LUMINESCENCE AND ENERGY TRANSFER OF Ce~(3+) AND Dy~(3+) IN LaBO_3

• 作 者: 彭夷安 郭凤瑜
• 机 构: Hunan Health Staff Medical College Changsha 410006,P.R.China,Department of Chemistry,Peking Universi
• 出 处: Journal of the Chinese Rare Earth Society(English Edition)
• 发表日期: 1990年02期
• 关键词: excitation luminescence luminescent dipole resonant ultraviolet quenching marked

This paper studies photo-,cathodo-and X-ray luminescence of Ce~(3+) and Dy~(3+)mono-doped LABO_3samples 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 themechanism of the energy transfer from Ce~(3+) to Dy~(3+) is a resonant transfer in which electric multipoleinteraction plays a leading role.

This paper studies photo-, cathodo-and X-ray luminescence of Ce ~ (3+) and Dy ~ (3+) mono-doped LABO_3samples or Ce ~ (3+), Dy ~ (3+) codoped LaBO_3 samples and the dependence of Ce ~ (3+) and Dy ~ (3+) luminescent intensi-ties on composites.The results of determination that 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 themechanism of the energy transfer from Ce ~ (3+) to Dy ~ (3+) is a resonant transfer in which electric multipole interaction plays a leading role.