“A new breakthrough has been made in the field of perovskite solar cells. Experts have proposed a collaborative passivation strategy based on two-dimensional/three-dimensional heterostructures, which successfully suppresses grain boundary defects and free radical induced degradation, significantly improves the quality of thin film crystallization and surface flatness, and achieves a photoelectric conversion efficiency of 21.15%. After 20 days in a humid and hot environment, the initial efficiency of 71.5% is still maintained, providing new ideas and material strategies for the development of perovskite photovoltaic devices that balance high efficiency and high stability.”