Influência da concentração do dopante nas propriedades estruturais e ópticas do YVO4 : Ce

Abstract

Yttrium Vanadate (YVO4) is an excellent host matrix for rare earth (RE) ions, having good thermal stability and high mechanical strength. Making use of the luminescent properties of the RE ions that dope it, YVO4 is widely applied in materials that make use of luminescence, such as televisions, fluorescent lamps, and LEDs. In this work, the structural and optical characteristics of YVO4 doped with different concentrations of Cerium synthesized using glucose as polymeric agent through the modified sol-gel synthesis route, chosen due to its simplicity of synthesis and synthesis in short time and at not too high temperature, were studied. Structural characterization was performed using the X-ray diffraction technique (XRD) which showed desired phase formation for all samples. The optical properties were studied using photoluminescence spectra (PL) and chromaticity diagram, which showed higher intensity for the sample doped with 1 mol% of Cerium. The emission spectra showed the transition 5d – 4f of Cerium and a set of peaks referring to the 2D3/2 – 2F5/2 and 2D3/2 – 2F7/2 transitions. The chromaticity diagram and your data confirmed the emission in the range of blue with low shade variation referring to the presence of Cerium.