Novel red phosphor of double perovskite compound La2MgTiO6:xEu3+

A novel red phosphor La2MgTiO6:xEu(3+) was successfully synthesized by the conventional solid state method. Excited by ultraviolet (395 nm) and blue (465 nm) light, La2MgTiO6:xEu(3+) exhibits intense red emission. Due to the lack of inversion symmetry at the doping sites, the dominant emission peak is from the transition D-5(0) -> F-7(2). Non-radiative transitions were demonstrated to be from dipole-dipole interactions and the critical distance was estimated to be similar to 9.19 angstrom. When Eu3+ ions' concentration reaches 15%, the emission intensity is about three times higher than that of the conventional phosphor Y2O3:Eu3+. The Commission International de L'Eclairage chromaticity coordinate was calculated to be x=0.657 and y=0.343. All the results indicate that La2MgTiO6:xEu(3+) has superior luminescence properties. (C) 2012 Elsevier B.V. All rights reserved.