All‐Scalable CH₃NH₃PbI₃ Perovskite Solar Cells Fabricated in Ambient Air

Perovskite solar cells (PSCs) are an attractive emerging photovoltaic technology due to their high-performance while being made by low-cost fabrication processes. The most efficient PSCs small area and nonscalable coating method in inert atmosphere, but these sizes conditions commercially irrelevant. Herein, of is reported using only scalable methods, that is, slot-die blade all ambient air. tolerance relaxed enabled the use hydrated nonhalogenated lead source. Resurfacing strategy then introduced suppress charge carrier nonradiative recombination obtained efficiency 19.91% for rigid 17.4% flexible all-scalable fabrication. To best our knowledge, highest efficiencies n–i–p structured MAPbI3-based air date. devices showed excellent oxygen moisture (ISOS-D-1) as well stable maximum power point operation following burn a dry glove box (relative humidity ≈ 20%) without encapsulation.