Unveiling Structural, Morphological, Optical Properties and Photoluminescence of Novel Eu and Tb Doped NaMoO.2HO Phosphor.

The present paper explores the luminescence response of trivalent rare earth ions doped novel NaMoO.2HO phosphors for its possibilities towards the advancement of currently available red and green phosphors. The work presents an original research study on NaMoO.2HO phosphors and provides a brief overview of molybdate-based phosphors. Optically efficient trivalent terbium and europium-activated NaMoO.2HO phosphors are synthesized using the conventional solid-state reaction method. It was found through XRD that the samples belong to the orthorhombic crystal system and have the space group P. Raman spectra show all the major peaks are rising due to the MoO4 group. The SEM images reveal differences in particle morphology between the undoped and doped samples. UV-Visible spectroscopy showed the interaction of samples with light and the bandgap energies were calculated. We record the excitation and emission spectra to see how much red and green light they emit for Eu and Tb doped samples respectively. The calculated CIE coordinates, CCT and colour purity show that the phosphor is similar to commercially available red and green phosphors. Along with that, this study shows the energy transfer between MoO4 and rare earth dopants, which can help us figure out how to improve emission efficiency.