Preparation and photoluminescence characteristics of In(OH) 3:xTb3+ obtained by Microwave-Assisted Hydrothermal method

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2013-03-15

Autores

Motta, F. V.
Marques, A. P A
Li, M. S.
Abreu, M. F C
Paskocimas, C. A.
Bomio, M. R D
Souza, R. P.
Varela, José Arana [UNESP]
Longo, Elson [UNESP]

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Crystalline terbium-doped indium hydroxide structures were prepared by a rapid and efficient Microwave-Assisted Hydrothermal (MAH) method. Nanostructures were obtained at a low temperature. FE-SEM images confirm that these samples are composed of 3D nanostructures. XRD, optical diffuse reflectance and photoluminescence (PL) measurements were used to characterize the products. Emission spectra of terbium-doped indium hydroxide (In(OH)3:xTb 3+) samples under excitation (350.7 nm) presented broad band emission referent to the indium hydroxide matrix and 5D4 → 7F6, 5D4 → 7F 5, 5D4 → 7F4, and 5D4 → 7F3 terbium transitions at 495, 550, 590 and 627 nm, respectively. Relative intensities of the Tb 3+ emissions increased as the concentration of this ion increased from 0, 1, 2, 4 and 8 mol%, of Tb3+, but the luminescence is drastically quenched for the In(OH)3 matrix. © 2012 Elsevier B.V. All rights reserved.

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Indium hydroxide, Microwave-Assisted Hydrothermal, Terbium, Broadband emission, Diffuse reflectance, Emission spectrums, Hydrothermal methods, Low temperatures, Microwave-assisted, Photoluminescence characteristics, Photoluminescence measurements, Relative intensity, XRD, Emission spectroscopy, Nanostructures, Photoluminescence, Indium

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Journal of Alloys and Compounds, v. 553, p. 338-342.