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dc.contributor.authorFaria Filho, Fausto M.-
dc.contributor.authorGoncalves, Rogeria R.-
dc.contributor.authorRibeiro, Sidney J. L.-
dc.contributor.authorMaia, Lauro J. Q.-
dc.identifier.citationMaterials Science And Engineering B-advanced Functional Solid-state Materials, v. 194, p. 21-26, 2015.-
dc.description.abstractSamples of (1 - x)[0.70SiO(2) + 0.30Al(2)O(3)] + xGeO(2) compositions, containing x = 0.05, 0.10, 0.20, 0.30, 0.40 and 0.50, and doped with 1 mol% of Er3+, were prepared by a mixed route (sol gel process and Pechini method). Transparent gels were synthesized and homogeneous powders were obtained by heat treatments from 800 degrees C to 1050 degrees C. The final powders were characterized by X-ray diffraction, Fourier transform infrared spectroscopy and high-resolution transmission electron microscopy. The optical properties were studied by photoluminescence measurements in the infrared region, and the average lifetime of the metastable state I-4(13/2) of Er3+ ions and the full-width at half maximum (FWHM) were determined. A silica-rich amorphous phase and nanocrystallites with orthorhombic structure of Al6Ge2O13 phase were obtained. The samples present a broad emission centered at around 1532 nm under excitation at 977 nm, with a FWHM of 53 nm and a lifetime of 5.6 ms. The synthesized compounds by an easy chemical procedure are potentially applicable in integrated optical systems. (C) 2015 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
dc.description.sponsorshipFUNAPE/UFG Brazilian agency-
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
dc.publisherElsevier B.V.-
dc.sourceWeb of Science-
dc.subjectSiO2-Al2O3-GeO2 systemen
dc.subjectStructural propertiesen
dc.subjectPhotoluminescence emissionen
dc.subjectLow cost processen
dc.titleStructural and optical properties of Er3+ doped SiO2-Al2O3-GeO2 compounds prepared by a simple routeen
dc.contributor.institutionUniversidade Federal de Goiás (UFG)-
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationUniv Fed Goias, Inst Fis, BR-74001970 Goiania, Go, Brazil-
dc.description.affiliationUniv Sao Paulo, Fac Filosofia Ciencias &Letras Ribeirao Pret, Dept Quim, BR-14040901 Ribeirao Preto, SP, Brazil-
dc.description.affiliationSao Paulo State Univ UNESP, Inst Chem, BR-14801970 Araraquara, SP, Brazil-
dc.description.affiliationUnespSao Paulo State Univ, UNESP, Inst Chem, Departamento de Química Geral e Inorgânica, BR-14801970 Araraquara, SP, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofMaterials Science And Engineering B-advanced Functional Solid-state Materials-
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