This paper studies photo-,cathodo-and X-ray luminescence of Ce^(3+) and Dy^(3+)mono-doped LABO_3 samples or Ce^(3+),Dy^(3+) codoped LaBO_3 samples and the dependence of Ce^(3+) and Dy^(3+) luminescent intensi- ties on...This paper studies photo-,cathodo-and X-ray luminescence of Ce^(3+) and Dy^(3+)mono-doped LABO_3 samples or Ce^(3+),Dy^(3+) codoped LaBO_3 samples and the dependence of Ce^(3+) and Dy^(3+) luminescent intensi- ties on compositions.The results obtained indicate that Ce^(3+) can sensitize well the luminescence of Dy^(3+) un- der UV excitation and quench markedly it under CR and XR excitation.This paper also studies the concen- tration dependence of emission intensity of Dy^(3+) under the excitation of peak wavelength of 352 nm,con- firming that the mechanism of concentration self-quenching of Dy^(3+) is a dipole-dipole interaction and the mechanism of the energy transfer from Ce^(3+) to Dy^(3+) is a resonant transfer in which electric multipole interaction plays a leading role.展开更多
文摘This paper studies photo-,cathodo-and X-ray luminescence of Ce^(3+) and Dy^(3+)mono-doped LABO_3 samples or Ce^(3+),Dy^(3+) codoped LaBO_3 samples and the dependence of Ce^(3+) and Dy^(3+) luminescent intensi- ties on compositions.The results obtained indicate that Ce^(3+) can sensitize well the luminescence of Dy^(3+) un- der UV excitation and quench markedly it under CR and XR excitation.This paper also studies the concen- tration dependence of emission intensity of Dy^(3+) under the excitation of peak wavelength of 352 nm,con- firming that the mechanism of concentration self-quenching of Dy^(3+) is a dipole-dipole interaction and the mechanism of the energy transfer from Ce^(3+) to Dy^(3+) is a resonant transfer in which electric multipole interaction plays a leading role.
