Luminescence and energy transfer properties of Eu³⁺ and Gd³⁺ in ZrO₂

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• 作者：E.G. Villabona-Leal ; L.A. Diaz-Torres ; H. Desirena ; J.L. Rodr铆guez-L贸pez ; El铆as P茅rez ; Octavio Meza
• 关键词：Luminescencen ; Energy transfer ; Fluorescence dynamics
• 刊名：Journal of Luminescence
• 出版年：February, 2014
• 年：2014
• 卷：146
• 期：Complete
• 页码：398-403
• 全文大小：929 K

文摘

Red luminescence emission in ZrO2:Gd³⁺-Eu³⁺ nanocrystal under 250 nm radiation excitation is achieved. These materials exhibit a tetragonal phase that is retained by the presence of lanthanide ions. Thus, a study of the optical properties as a function of the dopant concentration was been carried out without the deleterious effects of having segregation of other crystalline phases. We analyze the emission and lifetime curves as a function of dopant concentration through a rate equation simulation, finding an excellent fitting. As results, the nonradiative and radiative relaxation constants, as well as a quantitative estimation of the energy transfer processes among Eu³⁺, Gd³⁺ and O^{2鈭?/sup> ions are reported for the first time. The proposed model can be extended (or applicable) to explain the fluorescence dynamics in other nanomaterials doped with Eu3+ and Gd3+ under UV excitation.}