Disorder-dependent photoluminescence in Ba0.8Ca0.2TiO3 at room temperature
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Elsevier B.V.
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Article
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Abstract
The photoluminescence (PL) emission in structurally disordered Ba0.8Ca0.2TiO3 (BCT20) powders was observed at room temperature with laser excitation at lines 355 and 460 nm. The structural evolution perovskite-like titanate BCT20 powders prepared by a soft chemical processing at different annealing temperatures were accompanied by X-ray diffraction (XRD) and X-ray absorption near-edge structure (XANES). Intermediate oxycarbonate phase was identified and your influence with PL emission was discarding. BCT20 annealed at 500 degrees C displays intense PL emission. The results indicate relationship between broad PL band and order-disorder degree. (C) 2009 Elsevier B.V. All rights reserved.
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Keywords
Titanates, Amorphous semiconductors, Photoluminescence, Order-disorder, BCT
Language
English
Citation
Journal of Luminescence. Amsterdam: Elsevier B.V., v. 129, n. 7, p. 686-690, 2009.
