Luminescence and energy transfer of Ce^3+, Gd^3+ and Dy^3+ in BaGdB~9O~16

Abstract

The photoluminescence of Dy3+ singly doped BaGdB9O16 samples or Ce3+ and Dy3+ co-doped BaGdB9O16 samples excited by UV light and the dependence of Ce3+ and Dy3+ luminescent intensities on these compns. were studied. The results indicate that both Ce3+ and Gd3+ can sensitize the luminescence of Dy3+; the energy of Dy3+ emission originated mostly from the Ce3+ ion, which absorbs the excitation energy by its f-d transition. The other parts of the energy are derived from the Gd3+ ion. The mechanism of the energy transfer from Ce3+ to Dy3+ was studied. There is a resonant transfer elec. dipole-dipole interaction. The dependence is discussed of the luminescent intensities on the concentration of Dy3+ in BaGdB9O16:Dy3+ under the excitation at 348 nm. The mechanism of concentration self-quenching of Dy3+ is an elec. dipole-quadrupole interaction.

Key words: BORATES, BARIUM COMPOUND, DOPE, ENERGY TRANSFER, DYSPROSIUM, CADMIUM COMPOUNDS, QUENCHING, UV-LIGHT

CLC Number:

O644

Cite this article

HUANG XIAOHUA;GUO FENGYU. Luminescence and energy transfer of Ce^3+, Gd^3+ and Dy^3+ in BaGdB~9O~16[J]. Acta Chimica Sinica, 1993, 51(11): 1088-1093.

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BaGdB~9O~16中Dy^3+的发光和Ce^3+, Gd^3+驿Dy^3+的能量传递