基于反溶剂法调控薄膜成核的钙钛矿太阳能电池

Perovskite Solar Cells Based on Anti⁃solvent Method for Modulating Thin Film Nucleation

介绍了一种以分散纳米二氧化硅的氯苯作为反溶剂制备高质量钙钛矿薄膜的新方法。通过在反溶剂氯苯中分散纳米二氧化硅来控制成核和晶体生长,最终提升钙钛矿太阳能电池的整体器件性能。优化后的钙钛矿薄膜致密、表面均匀平整,载流子寿命显著延长至2386.5 ns,器件内建电场提升至1143.2 mV,最佳器件的光电转换效率为20.6%,填充因子提升至76.6%。

A new method for preparing high-quality perovskite films using dispersed nano-silica in chlorobenzene as the anti-solvent was introduced in this article.By dispersing nano-silica in the antisolvent chlorobenzene,nucleation and crystal growth were controlled,ultimately enhancing the overall device performance of perovskite solar cells.The optimized perovskite films had uniform and flat surfaces with high densities,as well as the significantly extended carrier lifetime of 2386.5 ns.The device had an increased built-in electric field of 1143.2 mV,an optimum device photoelectric conversion efficiency of 20.6%,and an increased fill factor of 76.6%.