@inproceedings{1660812811ee408889fcf2b1cdf097c7,
title = "Eu3+ as optical probe of the structure in amorphous and nanocrystalline ZnO sol-gel films",
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 Eu 3+ inserted in the ZnO matrix are presented. For amorphous and nanocrystalline samples, the relative ratio of the 7F 2/7F1 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.",
keywords = "Lifetimes, Luminescence, Optical absorption, Rare earth, Sol-gel, Zinc oxide",
author = "E. Ter{\'a}n-Hinojosa and Garc{\'i}a-Macedo, {J. A.} and Guadalupe Valverde-Aguilar",
year = "2012",
doi = "10.1117/12.929114",
language = "Ingl{\'e}s",
isbn = "9780819491732",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Nanophotonic Materials IX",
note = "Nanophotonic Materials IX ; Conference date: 15-08-2012 Through 16-08-2012",
}