Journal of Guangdong University of Technology ›› 2010, Vol. 27 ›› Issue (1): 20-24.

• Comprehensive Studies • Previous Articles     Next Articles

Synthesis of Sr2-M gx Si2 O7：Eu ，Dy’ and Their Luminescent Properties

  

  1. Facudy of Physics and Optoelectronic Engineering，Guangdong University of Technology，Guangzhou 510006，China
  • Online:2010-03-25 Published:2010-03-25

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Abstract: The long afterglow luminescent materials Sr2一Mg Si2O7：Eu“，Dy¨( =1．4，1．2，1，0．8，0．6)were synthesized by high temperature solid-state reaction．According to the X—ray diffraction analysis，it was found that the phase of the materials was Sr2MgSi2O7 when the ≥ 1．Three phases have been found when the <1．When ≥1，with the decrease of ，the blHe shift of the emission peak appears through the ph0toluminescence．The depths of the traps were analyzed through the afterglow CHIVES and the thermolumineseence spectra．With the decrease of ，the decay time of the samples decreases，and the traps of the phosphors become shallow．

Key words: long afterglow；silicate；rare earth；trap

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