Article Dans Une Revue Journal of Solid State Chemistry Année : 2005

Preparing nanometer scaled Tb-doped Y2O3 luminescent powders by the polyol method

Résumé

Sub-micrometer Tb-doped Y2O3 luminescent powders were prepared from nitrate precursors using the polyol method. Just after precipitation, the powders consist of agglomerates with a spherical shape and a size ranging between 400 and 500 nm. Each agglomerate is composed of ultra-small crystallites (from 3 to 6 nm) of a bcc oxide phase whose luminescence presents original features in comparison with bulk materials. Powders were further calcinated at different temperatures and for annealing below 900 °C, highly crystalline samples with the classical green 5D4→7F5 luminescent transitions of Tb3+ ions are obtained. For optimized annealing temperatures, sintering between the agglomerates is avoided and a sub-micrometric powder with a narrow size distribution and a high luminescence is obtained.

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Dates et versions

hal-00436803 , version 1 (27-11-2009)

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Citer

Marco Antonio Flores-González, Gilles Ledoux, Stéphane G. Roux, Kheirreddine Lebbou, Pascal Perriat, et al.. Preparing nanometer scaled Tb-doped Y2O3 luminescent powders by the polyol method. Journal of Solid State Chemistry, 2005, pp.989-997. ⟨10.1016/j.jssc.2004.10.029⟩. ⟨hal-00436803⟩
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