The proposed tandem features a wide bandgap antimony-doped Cs2AgBiBr6 (specifically Cs2AgBi0.75Sb0.25Br6) top cell and a narrow bandgap formamidinium tin iodide (FASnI3) bottom device.

Provisional figures from the Solar Energy Association of Ukraine indicate around 500 MW of solar was deployed across the first three months of the year in Ukraine. The association expects this year's ...