<p>➀ Researchers from Peking University have developed a new method to stabilize perovskite solar cells without common trade-offs.</p><p>➁ The method involves an iodine intercalation-declaration strategy, which enhances the efficiency and stability of perovskite solar cells.</p><p>➂ Solar cells using this technique achieved over 24% power conversion efficiency and maintained 99% of their original efficiency after 1,100 hours of operation at 85°C.</p>