CONCENTRATION EFFECT OF THE EU3+ AND BI3+ IN THE PHOTOLUMINESCENCE PROPERTIES OF YVO4 MATRIX

Author(s)

Marcela G. Matos ^[1] ; Emerson H. de Faria ^[2] ; Katia J. Ciuffi ^[3] ; Lucas A. Rocha ^[4] ; Eduardo J. Nassar ^[5] ; Marc Verelst ^[6]

Affiliation

^[1] Universidade de Franca - Brasil

^[2] Universidade de Franca - Brasil

^[3] Universidade de Franca - Brasil

^[4] Universidade de Franca - Brasil

^[5] Universidade de Franca - Brasil

^[6] Centre d'Elaboration de Materiaux et d'Etudes Structurales - França

• Document type: Journal article
• Source: Química Nova; v. 41, n. 8, p. 849-856, 2018-08-00.

Abstract

Inorganic matrices have been extensively studied for several applications, mainly doped with lanthanoid ions presenting special spectroscopic properties. The radiation emission can be affected by several factors, such as; matrix, synthesis methodology, activating ions and sensitizers, and concentrations. Thus, in this work the matrix of yttrium vanadate doped with Eu3+ ions as activator and Bi3+ ions as sensitizer was prepared by the non-hydrolytic sol-gel methodology. Europium (III) and Bismuth (III) ions concentrations were varied in 1, 3 and 5% in mol with respect to the Y3+ ion and the samples were heat treated at 1000 °C. The X-ray diffraction analyzes showed a single phase of the yttrium vanadate matrix, indicating the non-influence of the dopant ions on the crystalline structure. The dopants concentrations presented influences on the spectroscopic properties of the emitting ion, the intensity parameters (Ω2 e Ω4), increased as a function of the increase of Bi3+ concentration, affecting the covalence of the bond and the rigidity of the system. The increase of Eu3+ concentration directly affected its environment, decreasing the symmetry and increasing the quantum efficiency. Finally, increasing the dopant ions promoted the decreasing the crystallite size. (AU)

• FAPESP's process: 11/09823-4 - Use of the europium III to reveal structure of the matrices obtained by sol-gel methodology
• Grantee: Eduardo José Nassar
• Support Opportunities: Regular Research Grants
• FAPESP's process: 11/20313-8 - Intensification of the luminescence of lanthanides ions (Eu3+, Tb3+, and Tm3+) incorporated into oxides GdAlO3, Y3Al5O12, and YVO4 by Bi3+
• Grantee: Marcela Guedes Matos
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 12/11673-3 - Thin films obtained by spin and dip-coating using sol-gel methodology
• Grantee: Eduardo José Nassar
• Support Opportunities: Regular Research Grants