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Cooperative energy transfer in Gd2(MoO4)3:Tb,Yb nanophosphors

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5 Author(s)
Liang, X.F. ; Inst. of Opt. Commun. Mater., South China Univ. of Technol., Guangzhou ; Zhang, Q.Y. ; Chen, D.D. ; Ji, X.H.
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In this paper, we report an efficient cooperative energy transfer in Gd2(MoO4)3:Tb3+,Yb3+ nanophosphors. Powder samples of Gd2(MoO4)3:Tb3+,Yb3+ were prepared by means of combustion synthesis. The products were analyzed by means of X-ray diffraction, scanning electron microscopy and fluorescence spectrometer. The dependence of Yb3+ concentration on the visible- and NIR-emission, decay lifetime and quantum efficiency from the Gd2(MoO4)3:Tb3+,Yb3+ phosphors have been investigated. The optimal quantum efficiency has been found to be 185%. Our results show that in principle an efficiency luminescent converter that, in an ideal case, converts visible photons into two or more NIR photons.

Published in:

Nanoelectronics Conference, 2008. INEC 2008. 2nd IEEE International

Date of Conference:

24-27 March 2008