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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/6877
Título: 
Synthesis and structural characterization of Eu(III)-doped Zn7Sb2O12
Autor(es): 
Instituição: 
Universidade Estadual Paulista (UNESP)
ISSN: 
0022-2461
Financiador: 
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Resumo: 
In addition to the lanthanide series elements, Europium is one of the chemical elements of greatest interest for the development of species with oxidation state +3 (III), which leads to interesting electronic transitions. In a general sense, their emission spectrum lines are narrow and sensitive to effects of the ligand field around metallic ions. This property allows the use of Eu(III) as a structural probe. In this work, samples of semiconductor Zn7Sb2O12 and of solid solutions based on isoelectronically Eu(III)-doped Zn7Sb2O12 with stoichiometry Zn7-3xEu2xSb2O12 were prepared. Both Zn7Sb2O12 and Zn7-3xEu2xSb2O12 were synthesized via a chemical route using Pechini's method and characterized by Fourier transform infrared absorption vibrational spectroscopy (FTIR) and photoluminescence spectroscopy. In order to perform further spectral analyses, each spectrum was adjusted using a set of Gaussian functions. The FTIR spectrum analysis showed a slight band shift of the vibration mode assigned to the Sb-O bonding ascribed to the [SbO6] octahedron vibration. The theoretical fitting of the luminescence curves showed a broadening of the most intense emission peaks related to the transition Eu(III) D-5(0) -> F-7(2). As a whole, the results suggest that a less symmetric Eu(III) site occupation in inverse spinel structure may occur in sites close to the antimony octahedron, involving, however, non-substitutional site occupation.
Data de publicação: 
1-Ago-2010
Citação: 
Journal of Materials Science. New York: Springer, v. 45, n. 15, p. 4216-4223, 2010.
Duração: 
4216-4223
Publicador: 
Springer
Fonte: 
http://dx.doi.org/10.1007/s10853-010-4516-2
Endereço permanente: 
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/6877
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