Perovskite solar cells (PSCs) are promising low-cost photovoltaic technologies with high solar-to-electric power conversion efficiency (PCE). Preparation of high-quality perovskite thin films is key to achieve high performance for PSCs. In this work, a small amount of fullerene (C₆₀) is added to toluene in the antisolvent dripping process. The resulting C₆₀-containing perovskite solar cells show better stability, PCE, and reproducibility than the device fabricated by using only toluene as an antisolvent. C₆₀ adheres to the pinhole and grain boundaries of perovskite film, improves perovskite crystallinity, and enhances absorption without changing the thickness of the film. It also plays a passivation role on the surface of perovskite film and prevents the migration of I and Pb elements. The change of the morphology and the passivation of the interface increase the FF and J_SC of C₆₀-containing device. The best PCE of 19.8% is obtained. The PCE of encapsulated PSCs still maintains 70% of its initial value after 1000 h continuous full sun illumination.

钙钛矿太阳能电池（PSC）是具有高太阳能到电功率转换效率（PCE）的有前途的低成本光伏技术。高质量钙钛矿薄膜的制备是实现PSC高性能的关键。在这项工作中，在反溶剂滴加过程中，将少量的富勒烯（C ₆₀）添加到甲苯中。与仅使用甲苯作为抗溶剂制造的器件相比，所得的含C ₆₀的钙钛矿太阳能电池表现出更好的稳定性，PCE和可重复性。C ₆₀附着在钙钛矿薄膜的针孔和晶界上，改善了钙钛矿的结晶度，并在不改变薄膜厚度的情况下提高了吸收率。它还在钙钛矿薄膜表面上起钝化作用，并防止I和Pb元素迁移。形态的改变和界面的钝化增加了含C ₆₀的器件的FF和J _SC。获得了19.8％的最佳PCE。连续充满阳光照射1000小时后，封装的PSC的PCE仍保持其初始值的70％。