Chinese researchers scale flexible perovskite solar cells past 20% efficiency

The significance here lies less in the efficiency figure than in the word "stable" at commercial scale: flexible perovskite's problem has been that lab-scale gains evaporate when devices get larger, so a strategy that holds performance at commercial specifications is the real threshold. This matters for the thin-film and building-integrated PV supply chain, where flexibility and weight are the differentiators rather than raw efficiency. Whether the decoupled co-deposition approach survives independent replication and translates into manufacturing yields remains the open question.