The Sensitization of Tb3+ Luminescence by Ce3+ in Lanthanum Silicophosphates

Abstract

Abstract: We studied the emission and excitation spectra of Tb³⁺-activated as and Ce³⁺ and Tb³⁺-coactivated ₂O₃·0.01 SiO₂·0.95 P₂O₅. Though the comparison between emission and excitation spectra, we have found that luminescence of Tb³⁺ is greatly sensitized and enhanced in the presence of Ce³⁺ .The effect of temperature on the luminescence of Tb³⁺- activated as well as Ce³⁺ and Tb³⁺ -coactivated phosphorus was studied.The energy transfer efficiency from Ce³⁺ to Tb³⁺ was calculated to be more than 95%. The mechanism of energy transfer from Ce³⁺ to Tb³⁺ has been shown to be a resonance process.The phosphorus shows different concentration quenching conditions under various types of excitation. The higher the excitation energy, the smaller the concentration at which the quenching starts to occur. The optimum concentration for Tb³⁺ emission under different excitations was determined.

Key words: Cerium, Terbium, Sensitization, Silicophosphate, Luminescence

TrendMD:

Huang Zhupo, Ma Guoling . The Sensitization of Tb³⁺ Luminescence by Ce³⁺ in Lanthanum Silicophosphates[J]. Chem. J. Chinese Universities, 1989, 10(6): 571.

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The Sensitization of Tb³⁺ Luminescence by Ce³⁺ in Lanthanum Silicophosphates

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