Project description: Device stability is a constraint on the commercialization of perovskite solar cells and a key issue that must be solved during their commercialization. We have developed an organic grain boundary passivation technology that can effectively improve the environmental stability of perovskite devices. At the same time, due to the passivation effect of organic compounds on defects, the efficiency of the device has also been greatly improved. At the same time, the research team developed inorganic perovskite solar cells and achieved an energy conversion efficiency of 15% through device optimization and theoretical exploration.  Prospects: Our technology effectively improves the environmental stability of the device, optimizes the efficiency of the device, and improves the energy conversion efficiency, laying a good foundation for its commercialization. New energy emerging industries have broad application prospects.