Optical characterization of europium-doped indium hydroxide nanocubes obtained by Microwave-Assisted Hydrothermal method

AUTOR(ES)

Motta, Fabiana Villela da, Marques, Ana Paula de Azevedo, Araújo, Vinícius Dantas de, Tavares, Mara Tatiane de Souza, Delmonte, Mauricio Roberto Bomio, Paskocimas, Carlos Alberto, Li, Máximo Siu, Nascimento, Rubens Maribondo do, Longo, Elson

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

13/06/2014

RESUMO

Crystalline europium-doped indium hydroxide (In(OH)3:Eu) nanostructures were prepared by rapid and efficient Microwave-Assisted Hydrothermal (MAH) method. Nanostructures were obtained at 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 europium-doped indium hydroxide (IH:xEu) samples under excitation (350.7 nm) presented broad band emission regarding the indium hydroxide (IH) matrix and 5D0 → 7F0, 5D0 → 7F1, 5D0 → 7F2, 5D0 → 7F3 and 5D0 → 7F4 europium transitions at 582, 596, 618, 653 and 701 nm, respectively. Relative intensities of Eu3+ emissions increased as the concentration of this ion increased from 0, 1, 2, 4 and 8 mol %, of Eu3+, but the luminescence is drastically quenched for the IH matrix.

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