Enhanced red emission in Sr (1-x) EuxMo0. 5W0. 5O4 (x= 0.01, 0.02, 0.04) phosphor and spectroscopic analysis for display applications

摘要: The particles of the solid solution of strontium molybdate and tungstate (SrMo0.5W0.5O4) were doped with Eu3+ ions at concentrations of 1, 2 and 4 mol% synthesized by the microwave-hydrothermal method (MHM). The structural analyses of the particles were conducted by XRD with Rietveld Refinement and FT-Raman spectroscopy. The crystallization and growth of particles were investigated by FEG-SEM and proposed a mechanism of particle development involving the steps: nucleation and further growth. The SrMo0.5W0.5O4 presented white emission with the chromaticity coordinates: (0.32; 0.40). The Sr(1-x)EuxMo0.5W0.5O4 samples exhibited an increase in luminescence intensity in the red region as the concentration of Eu3+ increases, a behavior attributed to the 5D0 → 7F2 transition of Eu3+ (623 nm). The Sr(1-x)EuxMo0.5W0.5O4 samples showed high color purity (≈ 97%), as well as the results of …