Strong Photoluminescence Through Up and Down Conversion in Tm3+/Ho3+:LaOF Nanoparticles
Authors: Gao, Dangli; Zheng, Hairong; Tian, Yu; Cui, Min; Lei, Yu; He, Enjie; Zhang, Xisheng
Source: Journal of Nanoscience and Nanotechnology, Volume 10, Number 11, November 2010 , pp. 7694-7697(4)
Publisher: American Scientific Publishers
Abstract: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 2010
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