| Full text | |
| Author(s): Show less - |
Carvalho, Iure da S.
[1]
;
Barbosa, Amanda I. dos S.
[1]
;
Silva, Ariosvaldo J. S.
[1]
;
Nascimento, Patresio A. M.
[1]
;
Andrade, Adriano B.
[1]
;
Sampaio, David V.
[2]
;
Junot, Danilo O.
[1]
;
da Cunha, Thiago R.
[2]
;
Jesus, Lilian M.
[2]
;
Silva, Ronaldo S.
[1]
;
Rezende, Marcos V. dos S.
[1]
Total Authors: 11
|
| Affiliation: | [1] Univ Fed Sergipe, Dept Fis, GNF, BR-49100000 Sao Cristovao, SE - Brazil
[2] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Materials Chemistry and Physics; v. 228, p. 9-14, APR 15 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
Eu-doped (Y2.99-xGdx)Al5O12 phosphors (with x = 0, 0.5, 1, 1.5, 2, 2.5, and 2.99) were prepared by a sol-gel method using polyvinylalcohol (PVA) as gel agent. The crystal structures were characterized through X-ray diffraction and the resulting data were refined by the Rietveld method, which shows a linear increase of the lattice parameter with the Gd content. Further structural characterization was carried out via Raman spectroscopy. The effect of substituting Y3+ by Gd3+ on the Eu-doped Y3Al5O12 (YAG) photoluminescence properties was investigated using vacuum ultraviolet (VUV) and ultraviolet (UV) excitation. The excitation and emission spectra of the produced (Y2.99-xGdx)Al5O12 phosphors indicate that their luminescence properties are strongly dependent on the Gd3+ substitution. Our results also reveal a nonlinear decrease in the band-gap of these materials by increasing the Gd concentration. (AU) | |
| FAPESP's process: | 16/15962-0 - Correlação entre estrutura e propriedades dinâmicas e ópticas de materiais da serie (Ax, A'1-x)O + SiO2 (A, A' = Pb, Ni, Co, Fe, Cr): estudo por espalhamento Raman e simulações por Dinâmica Molecular. |
| Grantee: | David Vieira Sampaio |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 13/07793-6 - CeRTEV - Center for Research, Technology and Education in Vitreous Materials |
| Grantee: | Edgar Dutra Zanotto |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |