钙钛矿太阳电池的研究取得了重大进展，仅仅用了4年时间就赶上其它类型太阳电池数十年的发展里程。为此，本项目研究具有强的自发极化内电场、窄的禁带宽度1.39eV、高的转换效率33%和性能稳定、环境友好的固溶体铌酸钾-镍铌酸钡(KBNNO)薄膜钙钛矿太阳电池。集中和系统研究高质量KBNNO薄膜的制备，特别是单晶薄膜的制备规律和实现在原子层尺度上可控的、可重复的KBNNO薄膜的激光分子束外延制备关键技术的突破，以及探索研究低成本溶胶-凝胶法KBNNO薄膜制备技术；研究极化材料的电畴结构、取向等与光电压、光电流的关系，及其开路电压不受光吸收带隙限制的新效应等基础科学问题；研制KBNNO薄膜原型单元钙钛矿太阳电池。为钙钛矿太阳电池应用提供基础。

Significant process was made in the research of perovskite solar cells, in just four years to catch up with other types of solar cells for decades milestones. Hence, in this project the KBNNO perovskite thin film solar cells would be researched due to it has strong electric field of spontaneous polarization, narrow band gap (i.e. 1.39 eV), the excellence of high transition efficiency (33%), stable operation quality and environmentally friendly. The fabrication of high quality KBNNO thin film will be systematic studied especially in the research of preparation of single crystal thin film and the breakthroughs in key technologies for the preparation of atomic length scales KBNNO thin films used laser molecular beam epitaxial process. Similarly, the low-cost sol-gel process for the preparation of KBNNO thin films will be explored. Some basic science issues also will be studied like the relationship of the structure of electric domain, orientation of electric domain, photoelectric and electric current; new effect of open circuit voltage without optical absorption band gap limiting. The KBNNO thin film solar cells will be developed and to lay the foundation for perovskite solar cell applications.