Method for regulating and controlling stress of perovskite thin film by using chemical cross-linking agent and perovskite solar cell

Abstract

The invention discloses a method for regulating and controlling stress of a perovskite thin film by using a chemical cross-linking agent and a perovskite solar cell. The method comprises the following steps of providing a perovskite solution, coating a substrate with the perovskite solution, and then adding an anti-solvent containing a chemical cross-linking agent, and carrying out annealing treatment to obtain the perovskite thin film. According to the method, the high-quality perovskite film can display multiple functions at the same time, including strain adjustment, moisture repellency, trap density reduction, trap-assisted non-radiative recombination inhibition and grain size increase, so that VOC and PCE are remarkably improved, and PSCs subjected to CSRC treatment also show excellent stability. The CSRC method provides a synergistic effect for the stability and efficiency of the PSCs, has a wide perovskite battery industrial application prospect, and provides a solid foundation for future PSCs research and application. 本发明公开一种利用化学交联剂进行钙钛矿薄膜应力调控的方法与钙钛矿太阳能电池。方法包括步骤：提供钙钛矿溶液；将所述钙钛矿溶液涂覆于基板上，接着加入含有化学交联剂的反溶剂；进行退火处理，得到钙钛矿薄膜。该方法可以使高质量的钙钛矿膜同时显示多种功能，包括应变调节，斥湿，降低陷阱密度，抑制陷阱辅助非辐射复合以及增大晶粒尺寸，从而使VOC和PCE显著提高，经CSRC处理的PSCs还表现出优异的稳定性。CSRC的方法为PSCs的稳定性和效率提供了协同增效的作用，有广阔的钙钛矿电池工业应用前景，并为未来的PSCs研究及应用提供坚实基础。