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10 June 2006 Sensitization of Eu3+ emission in SiO2 spheres doped with rare earth complex
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Proceedings Volume 6344, Advanced Laser Technologies 2005; 63442D (2006) https://doi.org/10.1117/12.694425
Event: Advanced Laser Technologies 2005, 2005, Tianjin, China
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.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Changqing Huang, Ting Sun, Baoping Zhao, and Weijian Tian "Sensitization of Eu3+ emission in SiO2 spheres doped with rare earth complex", Proc. SPIE 6344, Advanced Laser Technologies 2005, 63442D (10 June 2006); https://doi.org/10.1117/12.694425
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