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Activation of visible up-conversion luminescence in transparent and conducting ZnO:Er:Yb films by laser annealing
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
Universitat de Barcelona
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.
Òxid de zinc
Luminescència
Pel·lícules fines
Zinc oxide
Luminescence
Thin films
cc-by-nc-nd (c) Elsevier B.V., 2015
info:eu-repo/semantics/embargoedAccess
http://creativecommons.org/licenses/by-nc-nd/3.0/es
Artículo
info:eu-repo/semantics/acceptedVersion
Elsevier B.V.
         

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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
Lluscà, M. (Marta); López Vidrier, Julià; Lauzurica, S.; Canteli, D.; Sánchez-Aniorte, M. I.; Molpeceres, C.; Antony, Aldrin; Hernández, S.; Alcobé, Xavier; Garrido Fernández, Blas; Bertomeu i Balagueró, Joan
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Molpeceres, C.; Lauzurica, S.; García-Ballesteros, J. J.; Morales, M.; Guadaño, G.; Ocaña, J. L.; Fernández, S.; Gandía, J. J.; Villar, Fernando; Nos Aguilà, Oriol; Bertomeu i Balagueró, Joan
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