The poor air-stability and reproducibility of perovskite solar cells (PSCs) have prevented the practical applications of the devices that can withstand sustained operation under ambient air conditions. Here, we report all-ambient-air-solution-processed PSCs based on CH₃NH₃PbI_3−xCl_x-NiO composite film with inserting Al₂O₃/NiO at the TiO₂/perovskite interface in a cell configuration of FTO/c-TiO₂/mp-TiO₂/Al₂O₃/NiO/MAPbI_3−xCl_x-NiO/spiroOMeTAD/Au. The interface engineering with Al₂O₃/NiO not only improves crystalline quality of perovskite films and enhances charge transport, but also effectively suppresses carrier recombination. This composite-based interface engineering PSCs showed a high power conversion efficiency (PCE) of 18.14% and excellent reproducibility with average 16–18% PCE for 35 devices. More importantly, the devices without encapsulation showed a significant enhancement in long-term air-stability; the device photovoltaic parameters stabilized after 20 days and sustained its stability over 210 days with retaining ~100% of its original V_oc, ~94% of J_sc, ~91% of FF and ~86% of PCE in an ambient environment.

钙钛矿太阳能电池（PSC）的空气稳定性和可复制性差，妨碍了该设备在实际环境中能够承受持续运行的实际应用。在此，我们报道了基于CH ₃ NH ₃ PbI _3−x Cl _x -NiO复合膜的全环境空气处理的PSC，其中Al ₂ O ₃ / NiO在TiO ₂ /钙钛矿界面处以FTO / c-TiO ₂ / mp-TiO ₂ / Al ₂ O ₃ / NiO / MAPbI _3-x Cl _x -NiO / spiroOMeTAD / Au。Al ₂ O的界面工程₃ / NiO不仅可以改善钙钛矿薄膜的晶体质量并增强电荷传输，还可以有效抑制载流子复合。这种基于复合材料的接口工程PSC显示出35.14％的高功率转换效率（PCE）和出色的可重复性，平均PCE为16-18％。更重要的是，没有封装的设备在长期空气稳定性方面表现出显着的提高。器件的光伏参数在20天后稳定下来，并在210天的时间内保持了稳定，在周围环境中保留了约100％的原始V _oc，约94％的J _sc，约91％的FF和约86％的PCE。