Structural and spectroscopic properties of LaAlBO doped with Eu ions.

In this study, we performed X-ray diffraction (XRD) and environmental scanning electron microscope (ESEM) techniques to examine the structure and morphological observation of the samples and thermoluminescence (TL) experiments to extract the trapping parameters and dosimetric properties of LaAlBO phosphors doped with Eu at various doping concentrations. Diffraction patterns of obtained sample were well consistent JCPDS card No 98-009-7945, indicating the formation of pure phase. The TL kinetic parameters were estimated by CGCD software. TL glow curves of LaAlBO:Eu consist of 12 trap levels and exhibited dominantly first order kinetics. Photoluminescence (PL) emission was observed in the range 400-800 nm for LaAlBO phosphor doped with Eu. The dominant emission of Eu corresponding to the electric dipole transition D → F is located at 616 nm. The sharp emission properties exhibited demonstrate that the LaAlBO is a suitable host for rare-earth ion doped phosphor material. It is observed that for the variable concentration of Eu on PL studies, the PL intensity augments with increase in the dopant concentration and the concentration quenching was found after 1 mass% of Eu. The PL experimental results reveal that LaAlBO:Eu phosphor as an red emitting phosphor may be promising luminescence materials for the optoelectronic applications.