Enhanced red emission in Sr(1-x)EuxMo0.5W0.5O4 (x = 0.01, 0.02, 0.04) phosphor and spectroscopic analysis for display applications.
LOVISA, L. X.; SANTOS, D. F.; SANTIAGO, A. A. G.; SIU LI, Máximo; LONGO, Elson; MOTTA, F. V.; BOMIO, M. R. D.
LOVISA, L. X.; SANTOS, D. F.; SANTIAGO, A. A. G.; SIU LI, Máximo; LONGO, Elson; MOTTA, F. V.; BOMIO, M. R. D.
Abstract: 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 SrMo0.5- W0.5O4 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)EuxMo0.5- W0.5O4 samples showed high color purity (& 97%), as well as the results of the color reproduction index (CRI) reached 80% level. The radiation luminous efficiency (LER) presented by the samples exhibited values of 322 lm.W-1. According to the quality of the photometric parameters presented, the samples have attributions for application in solid-state lighting devices.
@article={003076768,author = {LOVISA, L. X.; SANTOS, D. F.; SANTIAGO, A. A. G.; SIU LI, Máximo; LONGO, Elson; MOTTA, F. V.; BOMIO, M. R. D.},title={Enhanced red emission in Sr(1-x)EuxMo0.5W0.5O4 (x = 0.01, 0.02, 0.04) phosphor and spectroscopic analysis for display applications},journal={Journal of Materials Science},note={v. 57, n. 19, p. 8634-8647},year={2022}}