Structure stability and optical properties of Tin-based iodide Perovskite
Abstract In this study, we investigated the optical properties, band gap, dielectric function, and absorption coefficient of Sn-based perovskites, which are considered as potential candidates for Pb-free perovskite solar cells. In addition, the quantum efficiency of the perovskite solar cell was investigated, and the values were compared with the experimental values. Furthermore, as an element that suppresses Sn vacancy formation, we focused on the B site of MASnI3 and investigated the vacancy formation energy by substituting various elements. The absorption coefficient was calculated to investigate the effects of additive element, which suppresses Sn vacancies, on the optical characteristics.