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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 |
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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.
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Received: 06 October 2008
Revised: 19 August 2009
Accepted manuscript online:
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PACS:
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78.55.Hx
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(Other solid inorganic materials)
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61.72.up
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(Other materials)
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78.60.Kn
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(Thermoluminescence)
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Cite this article:
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+ 2010 Chin. Phys. B 19 027801
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