Extended Data Fig. 3: Electronic and optical properties of Cs2NaInCl6.
From: Efficient and stable emission of warm-white light from lead-free halide double perovskites
a, GW-calculated band structure. The GW bandgap is 6.42 eV. The lowest exciton, with a binding energy of 0.8 eV, is dark. The first bright exciton has a binding energy of 0.44 eV. b. Calculated optical absorption (‘Abs-theory’) and photoluminescence (‘PL-theory’) spectra are compared with experimental results (‘Abs-exp.’ and ‘PL-exp.’).
