Sr3MgSi2O8 : Eu2+ blue-emitting phosphors were prepared by a flux method and their luminescent properties were investigated. The excitation spectra were broad (250-500 nm), showing strong excitation intensities at 370-410 nm, while the intense blue emission was observed at around 460 nm assigned to the 4f(6)5d(1)-4f(7) transition of the Eu2+ ions incorporated into the Sr(I) sites. The strongest emission was obtained from the starting mixture with the excess Sr content. The emission intensity varied with firing temperatures, an amount of a flux, and the Eu content. These luminescent properties demonstrate that Sr3MgSi2O8 : Eu2+ powders are promising blue phosphors for use in white light emitting diodes using near ultraviolet chips.

Keywords: Strontium magnesium silicate; Phosphor; Luminescence