A Chemically Bonded Monolayer Interface Enables Enhanced Thermal Stability and Efficiency in Pb-Sn Perovskite Solar Cells

Bifunctional 16-MHDA SAMs bearing thiol groups establish robust S–Pb chemical coordination at the Pb–Sn perovskite buried interface, improving fracture energy by 30%, doubling photocarrier lifetime, and enabling 24% PCE single-junction cells with T80 > 680 h under 1-sun illumination at 50 °C.

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Recommended citation: Bati, A. S. R.; Liu, C.; Gilley, I. W.; Musgrave III, C. B.; Maxwell, A.; Steele, J. A.; Yang, Y.; Chen, H.; Wan, H.; Xu, J.; Solano, E.; Zhang, R.; Huang, C.; Rehl, B.; Lempesis, N.; Carnevali, V.; Vezzosi, A.; Zeng, L.; Grater, L.; Li, M.; Rolston, N.; Choi, D.; Slama, V.; Rothlisberger, U.; Wang, L.; Goddard III, W. A.; Kanatzidis, M. G.; Chen, B.^*; Bakr, O. M.^*; Sargent, E. H.^* A Chemically Bonded Monolayer Interface Enables Enhanced Thermal Stability and Efficiency in Pb-Sn Perovskite Solar Cells. Joule 2025, 9 (9), 102047.
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