中国物理B ›› 2010, Vol. 19 ›› Issue (2): 27801-027801.doi: 10.1088/1674-1056/19/2/027801

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Doping effects of Nb5+ on red long afterglow phosphor CaTiO3:Pr3+

蒋自强, 王育华, 龚宇   

  1. Department of Materials Science, School of Physical Science and Technology,Lanzhou University, Lanzhou 730000, China
  • 收稿日期:2008-10-06 修回日期:2009-08-19 出版日期:2010-02-15 发布日期:2010-02-15

Doping effects of Nb5+ on red long afterglow phosphor CaTiO3:Pr3+

Jiang Zi-Qiang(蒋自强), Wang Yu-Hua(王育华), and Gong Yu(龚宇)   

  1. Department of Materials Science, School of Physical Science and Technology,Lanzhou University, Lanzhou 730000, China
  • Received:2008-10-06 Revised:2009-08-19 Online:2010-02-15 Published:2010-02-15

摘要: A series of Nb5+ codoped red long afterglow phosphors CaTi1-xNbxO3:Pr 0.0023+ (0 ≤ x ≤ 0.05) is prepared by a solid state reaction method. Their photoluminescence, phosphorescence and thermoluminescence are investigated. The results indicate that codoping Nb5+ can improve the photoluminescence and phosphorescence property of CaTiO3:Pr3+ significantly. When 3-mol% Nb5+ is codoped, the emission intensity of CaTiO3:Pr3+ is enhanced twice, while the afterglow time is extended from 10 min to about 40 min. Thermoluminescence results reveal that the trapping level of CaTiO3:Pr3+ is reduced from 0.82~eV to 0.62~eV by codoping Nb5+. The effect of Nb5+ doping on enhancing the photoluminescence intensity and afterglow time of CaTiO3:Pr3+ is discussed.

Abstract: A series of Nb5+ codoped red long afterglow phosphors CaTi1-xNbxO3:Pr 0.0023+ (0 ≤ x ≤ 0.05) is prepared by a solid state reaction method. Their photoluminescence, phosphorescence and thermoluminescence are investigated. The results indicate that codoping Nb5+ can improve the photoluminescence and phosphorescence property of CaTiO3:Pr3+ significantly. When 3-mol% Nb5+ is codoped, the emission intensity of CaTiO3:Pr3+ is enhanced twice, while the afterglow time is extended from 10 min to about 40 min. Thermoluminescence results reveal that the trapping level of CaTiO3:Pr3+ is reduced from 0.82 eV to 0.62 eV by codoping Nb5+. The effect of Nb5+ doping on enhancing the photoluminescence intensity and afterglow time of CaTiO3:Pr3+ is discussed.

Key words: CaTiO3:Pr3+, red afterglow, trap

中图分类号:  (Other solid inorganic materials)

  • 78.55.Hx
61.72.up (Other materials) 78.60.Kn (Thermoluminescence)