| Full text | |
| Author(s): |
Nascimento, Patresio A. M.
[1]
;
Silva, Ariovaldo J. S.
[1]
;
Carvalho, Iure S.
[1]
;
Silva, Ronaldo S.
[1]
;
Paschoal, Carlos William A.
[2]
;
Moulton, Benjamin J. A.
[3]
;
Sampaio, David V.
[4, 3]
;
Freire, R. S.
[2]
;
Rezende, Marcos V. dos S.
[1]
Total Authors: 9
|
| Affiliation: | [1] Univ Fed Sergipe, Grp Nanomat Funcionais GNF, Dept Fis, BR-49100000 Sao Cristovao, SE - Brazil
[2] Univ Fed Ceara, Dept Fis, Campus Pici, POB 6030, BR-65455900 Fortaleza, CE - Brazil
[3] Univ Fed Sao Carlo, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil
[4] Univ Fed Alagoas, Inst Fis, BR-57072970 Maceio, AL - Brazil
Total Affiliations: 4
|
| Document type: | Review article |
| Source: | Journal of Alloys and Compounds; v. 836, SEP 25 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
Li1+xSr0.99PO4:Eu-0.01 (x = 0.1, 0.3 or 0.5) phosphors are prepared using glucose with a modi fied sol-gel method. X-ray diffraction (XRD), scanning electron microscopy and photoluminescence and X-ray absorption spectroscopy are used to characterize the structural and optical behaviour of the phosphors. LSPOE powders have been successfully synthesized by sol-gel route and con firmed by XRD. A variation in lithium stoichiometry does not contribute to signi ficant changes in structural properties, as probed by XRD. The samples have a partially spherical morphology with a high degree of particle agglomeration. The emission intensity of Eu3+ varies with the increase in Li+ content, in agreement with the variation of the symmetric factor. This behaviour veri fies that the Eu3+ ion is in a site of low symmetry. The X-ray absorption near edge structure results reveal that the reduction of Eu3+ to Eu2+ is induced by ionising radiation and the intensity of the X-ray excited optical luminescence emission is inversely proportional to the concentration of lithium. (C) 2020 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 16/15962-0 - Correlation between materials structure and dynamic and optical properties of (Ax, A'1-x)O + SiO2 (A, A' = Pb, Ni, Co, Fe, Cr) series: Raman scattering and molecular dynamics simulations |
| Grantee: | David Vieira Sampaio |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 16/18567-5 - Nuclei entrapment: the pre-nucleation structural ordering of homogeneous nucleating BaO-2SiO2 and CaO-SiO2 glasses |
| Grantee: | Benjamin John Albert Moulton |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |