Title:
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Activation of visible up-conversion luminescence in transparent and conducting ZnO:Er:Yb films by laser annealing
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Author:
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Lluscà, M. (Marta); López Vidrier, Julià; Lauzurica, S.; Sánchez-Aniorte, M. I.; Antony, Aldrin; Molpeceres, C.; Hernández, S.; Garrido Fernández, Blas; Bertomeu i Balagueró, Joan
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Other authors:
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Universitat de Barcelona |
Abstract:
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Transparent and conducting ZnO:Er:Yb thin films with visible up-conversion (660-nm emission under 980-nm excitation) were fabricated by RF magnetron sputtering. The as-deposited films were found to be transparent and conducting and the activation of the Er ions in these films to produce up-conversion luminescence was achieved by different post deposition annealing treatments in air, vacuum or by laser annealing using a Nd:YVO4 laser. The structural, electrical and optical properties and the up-conversion efficiency of these films were found to be strongly influenced by the annealing method, and a detailed study is reported in this paper. It has been demonstrated that, although the air annealing was the most efficient in terms of up-conversion, laser annealing was the only method capable of activating Er ions while preserving the electrical conductivity of the doped films. It has been shown that a minimum energy was needed in laser annealing to optically activate the rare earth ions in the ZnO host material to produce up-conversion. Up-converting and transparent conducting ZnO:Er:Yb films with an electrical resistivity of 5×10-2 Ω·cm and transparency ~80% in the visible wavelength range has been achieved by laser annealing. |
Subject(s):
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-Òxid de zinc -Luminescència -Pel·lícules fines -Zinc oxide -Luminescence -Thin films |
Rights:
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cc-by-nc-nd (c) Elsevier B.V., 2015
http://creativecommons.org/licenses/by-nc-nd/3.0/es |
Document type:
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Article Article - Accepted version |
Published by:
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Elsevier B.V.
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