Diamine Chelates for Increased Stability in Mixed Sn–Pb and All-Perovskite Tandem Solar Cells

Diamines selectively chelate surface Sn atoms in mixed Sn–Pb perovskite films to correct a Sn-rich compositional gradient, forming a low-dimensional passivating barrier that enables 28.8% PCE tandem solar cells retaining 90% efficiency after 1000 h of MPP operation under 1-sun illumination.

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Recommended citation: Li, C.; Chen, L.; Jiang, F.; Song, Z.; Wang, X.; Balvanz, A.; Ugur, E.; Liu, Y.; Liu, C.; Maxwell, A.; Chen, H.; Liu, Y.; Wang, Z.; Xia, P.; Li, Y.; Fu, S.; Sun, N.; Grice, C. R.; Wu, X.; Fink, Z.; Hu, Q.; Zeng, L.; Jung, E.; Wang, J.; Park, S. M.; Luo, D.; Chen, C.; Shen, J.; Han, Y.; Perini, C. A. R.; Correa-Baena, J.-P.; Lu, Z.-H.; Russell, T. P.; De Wolf, S.; Kanatzidis, M. G.; Ginger, D. S.; Chen, B.^*; Yan, Y.^*; Sargent, E. H.^* Diamine Chelates for Increased Stability in Mixed Sn–Pb and All-Perovskite Tandem Solar Cells. Nature Energy 2024, 9 (11), 1388–1396.
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