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The surfaces of polycrystalline perovskite films impact the long-term performance of perovskite solar cells, yet their microstructure is not well understood. Research now reveals the

existence of concave grain structures at the surface of the perovskite layer facing the electron transport layer, and their detrimental effect on the stability of the interface and

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(2021). Article  Google Scholar  Download references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics,

School of Physics, Peking University, Beijing, China Qing Zhao Authors * Qing Zhao View author publications You can also search for this author inPubMed Google Scholar CORRESPONDING AUTHOR

Correspondence to Qing Zhao. ETHICS DECLARATIONS COMPETING INTERESTS The author declares no competing interests. RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS

ARTICLE Zhao, Q. Smoothing down interfaces. _Nat Energy_ 9, 920–921 (2024). https://doi.org/10.1038/s41560-024-01610-x Download citation * Published: 02 August 2024 * Issue Date: August 2024

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