Title :
Cooperative energy transfer in Gd2(MoO4)3:Tb,Yb nanophosphors
Author :
Liang, X.F. ; Zhang, Q.Y. ; Chen, D.D. ; Ji, X.H. ; Zhai, J.W.
Author_Institution :
Inst. of Opt. Commun. Mater., South China Univ. of Technol., Guangzhou
Abstract :
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.
Keywords :
X-ray diffraction; combustion synthesis; fluorescence; gadolinium compounds; nanostructured materials; nanotechnology; phosphors; photoluminescence; powders; scanning electron microscopy; terbium; ytterbium; Gd2(MoO4)3:Tb3+,Yb3+; NIR photons; X-ray diffraction; combustion synthesis; energy transfer; fluorescence spectrometer; luminescence; nanophosphors; near infrared emission spectra; powder samples; quantum efficiency; scanning electron microscopy; visible photons; Energy exchange; Nanoelectronics;
Conference_Titel :
Nanoelectronics Conference, 2008. INEC 2008. 2nd IEEE International
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1572-4
Electronic_ISBN :
978-1-4244-1573-1
DOI :
10.1109/INEC.2008.4585447
