Alkali-metal-mediated control of phase segregation for flexible kesterite solar cells and modules with improved efficiency

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Nature Energy, Published online: 20 March 2026; doi:10.1038/s41560-026-02018-5

The incorporation of alkali metals in kesterite solar cells enables high efficiency but is challenging to control. Xu et al. show that combining Na and Li ions yields optimal phase formation, enabling efficient solar cells and modules.

41560_2026_2018_Fig1_HTML.png

Nature Energy, Published online: 20 March 2026; doi:10.1038/s41560-026-02018-5

The incorporation of alkali metals in kesterite solar cells enables high efficiency but is challenging to control. Xu et al. show that combining Na and Li ions yields optimal phase formation, enabling efficient solar cells and modules.

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