 In 2020 and 2021, there has been significant progress made in the field of perovskite solar cells, PSCs. The efficiency of these cells has increased significantly, while their stability and environmental friendliness have also improved. Researchers are working to reduce lead leaks and develop lead-free alternatives, which will help bring this technology closer to commercialization. Additionally, efforts are being made to create tandem devices and develop PSC modules for practical applications. This article was authored by Tianhao Wu, Zhenzhen Qin, Yanbao Wang, and others.