Optical analysis of RE³⁺ (RE = Eu,Tb):MgLa₂ V₂ O₉ nano-phosphors

Red and green rare-earth ion (RE³⁺ ) (RE = Eu, Tb):MgLa₂ V₂ O₉ micro-powder phosphors were produced utilizing a standard solid-state chemical process. The X-ray diffraction examination performed on the phosphors showed that they were crystalline and had a monoclinic structure. The particles grouped together, as shown in the scanning electron microscopy (SEM) images. Powder phosphors were examined using a variety of spectroscopic techniques, including photoluminescence (PL), Fourier-transform infrared, and energy dispersive X-ray spectroscopy. Brilliant red emission at 615 nm (⁵ D₀  → ⁷ F₂ ) having an excitation wavelength (λ_exci ) of 396 nm (⁷ F₀  → ⁵ L₆ ) and green emission at 545 nm (⁵ D₄  → ⁷ F₅ ) having an λ_exci  = 316 nm (⁵ D₄  → ⁷ F₂ ) have both been seen in the emission spectra of Tb³⁺ :MgLa₂ V₂ O₉ nano-phosphors. The emission mechanism that is raised in Eu³⁺ :MgLa₂ V₂ O₉ and Tb³⁺ :MgLa₂ V₂ O₉ powder phosphors has been explained in an energy level diagram.