Remarkable photoluminescence of europium(ii)-doped phosphate cyan@red-emitting phosphors with highly dispersed luminescence centers.

Europium(ii)-doped phosphate cyan@red-emitting phosphors with highly dispersed luminescence centers were developed for the first time by using the deposition-precipitation method. Amazingly, when excited by near-ultraviolet light, the single phosphor generated warm white light with an adjustable correlated colour temperature (4000-2500 K) and high colour-rendering index (R-a approximate to 90).