Preparation and luminescence properties of BaZrO3:Eu phosphor powders

The phosphor powders of BaZrO3 doped with Eu3+ was prepared by solid-state reaction. The powder samples were characterized by X-ray diffraction (XRD) and photoluminescence (PL). XRD analysis showed the formation of pure solid solution BaZr1-xEuxO3 up to 4 mol% of Eu3+ concentration. The room temperature excitation spectra vary with the Eu3+ concentration and consist of an intense charge transfer band and weak f-f transitions. The PL spectra, excited at 258.0 nm, consist of 4f-4f emission transitions from the D-5(0) excited level of the Eu3+ ions to the F-7(J) (J = 0-4) levels. The appearance of intense D-5(0)-F-7(0) transition originated from the J-J mixing suggests the distortion of EuO6 octahedra in the BaZr1-xEuxO3 host lattice. The dependence of luminescence intensity on the Eu3+ concentration in BaZrO3:Eu was studied. (c) 2007 Published by Elsevier B.V.