Structural and spectroscopic properties of LaAlBO₃ doped with Eu³⁺ 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 LaAlBO₃ 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 LaAlBO₃:Eu³⁺ consist of 12 trap levels and exhibited dominantly first order kinetics. Photoluminescence (PL) emission was observed in the range 400-800 nm for LaAlBO₃ phosphor doped with Eu³⁺. The dominant emission of Eu³⁺ corresponding to the electric dipole transition ⁵D₀ → ⁷F₂ is located at 616 nm. The sharp emission properties exhibited demonstrate that the LaAlBO₃ is a suitable host for rare-earth ion doped phosphor material. It is observed that for the variable concentration of Eu³⁺ on PL studies, the PL intensity augments with increase in the dopant concentration and the concentration quenching was found after 1 mass% of Eu³⁺. The PL experimental results reveal that LaAlBO₃:Eu³⁺ phosphor as an red emitting phosphor may be promising luminescence materials for the optoelectronic applications.