Article

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.