Structural and photoluminescent properties of EuF₃ nanoparticles in zeolite A

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• 作者：M. Flores-Acosta ; R. Pé ; rez-Salas ; R. Aceves ; M. Sotelo-Lerma and R. Ramí ; rez-Bon
• 关键词：A. Nanostructures ; B. Chemical synthesis ; C. Scanning and transmission electron microscopy ; D. Optical properties ; E. Luminescence
• 刊名：Solid State Communications
• 出版年：2005
• 出版时间：December 2005
• 年：2005
• 卷：136
• 期：11-12
• 页码：567-571
• 全文大小：161 K

文摘

We report the structural and photoluminescence studies on EuF₃-doped zeolite A samples, which were prepared by a diffusion method from liquid to solid state phase. The samples were studied by transmission electron microscopy and by room and low temperature photoluminescence measurements. The microstructural analysis shows that EuF₃ crystalline nanoparticles were formed inside the zeolites matrix. The photo-luminescence properties of the EuF₃ enclosed in the zeolites show some remarkable differences with those of isolated EuF₃ powder. The emission spectra of EuF₃-doped zeolite A show a dependence on the excitation wavelength, which was related to excitonic size effects. It was observed emission of the Eu³⁺-ion excited at a wavelength not corresponding to any excitation line in the excitation spectrum of the Eu³⁺-ion, as consequence of an energy transfer mechanism. The emission of Eu³⁺ ions resulting from this energy transfer process indicates that Eu³⁺-ions have a different symmetry.