The Luminescence in Self Activated and Sm3+ rich Garnet Phosphor Sr2NaZn2V3O12 prepared by Solid-State Reaction

Abstract

A new self-activated vanadate garnet phosphor Sr₂NaZn₂V₃O₁₂ and doped with Sm³⁺ vanadate garnet phosphor Sr₂NaZn₂V₃O₁₂ were produced by a simple conventional solid-state reaction that calcined for six hours at 950 degrees Celsius and then left to cool to room temperature. Vanadate garnet phosphor is utilized for high-performance tasks because of its excellent strength and hardness. The single phase garnet structures in the prepared materials have been verified by X-ray diffraction (XRD) and Rietveld polishing. The behaviors of rare earth-doped luminescence and self-activated luminescence have been thoroughly examined. The prepared Sr₂NaZn₂V₃O₁₂ compound was observed a wide-band at wavelength of 485 in visible region of greenish emission that originates due to VO₄³⁻ emission. With lifetime measurement and photoluminescence (PL), In Sr₂NaZn₂V₃O₁₂: Sm³⁺ garnet-type phosphors, the energy transfer characteristics from VO₄³⁻ (vanadate) to Sm³⁺ (samarium trivalent) ions have been shown. While excitation was reported at 485 nm for vanadate garnet phosphor and 601 nm for samarium-rich garnet phosphor, the produced materials were excited by 338 nm for vanadate and 405 nm for Sm³⁺ rich phosphor. Scanning electron microscopy was used to study the topography and morphology. The findings suggest that Sm³⁺ doped Sr₂NaZn₂V₃O₁₂ garnet phosphors and self-activated Sr₂NaZn₂V₃O₁₂ exhibit significant promise for use in near-UV stimulated white LEDs.