Synthesis and Luminescence Properties of YF3:Ce3+/Tb3+ Nanocrystals
YF3:Ce3+, YF3:Tb3+, and YF3:Ce3+/Tb3+ nanocrystals were synthesized by an ethylenediaminetetraacetic acid (EDTA)-assisted hydrothermal method and characterized by X-ray diffraction and scanning electron microscope. In the excitation spectra, there is one broad excitation band at 285 nm for YF3:Ce3+ and 255 nm for YF3:Tb3+, which are related to the f–d excitations of the Ce3+ and Tb3+ in the host, respectively. In the emission spectra of YF3:Ce3+/Tb3+ nanocrystals under different excitation wavelengths (285 and 255 nm), both spectra exhibit the emissions of Ce3+ and Tb3+, indicating that energy transfer could take place not only from Ce3+ to Tb3+ but also from Tb3+ to Ce3+ ions.
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Document Type: Research Article
Publication date: 2010-03-01
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