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Synthesis and luminescence properties of mesophase silica thin films doped with in-situ formed europium complex

Authors
Journal
Journal of Luminescence
0022-2313
Publisher
Elsevier
Publication Date
Volume
128
Issue
4
Identifiers
DOI: 10.1016/j.jlumin.2007.08.012
Keywords
  • Mesophase Thin Film
  • Rare Earth Complex
  • Photoluminescence
  • β-Diketone
  • Quantum Efficiency
Disciplines
  • Physics

Abstract

Abstract Mesophase silica thin film doped with in-situ formed ternary Eu complex was synthesized by adding ligands (DBM=dibenzoylmethane, phen=1,10-phenanthroline), Eu ions (EuCl 3·6H 2O), and Pluronic P123 triblock copolymer into hydrolyzed tetramethoxy-silane (TMOS). The structure of this inorganic/organic film was characterized as a 2d-hexagonal structure by X-ray diffraction (XRD) and TEM analysis. The excitation spectra ( λ em=612 nm) and emission spectra ( λ ex=325 nm) indicated that the ternary complex, Eu–DBM–phen, was formed in-situ during the formation of the film. The mesophase silica thin film doped with the in-situ formed Eu complex showed a higher quantum efficiency compared to a pure Eu(DBM) 3phen complex and a mesophase silica thin film doped with in-situ formed binary Eu–phen complex.

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