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Article Dans Une Revue Journal of Luminescence Année : 2006

Confinement effects in sesquioxydes

B. Mercier
  • Fonction : Auteur
C. Dujardin
  • Fonction : Auteur
G. Ledoux
Catherine Louis
  • Fonction : Auteur
Olivier Tillement

Résumé

When the size of a particle is decreased to nano-scales, confinement effects induce strong changes. The luminescence of Eu3+-doped Gd 2O3 nanoparticles has been studied as a function of both the temperature and the size of the nanoparticles. Two consequences of the small sizes in Eu3+-doped Gd2O3 are observed. First the linewidth of the Eu3+ transitions are inhomogeneously broadened at low temperature, and second the population of the ground and the first excited state of Eu3+ as a function of temperature differs depending on the size: at low temperatures, the smaller the particles, the less populated the first excited state is. The explanation of this second phenomenon could be the absence of very low-energy phonons in small particles.

Domaines

Matériaux
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Dates et versions

hal-00436171 , version 1 (26-11-2009)

Identifiants

  • HAL Id : hal-00436171 , version 1

Citer

B. Mercier, C. Dujardin, G. Ledoux, Catherine Louis, Olivier Tillement, et al.. Confinement effects in sesquioxydes. Journal of Luminescence, 2006, pp.224-227. ⟨hal-00436171⟩
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