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

doi:10.1088/1674-1056/19/2/027801

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

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

蒋自强, 王育华, 龚宇

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)

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/Abstract

摘要： A series of Nb⁵⁺ codoped red long afterglow phosphors CaTi_1-xNb_xO₃: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 CaTi_1-xNb_xO₃: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)

蒋自强, 王育华, 龚宇. Doping effects of Nb⁵⁺ on red long afterglow phosphor CaTiO₃:Pr³⁺[J]. 中国物理B, 2010, 19(2): 27801-027801.

Jiang Zi-Qiang(蒋自强), Wang Yu-Hua(王育华), and Gong Yu(龚宇). Doping effects of Nb⁵⁺ on red long afterglow phosphor CaTiO₃:Pr³⁺[J]. Chin. Phys. B, 2010, 19(2): 27801-027801.

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

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

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