Advances in Air‐Stable Perovskite Precursor Inks for Photovoltaics

Perovskite photovoltaic has garnered widespread attentions from the scientific and industrial community for the exceptional power conversion efficiency, low fabrication cost, straightforward processing, and structural versatility of the devices. However, conventional fabrication process of perovskite light‐absorbing films requires strictly controlled low‐humidity and low‐oxygen inert environment, which poses significant challenges for large‐area production and commercial scalability. Developing air‐stable perovskite precursor inks provides a useful approach to overcome the constraints of traditional preparation conditions. The present review first highlights the properties of perovskite precursor colloids and then provides a systematic overview of recent advances in air‐stable perovskite inks. A broad spectrum of strategies for bolstering the ambient stability of perovskite inks is comprehensively examined—encompassing solvent engineering, compositional optimization, and additive design. The review concludes by pinpointing the remaining challenges and charting future research pathways toward truly air‐processable perovskite materials, with the goal of accelerating both the technological maturation and the industrial‐scale deployment of perovskite photovoltaics.