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Preparation and long-afterglow luminescence research of Sr0.6Ba0.2Ca0.2Al2O4 ∶Eu, Dy

Zhang Jun Zou Chang-Wei Li Da Shao Le-Xi Wang Yin-Hai Hu Yi-Hua Xie Wei

Preparation and long-afterglow luminescence research of Sr0.6Ba0.2Ca0.2Al2O4 ∶Eu, Dy

Zhang Jun, Zou Chang-Wei, Li Da, Shao Le-Xi, Wang Yin-Hai, Hu Yi-Hua, Xie Wei
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  • Received Date:  23 August 2010
  • Accepted Date:  21 September 2010
  • Published Online:  15 June 2011

Preparation and long-afterglow luminescence research of Sr0.6Ba0.2Ca0.2Al2O4 ∶Eu, Dy

  • 1. (1)Development Center for New Materials Engineering and Technology in Univesities of Guangdong Province, Zhanjiang 524048, China; (2)School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China; (3)School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China; Development Center for New Materials Engineering and Technology in Univesities of Guangdong Province, Zhanjiang 524048, China; Research Center o

Abstract: The Ca and Ba co-doped long afterglow phosphors Sr0.6Ba0.2Ca0.2Al2O4 ∶Eu2+0.01, Dy3+0.02 and only Ba doped phosphors Sr0.6Ba0.4Al2O4 ∶Eu2+0.01, Dy3+0.02 are synthesized by a high temperature solid-state reaction method. The phase structures of the phosphors are characterized by x-ray diffraction, showing that the crystal structures of samples are hexagonal. Photoluminescence spectra show that Eu2+ ion acts as the only luminescence center in sample,and Sr0.6Ba0.2Ca0.2Al2O4 ∶Eu2+, Dy3+ display higher luminescent intensities due to the higher concentration of Eu2+ ions in the host crystal lattice. The decay characteristics of phosphors show that Sr0.6Ba0.2Ca0.2Al2O4 ∶Eu2+, Dy3+exhibit higher intensities in the initial afterglow process and longer afterglow time. The measurement of thermoluminescence reveals that the concentrations and depth of traps can be increased by Ca and Ba co-doping in Sr0.6Ba0.4Al2O4 ∶Eu2+, Dy3+ phosphor.

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