Novel red phosphor of double perovskite compound La2MgTiO6:xEu3+

A novel red phosphor La2MgTiO6:xEu3+ was successfully synthesized by the conventional solid state method. Excited by ultraviolet (395 nm) and blue (465 nm) light, La2MgTiO6:xEu3+ exhibits intense red emission. Due to the lack of inversion symmetry at the doping sites, the dominant emission peak is from the transition 5D0→7F2. Non-radiative transitions were demonstrated to be from dipole–dipole interactions and the critical distance was estimated to be ∼9.19 Å. When Eu3+ ionsʹ concentration reaches 15%, the emission intensity is about three times higher than that of the conventional phosphor Y2O3:Eu3+. The Commission International de LʹEclairage chromaticity coordinate was calculated to be x=0.657 and y=0.343. All the results indicate that La2MgTiO6:xEu3+ has superior luminescence properties.