Near-infrared emission, energy transfer, and mechanisms of Mn2+ and Cr3+ Co-doped lead-free Cs2AgInCl6 double perovskites

Mn 2+ /Cr 3+ codoped Cs 2 AgInCl 6 double perovskite were synthesized via a facile hydrothermal method, which exhibits two photoluminescence bands with a wide emission switch ranging from orange to NIR and the photoluminescence quantum yield of 49.3%.