A post-treatment additive enables synergistic surface passivation and secondary grain growth regulation for high-performance air-processed perovskite solar cells

-pyrazol-2-yl)acetamide (FPA) was developed to simultaneously leverage the synergistic benefits of surface passivation and secondary grain growth regulation, thereby achieving a high efficiency of 26.01%-among the highest reported for air-processed perovskite solar cells (PSCs) to date.