界面是影响光电器件性能的关键因素。然而，当前有关有机-无机杂化钙钛矿材料界面结构和电子学性质的信息极为欠缺。本项目将利用扫描隧道显微术和光电子能谱等表面分析技术，系统研究多种方法制备薄膜器件的表面界面结构和电子学性质。在原子尺度上揭示钙钛矿材料表面界面结构、电子学性质与器件性能的内在联系，理解钙钛矿型太阳电池中载流子界面输运的微观机制。在此基础上，探索通过界面调控优化钙钛矿型太阳能电池性能的有效途径。

Interfaces are the crucial factors that affect the performances of optoelectronic devices. However, information about organic-inorganic hybrid perovskite interfaces is so far very scarce. In this project, we will use the surface analysis techniques including scanning tunneling microscopy and photoelectron spectroscopy to investigate the atomic structures and electronic properties of perovskite surfaces and interfaces prepared by different techniques. The aim is to reveal the relationships between interface structures, electronic properties and device performances, and to understand the microscopic mechanism of charge carrier transport at interfaces of perovskite solar cells. Based on the knowledge about interfaces, we will seek the route to improve perovskite solar cell performance by interface engineering.