Materials Research (Jun 2014)

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

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

DOI
https://doi.org/10.1590/S1516-14392014005000084
Journal volume & issue
Vol. 17, no. 4
pp. 933 – 939

Abstract

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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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