<p>➀ Researchers from the Chinese Academy of Sciences have enhanced the efficiency and durability of flexible tandem solar cells by improving the bonding between layers.</p><p>➁ The perovskite top layer and CIGS bottom layer combination in these cells offers promise for lightweight, high-efficiency solar technology.</p><p>➂ After improvements, the flexible monolithic perovskite/CIGS tandem solar cell achieved a stabilized efficiency of 24.6%, showing strong mechanical durability and long-term stability.</p>