Either cationic ammonium or anionic pseudohalide compounds can passivate partial defects in perovskite solar cells (PSCs); however, their ion-pairing combination has rarely been studied because of its rarity. We present an ion-pairing passivating agent, diethylammonium diethyldithiocarbamate, synchronously providing both cationic and anionic ions, which can convert the surfaces of lead halide perovskite into two types of water-resistant compositions by forming strong chemical bonds. These synergistic capping compositions also reduce the defect density in the surface and bulk domains by passivating defect-nucleating sites, which can modify the surface energy level toward boosted photovoltage to 1.122 V and efficiency to 23.21% for pure-phase FAPbI₃ PSCs. In addition, their water-resistant features can effectively prevent moisture damage into the perovskite layer and significantly elongate device stabilities.

阳离子铵或阴离子拟卤化物化合物都可以钝化钙钛矿太阳能电池（PSC）中的部分缺陷；然而，由于其稀有性，它们的离子对组合很少被研究。我们提出了一种离子对钝化剂二乙基二硫代氨基甲酸二乙铵，它同时提供阳离子和阴离子，它可以通过形成强化学键将卤化铅钙钛矿的表面转化为两种类型的防水组合物。这些协同封端组合物还通过钝化缺陷成核位点来降低表面和体域中的缺陷密度，这可以将表面能级改变为将光电压提高到 1.122 V，将纯相 FAPbI _{3的效率提高到 23.21%}PSC。此外，它们的防水特性可以有效地防止水分对钙钛矿层的破坏，并显着延长器件的稳定性。