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

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

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.

Keywords: CaTiO₃:Pr³⁺ red afterglow trap

Received: 06 October 2008
Revised: 19 August 2009
Accepted manuscript online:

PACS:	78.55.Hx	(Other solid inorganic materials)
	61.72.up	(Other materials)
	78.60.Kn	(Thermoluminescence)

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

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