60 cm2 perovskite-silicon tandem solar cells with an efficiency of 28.9% by homogeneous passivation
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Author
Artuk, Kerem
Oranskaia, Aleksandra
Türkay, Deniz
Saenz, Felipe
D Mensi, Mounir
de Bastiani, Michele
Castro-Méndez, Andrés Felipe
Hurni, Julien
Allebé, Christophe
Othman, Mostafa
DOI
10.1038/s41467-025-63673-y
Abstract
Inverted perovskite solar cells face performance limitations due to non-radiative recombination at the perovskite surfaces in devices, including functional layers. Advanced characterization and density functional theory reveal that phosphonic acids passivate perovskite surface defects, while piperazinium chloride mitigates interface recombination by improving energy level alignment, introducing a field effect, and homogenizing the surface. Together, the quasi-Fermi level splitting of the perovskite is homogeneously increased by ca. 100 mV. This enables two-terminal perovskite-on-silicon tandems to achieve a certified open-circuit voltage of 2 V for a 1 cm² device and high performance in excess of 31%. The scalability of the passivation is furthermore demonstrated with homogeneously passivated devices reaching certified efficiencies of 28.9% for an active area of 60 cm².
Publication Reference
Nature Communications, 16 (1), art. no. 8672
Year
2025