Correlation of structural properties with energy transfer of Eu-doped ZnO thin films prepared by sol-gel process and magnetron reactive sputtering - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Journal of Applied Physics Année : 2010

Correlation of structural properties with energy transfer of Eu-doped ZnO thin films prepared by sol-gel process and magnetron reactive sputtering

Julien Petersen
  • Fonction : Auteur
Christelle Brimont
Mathieu Gallart
  • Fonction : Auteur
Guy Schmerber
Pierre Gilliot
Corinne Ulhaq-Bouillet
  • Fonction : Auteur
Jean-Luc Rehspringer
  • Fonction : Auteur
Silviu Colis
  • Fonction : Auteur
Claude Becker
  • Fonction : Auteur
Aziz Dinia
  • Fonction : Auteur

Résumé

We investigated the structural and optical properties of Eu-doped ZnO thin films made by sol-gel technique and magnetron reactive sputtering on Si (100) substrate. The films elaborated by sol-gel process are polycrystalline while the films made by sputtering show a strongly textured growth along the c-axis. X-ray diffraction patterns and transmission electron microscopy analysis show that all samples are free of spurious phases. The presence of Eu2+ and Eu3+ into the ZnO matrix has been confirmed by x-ray photoemission spectroscopy. This means that a small fraction of Europium substitutes Zn2+ as Eu2+ into the ZnO matrix; the rest of Eu being in the trivalent state. This is probably due to the formation of Eu2O3 oxide at the surface of ZnO particles. This is at the origin of the strong photoluminescence band observed at 2 eV, which is characteristic of the D-5(0)-> F-7(2) Eu3+ transition. In addition the photoluminescence excitonic spectra showed efficient energy transfer from the ZnO matrix to the Eu3+ ion, which is qualitatively similar for both films although the sputtered films have a better structural quality compared to the sol-gel process grown films. (C) 2010 American Institute of Physics. [doi : 10.1063/1.3436628]

Dates et versions

hal-00545160 , version 1 (09-12-2010)

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Citer

Julien Petersen, Christelle Brimont, Mathieu Gallart, Guy Schmerber, Pierre Gilliot, et al.. Correlation of structural properties with energy transfer of Eu-doped ZnO thin films prepared by sol-gel process and magnetron reactive sputtering. Journal of Applied Physics, 2010, 107, pp.123522. ⟨10.1063/1.3436628⟩. ⟨hal-00545160⟩
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