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Title: Photoluminescence of transparent strontium–barium–niobate-doped silica nanocomposites
Authors: Lu, S. G.
Mak, Chee-leung
Wong, Kin-hung
Cheah, K. W.
Subjects: Strontium compounds
Barium compounds
Ferroelectric materials
Nanostructured materials
Composite materials
Sol-gel processing
X-ray diffraction
Spectral line shift
Issue Date: 24-Dec-2001
Publisher: American Institute of Physics
Source: Applied physics letters, 24 Dec, 2001, v. 79, no. 26, p. 4310-4312.
Abstract: Optically transparent nanocomposites of strontium–barium–niobate (SBN) and silica were fabricated via a novel sol–gel method. The nanocomposites were annealed in temperatures of 600–800 °C to yield the nanometer-sized tetragonal tungsten–bronze phase of SBN crystallites. Photoluminescence studies at temperatures from 10 K to room temperature were performed. The undoped silica matrix showed a strong emission band at 3.2 eV and a weak emission band at 2.65 eV. They were noticeably suppressed in our SBN/SiO₂ nanocomposites. Extra sharp peaks on top of the 3.2 eV band were seen. An additional emission band at 2.3 eV due to transitions within the NbO₆ complex of SBN crystallites was also observed. This emission band showed a large blueshift with decreasing SBN crystallite size. This demonstrates that the photoluminescence spectra of ferroelectric-doped silica nanocomposites have a strong dependence on crystallite size.
Rights: © 2001 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in S. G. Lu et al., Appl. Phys. Lett. 79, 4310 (2001) and may be found at
Type: Journal/Magazine Article
DOI: 10.1063/1.1427419
ISSN: 0003-6951 (print)
1077-3118 (online)
Appears in Collections:MRC Journal/Magazine Articles
AP Journal/Magazine Articles

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