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

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

(a) Band structure and (b) optical absorption spectrum of FA_0.83Cs_0.17Pb(I_0.5Br_0.53. The band gap is 1.987 eV.