A novel red phosphor Na2Ca4Mg2Si4O15:Eu3+ for plasma display panels

A novel red emitting phosphor, Eu3+-doped Na2Ca4Mg2Si4O15, was prepared by the solid-state reaction. X-ray powder diffraction (XRD) analysis confirmed the formation of Na2Ca4Mg2Si4O15:Eu3+. Field-emission scanning electron-microscopy (FE-SEM) observation indicated a narrow size-distribution of about 300 nm for the particles with spherical shape. Upon excitation with vacuum ultraviolet (VUV) and near UV light, the phosphor showed strong red-emission lines at around 611 and 617 nm, respectively, corresponding to the forced electric dipole 5D0 → 7F2 transition of Eu3+, and the highest PL intensity at 617 nm was found at a content of about 8 mol% Eu3+. The optical properties study suggests that it is a potential candidate for plasma display panels (PDPs) application.