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Degradation pathways of FAxCs1−xPbI3 perovskite solar cells

Nature Energy (2026)Cite this article

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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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Fig. 1: Distinct degradation mechanisms in BCP-based and SnO2-based devices.

References

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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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