Structural Distortions Control Scaling of Exciton Binding Energies in Two-Dimensional Ag/Bi Double Perovskites

Pierre Lechifflart, Raisa-Ioana Biega, Linn Leppert

Three-dimensional metal halide double perovskites such as Cs${}_2$AgBiBr${}_6$ exhibit pronounced excitonic effects due to their anisotropic electronic structure and chemical localizat…