Development of high band-gap thin films related to CZTSSe, for use as top absorber material in thin film tandem solar cells. KU Leuven
Today, record single-junction solar cell efficiencies are approaching their theoretical limit of 30 % under 1-sun illumination. One method to increase efficiency even further is the development of tandem cells. A tandem solar cell consists of two cells: a high band-gap cell (>1.5 eV) harvests the high-energy photons and a lower band-gap cell (<1.5 eV) harvests the low-energy photons. This approach leads to theoretical efficiencies of 44 ...