清洁能源运用特别是太阳能的运用被认为是解决人类能源危机和环境危机的重要途径。在所有的太阳能光吸收活性材料中，有机无机杂化钙钛矿材料由于它较低的加工成本和迅速攀升的能量转换效率在最近广受关注，其效率已经突破了22%。但是目前的钙钛矿材料在湿度环境下的稳定性，以及热稳定性和光稳定性都还比较差。这一稳定性问题已经成为了钙钛矿太阳能电池走向实用的最大瓶颈。本项目计划利用椭圆偏振光谱、超快光学、拉曼光谱和光电子能谱等多个研究手段，实时观测钙钛矿光吸收活性材料失效的动态过程，深入研究影响钙钛矿材料稳定性的内在衰减机制，然后从新材料研发、薄膜质量优化、表面钝化、辅助材料添加等多个方向协同开展器件稳定性研究，并最终实现高效稳定的钙钛矿太阳能电池。

Clean energy, especially solar energy, is crucial for solving energy and environmental crises. Among various photovoltaic materials, organic-inorganic hybrid perovskites are particularly promising because of their low fabrication costs and rapidly improving power conversion efficiency (PCE), currently greater than 22%. However, current perovskites have poor moisture resistance and thermal/photo stability. Such stability issues largely limit the practical applications. We propose to address the instability problem of perovskite solar cells through new material design, perovskite film optimization, surface passivation and adding adducts , based on the deep understanding of perovskite degradation mechanism. In the end, a highly efficient and air stable perovskite solar cell will be demonstrated.