Sensitization of Eu<sup>3+</sup> emission in SiO<sub>2</sub> spheres doped with rare earth complex

Changqing Huang; Ting Sun; Baoping Zhao; Weijian Tian

doi:10.1117/12.694425

10 June 2006 Sensitization of Eu³⁺ emission in SiO₂ spheres doped with rare earth complex

Changqing Huang, Ting Sun, Baoping Zhao, Weijian Tian

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.

Citation Download Citation

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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