biostudies-literatureLi ZNational Natural Science Foundation of China (National Science Foundation of China)1771https://www.ebi.ac.uk/biostudies/studies/S-EPMC11840045biostudies-literatureUnknown16(1)Flexible perovskite solar cells (FPSCs) with high stability in moist air are required for their practical applications. However, the poor mechanical stability under high humidity air remains a critical challenge for flexible perovskite devices. Herein, inspired by the exceptional wet adhesion of mussels via dopamine groups, we propose a multidentate-cross-linking strategy, which combine multibranched structure and adequate dopamine anchor sites in three-dimensional hyperbranched polymer to directly chelate perovskite materials in multiple directions, therefore construct a vertical scaffold across the bulk of perovskite films from the bottom to the top interfaces, intimately bind to the perovskite grains and substrates with a strong adhesion ability, and enhance mechanical durability under Nature communicationsBoosting mechanical durability under high humidity by bioinspired multisite polymer for high-efficiency flexible perovskite solar cells.PMC1184004552172238, 52102304, 52302327Liu XLi ZLi CJia CCao JWan ZShi JXue JZhang CXiao CLi MWu HfalseBoosting mechanical durability under high humidity by bioinspired multisite polymer for high-efficiency flexible perovskite solar cells.Flexible perovskite solar cells (FPSCs) with high stability in moist air are required for their practical applications. However, the poor mechanical stability under high humidity air remains a critical challenge for flexible perovskite devices. Herein, inspired by the exceptional wet adhesion of mussels via dopamine groups, we propose a multidentate-cross-linking strategy, which combine multibranched structure and adequate dopamine anchor sites in three-dimensional hyperbranched polymer to directly chelate perovskite materials in multiple directions, therefore construct a vertical scaffold across the bulk of perovskite films from the bottom to the top interfaces, intimately bind to the perovskite grains and substrates with a strong adhesion ability, and enhance mechanical durability under 2025-01-01T00:00:00Z2025 Feb2025-04-04T02:05:13.084Z2025-04-04T02:05:13.084ZS-EPMC118400453997200810.1038/s41467-025-57102-3