Japan's AIST Achieves 12.28% Efficiency Record for Copper Gallium Selenide Solar Cells
Researchers at Japan's National Institute of Advanced Industrial Science & Technology have achieved a new record power conversion efficiency of 12.28% for copper gallium selenide (CuGaSe₂) solar cells.
Theia Market Signal Identification - AI AssistedPublished Mar 15, 2026
Scientists at Japan's National Institute of Advanced Industrial Science & Technology (AIST) have set a new record for copper gallium selenide (CuGaSe₂) solar cells with a power conversion efficiency of 12.28%. CuGaSe₂, a chalcogenide semiconductor in the chalcopyrite family, features a direct bandgap of approximately 1.68 eV, allowing for efficient absorption of visible sunlight and strong performance in solar energy conversion.
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