Research published in the journal Science (Volume 391, Issue 6780, January 2026) focuses on limiting the reactivity of phosphonic acid between the layer and perovskite. The aim is to stabilize perovskite solar modules. The authors introduce a method that limits the chemical interaction of these components. This modification improves the long-term stability of the modules. The study achieves a significant improvement in performance compared to previous versions. The main finding is the increased resistance of perovskites to degradation. The results confirm the potential for practical applications in the solar energy industry.