Researchers from China and France have reported a molecular stabilization strategy to mitigate light-induced degradation in metal-halide perovskite solar cells. The joint study incorporates a multifunctional hindered amine into the perovskite layer to limit photo-driven chemical decomposition. During illumination, the stabilizer neutralizes superoxide radicals generated in the perovskite film and passivates electronic defects at interfaces and grain boundaries. Together, these effects reduce non-radiative recombination and improve film quality and long-term stability. Using the technique, inverted perovskite solar cells fabricated in ambient conditions achieved a certified power conversion efficiency of 26.74%. Unencapsulated cells preserved more than 95% of their initial efficiency after over 1,000 hours of continuous illumination. The authors state that the strategy is compatible with existing device architectures and scalable fabrication processes.