柔性钙钛矿电池的机械稳定性提升策略

Strategy of improving mechanical stability of flexible perovskite solar cells

柔性钙钛矿太阳能电池具有柔性、轻量化、低成本和高功率转换效率的特点,在光伏领域极具发展前景。然而,脆性的电极和多晶钙钛矿薄膜限制了柔性钙钛矿太阳能电池的机械稳定性,电池中各层材料间热膨胀系数不匹配、界面处结合力较弱等因素也显著制约了钙钛矿电池的柔性提升,成为其商业化进程的潜在阻碍。本文回顾了近年来柔性钙钛矿电池在衬底、电极、钙钛矿膜层及界面方面重要的柔性改善工作,综述了柔性钙钛矿电池不同功能层的机械稳定性提升策略,并对高效率、机械稳定的柔性钙钛矿电池的未来发展方向进行了初步展望。

Among flexible photovoltaic technologies,flexible perovskite solar cells have emerged as the most attractive and promising technology because of their flexibility,low weight,low cost,and high power conversion efficiency.However,flexible perovskite solar cells have limited mechanical robustness.This issue is related to the use of rigid electrode and perovskite thin films and the large difference in the coefficient of thermal expansion between different layers.The mechanical stability of flexible perovskite solar cells must be further improved to promote the commercialization of these batteries.This paper reviewed recently published studies focusing on improving the flexibility of substrates,electrode,perovskite thin films,and interfaces.Accordingly,the main effective strategies to improve the mechanical robustness of flexible perovskite solar cells was summarized.Finally,we have briefly outlined potential development directions for highly efficient and flexible perovskite solar cells.