Fig. 6

Calculated refractive index of (a) Si-based, (b) Ge-based, and (c) Sn-based chalcogenide perovskites using the HSE06 method.

Calculated refractive index of (a) Si-based, (b) Ge-based, and (c) Sn-based chalcogenide perovskites using the HSE06 method.