Articles
  • Study of co-excited green emission of Tb3+, Ce3+ and Gd3+ in yttrium aluminum garnet
  • Fei Huanga, Limin Dongb, Zhengyi Fua,*, Hao Wanga, Weimin Wanga and Yucheng Wanga
  • a State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P.R.China b School of Material Science & Engineering, Harbin University of Science and Technology, Harbin 150040, P.R.China
Abstract
YAG : Tb3+, Ce3+, Gd3+ nano-phosphors derived from a sol-gel chemistry have been successfully synthesized and characterized by TG/DTA, XRD, SEM, and spectrometer. The results show that the phosphors have a uniform particle size distribution ranging 30-50 nm. The value of the lattice constant increased with an increase of the Gd3+ content. Tb3+ →Ce3+, Ce3+ →Tb3+ and Gd3+ →Ce3+ energy transfer existed in the co-excited system. The luminescence intensity was controlled by the concentration and ratio of the co-dopants. A small quantity of Gd3+ and Ce3+ evidently increased the green emission (5D4→ 7F5) of Tb3+.

Keywords: Sol-gel, YAG, nano-phosphor, energy transfer.

This Article

  • 2009; 10(6): 807-810

    Published on Dec 31, 2009

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