Aluminate matrix doped with Tm3+/Tb3+/Eu3+ obtained by non-hydrolytic sol-gel route: White light emission

Author(s)

Pereira, Paula F. S. ^[1] ; Matos, Marcela G. ^[2] ; Ferreira, Camila M. A. ^[2] ; De Faria, Emerson H. ^[2] ; Calefi, Paulo S. ^[2] ; Rocha, Lucas A. ^[2] ; Ciuffi, Katia J. ^[2] ; Nassar, Eduardo J. ^[2]

Affiliation

^[1] Univ Fed Sao Carlos UFSCar, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Franca, BR-14404600 Franca, SP - Brazil

• Document type: Journal article
• Source: Journal of Luminescence; v. 146, p. 394-397, FEB 2014.
• Web of Science Citations: 16

Abstract

RGB represents the union of the colors red (R), green (G), and blue (B), the colors that are most often used in electronic displays. Several kinds of host can serve as phosphors, but the appropriate amount of dopant in tricolor white light with excitation at the same wavelength remains an issue. We used yttrium aluminum garnet (YAG) as host for the lanthanides europium, terbium, and thulium. We prepared the YAG host by the non-hydrolytic sol-gel methodology and doped it with the same amount of lanthanide ions - 1% in relation to the amount of yttrium. We have already reported the characterization of this sample previously. Here, we aimed to investigate the emission spectrum of the sample in the red, green, and blue regions when excited at a certain wavelength. The x and y coordination chromaticity - x=0.32 and y=0.35 - presented values close to those of the white color (x=y=0.33). In conclusion, the YAG host doped with lanthanides and prepared by the sol-gel methodology will help prepare efficient phosphors for several applications. (C) 2013 Elsevier B.V. All rights reserved. (AU)

• 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
• FAPESP's process: 12/20908-4 - PREPARATION AND CHARACTERIZATION OF THE LUMINESCENT FILMS BASED OF YTTRIUM ALUMINUM OXIDES VIA SOL-GEL
• Grantee: Camila Maria Alves Ferreira
• Support Opportunities: Scholarships in Brazil - Master
• 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