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Nature Energy (2026)
The upper stability limit of formamidinium–caesium (FACs) lead iodide perovskite solar cells (PSCs) under thermal and light stress is poorly understood. Now, analysis of the photothermal stability of hundreds of FACs PSCs reveals distinct temperature-dependent degradation modes. On the basis of the mechanistic insight, stabilizing strategies are proposed to mitigate the degradation pathways.
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Yi, C. et al. Entropic stabilization of mixed A-cation ABX3 metal halide perovskites for high performance perovskite solar cells. Energy Environ. Sci. 9, 656–662 (2016). This paper reports that mixed FACs perovskites are entropically stabilized, enabling high efficiency and excellent long-term stability.
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This is a summary of: Wang, M. et al. Decoupling cation segregation and volatile loss in formamidinium–caesium metal halide perovskite solar cells under high-temperature operating conditions. Nat. Energy https://doi.org/10.1038/s41560-026-02011-y (2026).
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Degradation pathways of FAxCs1−xPbI3 perovskite solar cells. Nat Energy (2026). https://doi.org/10.1038/s41560-026-02012-x
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DOI: https://doi.org/10.1038/s41560-026-02012-x
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Nature Energy (Nat Energy)
ISSN 2058-7546 (online)
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