Buried‐Interface Engineering Enables Efficient and 1960‐Hour ISOS‐L‐2I Stable Inverted Perovskite Solar Cells

inverted-structure PSCs is reported. The encapsulated PSC retains 95.4% of its initial PCE following 1960 h maximum-power-point tracking under continuous light illumination at 65 °C (i.e., ISOS-L-2I protocol). The demonstration of operating-stable PSCs under accelerated ageing conditions represents a step closer to the commercialization of this emerging technology.