Artigo
Preparation and photoluminescence characteristics of In(OH) 3:xTb3+ obtained by Microwave-Assisted Hydrothermal method
Fecha
2013-03-15Registro en:
Journal of Alloys and Compounds, v. 553, p. 338-342.
0925-8388
10.1016/j.jallcom.2012.11.063
WOS:000314640600058
2-s2.0-84873800804
Autor
Universidade Federal do Rio Grande do Norte (UFRN)
Universidade Federal de São Paulo (UNIFESP)
Universidade de São Paulo (USP)
Universidade Federal de São Carlos (UFSCar)
Universidade Estadual Paulista (Unesp)
Resumen
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.