Abstract
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 Zn7−3x
Eu2x
Sb2O12 were prepared. Both Zn7Sb2O12 and Zn7−3x
Eu2x
Sb2O12 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) 5D0 → 7F2. 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.
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 Zn7−3x
Eu2x
Sb2O12 were prepared. Both Zn7Sb2O12 and Zn7−3x
Eu2x
Sb2O12 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) 5D0 → 7F2. 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.
- Content Type Journal Article
- DOI 10.1007/s10853-010-4516-2
- Authors
- A. C. S. Silva, Unesp Univ Estadual Paulista Depto. de Física, Química e Biologia, Faculdade Ciências e Tecnologia P.O. Box 467 Presidente Prudente SP 19060-900 Brazil
- G. G. Souza, Unesp Univ Estadual Paulista Depto. de Física, Química e Biologia, Faculdade Ciências e Tecnologia P.O. Box 467 Presidente Prudente SP 19060-900 Brazil
- M. A. L. Nobre, Unesp Univ Estadual Paulista Depto. de Física, Química e Biologia, Faculdade Ciências e Tecnologia P.O. Box 467 Presidente Prudente SP 19060-900 Brazil
- A. M. Pires, Unesp Univ Estadual Paulista Depto. de Física, Química e Biologia, Faculdade Ciências e Tecnologia P.O. Box 467 Presidente Prudente SP 19060-900 Brazil
- Journal Journal of Materials Science
- Online ISSN 1573-4803
- Print ISSN 0022-2461
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