Temperature-dependent self-trapped models regulating energy transfer in rare earth double perovskites via 5s2 electron doping

Sb 3+ /Sm 3+ co-doping can effectively modulate the luminescence by adjusting the energy transfer in Cs 2 NaYCl 6 double perovskites. Two minima in the excited state of 3 P 1 enable the double self-trapped exciton emission at low temperatures.