The practical applications of organic-inorganic hybrid metal halide-based perovskite solar cells (PSCs), as the fastest growing photovoltaic devices, are limited by the further improvement of their stability and performance. Additive engineering is considered as a hopeful strategy to alleviate these issues. Herein, Lansoprazole (Lanz), as a multifunctional additive, has four effects for ameliorating the stability and performance of PSCs. The strong hydrophobic trifluoromethyl group on Lanz can cover atop of perovskite to build a moisture-oxygen-barrier; The high electron-donating sulfinyl moiety on Lanz can provide lone electron pair to lead ions to passivate defects; The modification of Lanz can adjust Fermi-level of perovskite and optimize the energy match of functional layers; The introduction of Lanz can moderate the growth rate of perovskite, improve crystal quality and reduce grain boundaries and defects. Consequently, the Lanz-modified device achieves an excellent PCE of 24.05% compared to the pristine device (PCE of 21.91%). Meanwhile the modified device possesses excellent environmental and operational stability that maintains 84% of its initial PCE under continuous irradiation for 500 h.

有机-无机杂化金属卤化物基钙钛矿太阳能电池（PSC）作为发展最快的光伏器件，其实际应用受限于其稳定性和性能的进一步提高。增材工程被认为是缓解这些问题的一种有希望的策略。在此，兰索拉唑 (Lanz) 作为一种多功能添加剂，对改善 PSC 的稳定性和性能具有四种作用。Lanz 上的强疏水性三氟甲基基团可以覆盖钙钛矿的顶部，形成水-氧-阻隔层；Lanz上的高给电子亚磺酰基部分可以为铅离子提供孤电子对以钝化缺陷；Lanz的改性可以调整钙钛矿的费米能级，优化功能层的能量匹配；Lanz的引入可以减缓钙钛矿的生长速度，提高晶体质量，减少晶界和缺陷。因此，与原始设备（21.91% 的 PCE）相比，Lanz 改进的设备实现了 24.05% 的出色 PCE。同时，改进后的装置具有优异的环境和运行稳定性，在连续辐照 500 小时下保持其初始 PCE 的 84%。