Synthesis and photoluminescence of Eu3+-activated double perovskite NaGdMg(W, Mo)O-6 - a potential red phosphor for solid state lighting

A novel high-efficiency double perovskite NaGdMg(W, Mo)O-6:Eu phosphor is obtained by an improved citrate-EDTA complexing method. An emission intensity over twenty times that of a commercial red phosphor is observed. The host material has high-efficiency absorption, high doping concentration for many rare earth ions and intense emission with different colors.