Strong Photoluminescence Through Up and Down Conversion in Tm3+/Ho3+:LaOF Nanoparticles

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Efficient up and down frequency conversions in Tm3+ and Ho3+ doped LaOF tetragonal nanocrystals have been investigated. Bright fluorescence emissions are obtained in co-doped Tm3+/Ho3+:LaOF tetragonal nanocrystals through UV and infrared excitation. Green florescence from doped Ho3+ ions, which can be clearly seen with bared eyes, is obtained when Tm3+ ion is excited. Specific mechanism of the cross relaxation between doped ions is explored through spectroscopic measurements in time and frequency domains. About 90% energy transfer efficiency is obtained when the weak radiative and nonradiative relaxations are neglected.


Document Type: Research Article


Publication date: November 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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