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Organic-inorganic perovskite based solar cell with the characteristics of rather low raw materials cost,simple and scalable fabrication approach,and unprecedented rapid increase in power conversion efficiency(PCE),have been highlighted as one of the most competitive technologies for next generation thin film photovoltaic(PV).A great deal of effort has been devoted to explore the unique properties of perovskite materials and further improve the device performance.Here,I will summarize recent progress ofperovskite materials and devices,including 1)low temperature vapor assisted or moisture assisted solution process to fabricate organic-inorganic hybrid perovskite films;2)self-induced passivation of the perovskite materials to improve the device properties;3)the optoelectronic role of chlorine in mixed halide perovskite solar cell;4)interface engineering at the TCO/ETL and ETL/Perovskite interface to enhance the carrier transportation and achieve high device performance in the range of 15～20％PCEs.Meanwhile,I will report the electrical and optical properties of perovskite materials/devices characterized by various techniques,such as kevin probe force microscopy,time-resolved photoluminescence.Further development on film formation,device architecture,and interfaces will lead to continuous improved perovskite solar cells and other organic-inorganic hybrid optoelectronics.