Synthesis and luminescence properties of Eu³⁺ and Dy³⁺ ions single and co-doped Ba₂LaV₃O₁₁ phosphors for white-light applications

We report the synthesis and luminescence properties of the rare-earth ions doped Ba₂LaV₃O₁₁ phosphors. The Dy³⁺ and Eu³⁺ ions single doped and Dy³⁺/Eu³⁺ ions co-doped Ba₂LaV3O₁₁ phosphors were synthesized via a citrate-based sol-gel method. The surface morphology, phase purity, photoluminescence properties and thermal stability of the synthesized phosphors were determined from the X-ray diffractometer, field-emission scanning electron microscope and spectrofluorometer, respectively. The obtained results indicate that the prepared phosphor material was crystallized in monoclinic phase with the space group P2₁/c (14) and the diffraction peaks were well matched with the standard JCPDS (#40-0105) card values. Under charge transfer band excitation wavelengths, the Eu³⁺ (277 nm) and Dy³⁺ (274 nm) single doped phosphor samples exhibited characteristic red and yellow emissions, respectively. Meanwhile, the Dy³⁺/Eu³⁺ co-doped phosphor samples showed near white-light emission.