Perovskite solar cells: Fundamental aspects, stability challenges,
CdTe solar cells have been identified as the best candidate for PV technology. CdTe solar cells can absorb a huge amount of sunlight due to their high absorption coefficient and direct band gap of 1.45 eV . CZTS is a quaternary compound with a band gap of 1.4–1.5 eV and an absorption coefficient of 1.0 x10 4 cm −1 .