛关注。其中，近几年来，全无机卤化物钙钛矿太阳能电池的功率转换效率（PCE）取得了飞速的进步。但是，了解卤化钙钛矿的内在物理性​​质，尤其是光生载流子的动态过程，是改善PCE的关键。在这篇综述中，我们介绍并总结了用于探索全无机卤化物钙钛矿中载流子动力学过程的光致发光（PL）技术。通过分析稳态PL和时间分辨的PL光谱，提出了几种物理模型来研究动力学参数，即复合寿命和扩散长度。我们还讨论了由于不同的主要动态路径的参与，在散装卤化物钙钛矿样品和带有传输层的样品之间的PL光谱行为的区别。最后，我们简要介绍了报道的其他一些光学技术，用于研究全无机卤化物钙钛矿的相关物理性质。