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Proceedings Paper

Sensitization of Eu3+ emission in SiO2 spheres doped with rare earth complex
Author(s): Changqing Huang; Ting Sun; Baoping Zhao; Weijian Tian
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Paper Abstract

Silica spheres doped with Eu(TTFA)3 and/or Sm(TTFA)3 are successfully synthesized by using the modified Stober method (the base-catalyzed method). Transmission electron microscope (TEM) shows that the hybrid particles have spherical morphology and an average diameter of about 210 nm. Energy dispersive spectroscopy (EDS) confirms that the rare-earth (RE) complexes are incorporated into the hybrid spheres. The particles consist of 4-fold siloxane rings as determined by Fourier transform infrared spectroscopy (FTIR). For the samples doped with Eu(TTFA)3 or Sm(TTFA)3, the typical fluorescence spectra of Eu3+ or Sm3+ emissions are detected, respectively. However, for the samples co-doped with Eu(TTFA)3 and Sm(TTFA)3, photoluminescence (PL) shows the absence of Sm3+ emission and reveals the obvious energy transfer from Sm3+ ions to Eu3+ ions. Note that there are energy transfer processes between the ligands and Eu3+ or Sm3+. Therefore, multiple energy transfer processes are achieved within the hybrid spheres. These energy transfer processes maximize the possible fluorescence emission of Eu3+ ion. The lifetimes of the hybrid spheres are also measured. The RE complex/SiO2 hybrid spheres described in this paper may find promising applications in optical devices and materials science.

Paper Details

Date Published: 10 June 2006
PDF: 7 pages
Proc. SPIE 6344, Advanced Laser Technologies 2005, 63442D (10 June 2006); doi: 10.1117/12.694425
Show Author Affiliations
Changqing Huang, Xi'an Institute of Optics and Precision Mechanics (China)
Chinese Academy of Sciences (China)
Ting Sun, Xi'an Institute of Optics and Precision Mechanics (China)
Chinese Academy of Sciences (China)
Baoping Zhao, Xi'an Institute of Optics and Precision Mechanics (China)
Chinese Academy of Sciences (China)
Weijian Tian, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 6344:
Advanced Laser Technologies 2005
Ivan A. Shcherbakov; Kexin Xu; Qingyue Wang; Alexander V. Priezzhev; Vladimir I. Pustovoy, Editor(s)

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