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Proceedings Paper

Eu3+ as optical probe of the structure in amorphous and nanocrystalline ZnO sol-gel films
Author(s): E. Terán-Hinojosa; J. A. García-Macedo; G. Valverde-Aguilar
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Paper Abstract

Amorphous and nanocrystalline Eu3+-doped ZnO thin films were synthesized by the sol–gel process. The films were spin-coated on glass substrates. The samples were annealed at 500°C for 1 hour to produce a nanocrystalline ZnO/Eu3+ films. The samples were characterized using UV-Vis absorption and infrared spectroscopy. A crystalline phase, wurtzite, was detected by X-ray diffraction. A spectroscopic study of the Eu3+ impurity in function of the heat treatment provided to the ZnO matrix was done. Results of emission and excitation studies at room temperature of Eu3+ inserted in the ZnO matrix are presented. For amorphous and nanocrystalline samples, the relative ratio of the 7F2/7F1 transitions was calculated. The evolution of this ratio was interpreted in terms of the Eu3+ symmetry site change when the nanocrystalline ZnO films. This fact was confirmed measuring the Eu3+ lifetimes.

Paper Details

Date Published: 15 October 2012
PDF: 9 pages
Proc. SPIE 8456, Nanophotonic Materials IX, 845603 (15 October 2012); doi: 10.1117/12.929114
Show Author Affiliations
E. Terán-Hinojosa, Univ. Nacional Autónoma de México (Mexico)
J. A. García-Macedo, Univ. Nacional Autónoma de México (Mexico)
G. Valverde-Aguilar, Instituto Politécnico Nacional (Mexico)

Published in SPIE Proceedings Vol. 8456:
Nanophotonic Materials IX
Stefano Cabrini; Taleb Mokari, Editor(s)

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