Sb3+/Mn2+ co-doped lead-free Cs2KYCl6 perovskites for white light-emitting diodes

In Sb 3+ /Mn 2+ co-doped Cs 2 KYCl 6 , energy transfer from self-trapped excitons (STEs) of Sb 3+ to Mn 2+ produces dual emissions, which has been applied for white light-emitting diodes with chromaticity coordinates of (0.3483, 0.4125) and a color-rendering index of 85.4.