Preparation, characterization and luminescence of La2TeO6 phosphor doped with Eu3+

Phosphors of La2TeO6 doped with Eu3+ ions have been synthesized by the oxidation of the corresponding rare-earths oxytellurides of formula La2−xEuxO2Te (x = 0.02, 0.06, and 0.1) at 1050 K. Powder X-ray diffraction confirms that the as prepared materials consist of the orthorhombic La2TeO6 as main phase. The photoluminescence (PL) of red-emitting La2−xEuxTeO6 powder phosphors is reported. The emission spectrum, exhibits an intense emission peak due to 5D0 → 7F2 transition at 616 nm, which indicates that the Eu3+ ion occupies a non-centrosymmetric site in the host lattice. These materials could find application for use as lamp phosphors in the red region.