Synthesis, optical properties and Judd-Ofelt analysis of Eu3+ doped Ca2KMg2V3O12

Abstract

The synthesis of undoped and the Eu3+ doped garnet-type vanadate Ca2KMg2V3O12 (CKMV) was achieved using a solid-state reaction method. The phase formation of the samples was confirmed through powder XRD analysis. The morphological properties of the material were examined using SEM, and elemental mapping through EDAX provided information about the elements present in the samples. The band gap energy of CKMV and CKMV:0.05Eu3+ was determined using DRS measurements. Photoluminescence properties of CKMV and CKMV: xEu3+ (x = 0.01–0.09) were investigated under excitation at 370 nm, with emission at 612 nm. Additionally, the dominant characteristic peak of Eu3+ was studied through photoluminescence emission under excitation at 472 nm. Lifetime decay analysis and CIE color coordinates were obtained. Judd-Ofelt intensity parameters were calculated based on the emission spectra, elucidating the radiative properties of CKMV:0.05Eu3+. Temperature-dependent photoluminescence demonstrated the good thermal stability of the optimized sample. From the temperature dependent life time analysis, the sensitivity of the material has been calculated. These findings suggest that this phosphor is well-suited for use in solid-state lighting applications.