All-inorganic CsPbX₃ perovskite solar cells (PSCs) have become a research topic in the field of photovoltaics in recent years due to their suitable bandgap and excellent stability. The power conversion efficiency (PCE) has increased from 2.9% to more than 21% at present, which possesses great commercialization potential and broad practical application prospects. The crystal growth and defect level of perovskite film have a significant impact on the performance and stability of the devices, therefore, optimization for the film crystallization process and the suppression of the trap states are essential for the preparation of high-performance photovoltaic devices. In this review, firstly, basic information about CsPbX₃ perovskite is presented, including the crystal structure, phase characteristics, different types of defects in the film, and the detrimental effects on device performance. Secondly, the crystallization modulation and defect passivation strategies applied to prepare high-quality perovskite film are systematically summarized, and the optimization schemes to improve device performance and stability are outlined in terms of four aspects, including composition engineering, organic additive engineering, dimension engineering, and interface engineering. Finally, the challenges faced in the current research process of all-inorganic CsPbX₃ are elaborated, and the prospects for further research are envisioned.

全无机CsPbX ₃钙钛矿太阳能电池（PSC）凭借其合适的带隙和优异的稳定性成为近年来光伏领域的研究课题。目前功率转换效率（PCE）已从2.9%提高到21%以上，具有巨大的商业化潜力和广阔的实际应用前景。钙钛矿薄膜的晶体生长和缺陷水平对器件的性能和稳定性具有显着影响，因此，薄膜结晶过程的优化和陷阱态的抑制对于制备高性能光伏器件至关重要。在这篇综述中，首先介绍了CsPbX ₃钙钛矿的基本信息，包括晶体结构、相特征、薄膜中不同类型的缺陷以及对器件性能的不利影响。其次，系统总结了用于制备高质量钙钛矿薄膜的晶化调控和缺陷钝化策略，并从成分工程、有机添加剂工程、尺寸工程、和界面工程。最后，阐述了目前全无机CsPbX ₃研究过程中面临的挑战，并对进一步研究的前景进行了展望。