First-principles study on optic-electronic properties of doped formamidinium lead iodide perovskite

Diao Xin-Feng^{1, 2}, Tang Yan-Lin^{3, †}, Xie Quan¹

Optical absorption spectra of three crystals: FA_0.75Cs_0.25Sn_0.5Pb_0.5I₃, FA_0.75Cs_0.25Sn_0.5Ge_0.5I₃, and FA_0.75Cs_0.25Sn_0.25Ge_0.75I₃.