Enhanced photoluminescence of SrWO₄:Eu³⁺ red phosphor synthesized by mechanochemically assisted solid state metathesis reaction method at room temperature

Optically efficient europium activated alkaline earth metal tungstate nano phosphor (SrWO₄) with different doping concentrations have been synthesized by mechanochemically assisted solid state metathesis reaction at room temperature for the first time. The XRD and Raman spectra results indicated that the prepared powders exhibit a scheelite-type tetragonal structure. FTIR spectra exhibited a high absorption band situated at around 854 cm⁻¹, which was ascribed to the W–O antisymmetric stretching vibrations into the [WO₄]²⁻ tetrahedron groups. Analysis of the emission spectra with different Eu³⁺ concentrations revealed that the optimum dopant concentration for SrWO₄: x Eu³⁺ phosphor is about 8 mol% of Eu³⁺.The red emission intensity of the SSM prepared SrWO₄: 0.08Eu³⁺ phosphors are 2 times greater than that of the commercial Y₂O₂S: Eu³⁺ red phosphor prepared by the conventional solid state reaction method. All the results indicate that the phosphor is a promising red phosphor pumped by NUV InGaN chip for fabricating WLED