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Article Dans Une Revue Journal of Alloys and Compounds Année : 2012

Nanocrystallization and photoluminescence of Ce/Dy/Eu-doped fluorosilicate glass ceramics

Résumé

Ce3+-Eu2+-Dy3+-Eu3+-doped fluorosilicate glass ceramics containing orthorhombic CaCeOF3 nanocrystals were prepared by annealing the precursor glass above 640 °C, along with the reduction of Eu3+ → Eu2+. Under near ultraviolet excitation, the emission bands of Eu2+ or Dy3+ were enhanced by several ten or hundred times, owing to energy transfers from Ce3+ to Eu2+ or Dy3+. The glass and glass ceramics emitted warm white light deriving from the blue, yellow and red emission from Eu2+, Dy3+ and Eu3+. Tuning the annealing temperature, the Eu2+/Eu3+ ratio and the warm white Commission Internationale de I'Eclairage (CIE) coordinates can be adjusted. Thus, the present materials can be applied on warm white high power light-emitting-diodes for indoor illumination application.

Domaines

Matériaux

Dates et versions

hal-00848934 , version 1 (29-07-2013)

Identifiants

Citer

Xianping Fan, Xvsheng Qiao, Daliang Zhao, Qun Luo, Xianghua Zhang. Nanocrystallization and photoluminescence of Ce/Dy/Eu-doped fluorosilicate glass ceramics. Journal of Alloys and Compounds, 2012, 511 (1), pp.232-236. ⟨10.1016/j.jallcom.2011.09.042⟩. ⟨hal-00848934⟩
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