| Full text | |
| Author(s): |
Freiria, Gabriela S.
;
Ribeiro, Amanda L.
;
Verelst, Marc
;
Nassar, Eduardo J.
;
Rocha, Lucas A.
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Journal of the Brazilian Chemical Society; v. 29, n. 3, p. 8-pg., 2018-03-01. |
| Abstract | |
In this study, Dy3+-doped LaNbO4 phosphors with a blue to white emission that can be tuned by varying the activator concentration were prepared by one-step spray pyrolysis process. According to the powder X-ray diffraction results, increasing Dy3+ concentration favored the tetragonal phase. Slight changes were observed in the recorded Raman spectra as a function of Dy3+ concentrations while SEM (scanning electron microscopy) micrographs presented similar profiles regardless the Dy3+ amount. Investigation of Dy3+ emission data in the visible range showed that rising the Dy3+ concentration progressively shifted the emission towards the white color. All samples presented a wide excitation range from 254 to 475 nm. (AU) | |
| FAPESP's process: | 14/24658-8 - Phosphors-RGB obtained by the spray pyrolysis process |
| Grantee: | Gabriela Simões Freiria |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 11/51858-0 - Estudo e caracterização de sistemas à base de óxido de nióbio a partir dos processos: sol-gel não-hidrolítico e pirólise de aerossol |
| Grantee: | Eduardo José Nassar |
| Support Opportunities: | Regular Research Grants |
| 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 |