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.
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.
