Effect of gadolinium incorporation on the structure and luminescence properties of niobium-based materials

Author(s)

Oliveira, Lidia Resende ^[1] ; Moscardini, Susane Bonamin ^[1] ; Molina, Eduardo Ferreira ^[1] ; Nassar, Eduardo Jose ^[1] ; Verelst, Marc ^[2] ; Rocha, Lucas Alonso ^[1]

Affiliation

^[1] Univ Franca UNIFRAN, Dept Quim, CP 82, BR-14404600 Franca, SP - Brazil

^[2] Ctr Elaborat Mat & Etud Struct CNRS, BP 4347, F-31055 Toulouse 4 - France

• Document type: Journal article
• Source: Nanotechnology; v. 29, n. 23 JUN 8 2018.
• Web of Science Citations: 1

Abstract

In this work, we have investigated how the concentration of Gd3+ ions affects the structural and luminescent properties of niobium oxide-based matrices doped with Eu3+ ions obtained by the adapted non-hydrolytic sol-gel route. X-ray diffractograms revealed that increasing the concentration of Gd3+ ions favored the onset of the Gd2O3 structure decreasing the GdNbO4 phase. The excitation spectra (lambda(em) = 613 nm) presented bands corresponding to the F-7(0) -> L-5(J) transitions (L = D, G, and L, where J = 0-7), attributed to the Eu3+ ions, and a broad band at 270 nm, assigned to the charge transfer of the NbO43- group. The emission spectra contained bands refer to the D-5(0) -> F-7(J) internal configuration transitions (J = 0, 1, 2, 3, and 4). Finally, the CIE chromaticity coordinates met the standard for the color red established by the National Television Standard Committee (NTSC). (AU)

• FAPESP's process: 14/22521-5 - Study and characterization of GdNbO4:Eu3+ phosphors prepared by the non-hydrolytic sol-gel process
• Grantee: Lídia Resende Oliveira
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 15/20298-0 - Obtention of luminescent LaNbO4:Ln (ln = Dy, TM, er and Yb) matrices prepared by spray pyrolysis process
• Grantee: Lucas Alonso Rocha
• Support Opportunities: Regular Research Grants