Numerous defects may occur during the preparation of perovskite films, and these defects obstruct the charge transfer and accelerate the decomposition of films. Herein, the 1-propionate-4-amino-1,2,4-triazolium tetrafluoroborate (PATMBF₄) is employed as a multifunctional additive for caesium (Cs), methylammonium (MA) and formamidinium (FA) triple-cation-based perovskites (CsFAMA) to prepare inverted planar solar cells. The amino group (-NH₂) in PATM⁺ can donate free electron pair to form a Pb-N coordination bond with perovskite, which can not only regulate crystal growth, but also decrease the generation of charge recombination centers to make charge transfer more effective. The hydrogen bond formed between the carbonyl group (CO) contained in PATM⁺ and FA⁺ (O···H-N) restrains the migration of FA⁺ to the film surface, thus retarding the decomposition of film. Hence, the photoelectric conversion efficiency (PCE) of the champion device is as high as 21.35%. In addition, the PCE can sustain over 85% after exposure to air for 4000 h with a relative humidity of 40 ± 5%, and only drops by 10% in the case of 85 °C more than 1000 h (N₂). It can retain 90% of PCE under the full-spectrum sunlight for 800 h (N₂).

钙钛矿薄膜的制备过程中可能会出现许多缺陷，这些缺陷会阻碍电荷转移并加速薄膜的分解。在此，将1-丙酸酯-4-氨基-1,2,4-三唑四氟硼酸酯（PATMBF ₄）用作铯（Cs），甲基铵（MA）和甲ami （FA）三阳离子钙钛矿的多功能添加剂。 （CsFAMA）准备倒置的平面太阳能电池。PATM ^+中的氨基（-NH ₂）可以提供自由电子对，与钙钛矿形成Pb-N配位键，不仅可以调节晶体的生长，而且可以减少电荷复合中心的产生，从而使电荷转移更加有效。羰基之间形成的氢键（CPATM ⁺和FA ⁺（O···HN ）中包含的O）抑制了FA ⁺向膜表面的迁移，从而阻碍了膜的分解。因此，冠军装置的光电转换效率（PCE）高达21.35％。此外，PCE在暴露于空气中4000个小时（相对湿度40±5％）后可以维持超过85％的温度，而在85°C超过1000 h（N ₂）的情况下，仅能下降10％。在全光谱的阳光下，它可以保留90％的PCE 800 h（N ₂）。