Regulating Surface Potential Maximizes Voltage in All-Perovskite Tandems

Diammonium surface treatments achieve uniform spatial distribution of surface potential in 1.79 eV perovskite subcells, increasing quasi-Fermi-level splitting by 90 meV and enabling a certified 27% all-perovskite tandem with a record V_OC of 2.19 V and >86% PCE retention after 500 h.

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Recommended citation: Chen, H.^†; Maxwell, A.^†; Li, C.^†; Teale, S.^†; Chen, B.^†; Zhu, T.; Ugur, E.; Harrison, G.; Grater, L.; Wang, J.; Wang, Z.; Zeng, L.; Park, S. M.; Chen, L.; Serles, P.; Awni, R. A.; Subedi, B.; Zheng, X.; Xiao, C.; Podraza, N. J.; Filleter, T.; Liu, C.; Yang, Y.; Luther, J. M.; De Wolf, S.; Kanatzidis, M. G.; Yan, Y.; Sargent, E. H. Regulating Surface Potential Maximizes Voltage in All-Perovskite Tandems. Nature 2023, 613 (7945), 676–681.
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