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http://acervodigital.unesp.br/handle/11449/40406- Title:
- Disorder-dependent photoluminescence in Ba0.8Ca0.2TiO3 at room temperature
- Universidade Estadual Paulista (UNESP)
- Universidade de São Paulo (USP)
- Instituto de Pesquisas Energéticas e Nucleares (IPEN)
- 0022-2313
- Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
- 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.
- 1-Jul-2009
- Journal of Luminescence. Amsterdam: Elsevier B.V., v. 129, n. 7, p. 686-690, 2009.
- 686-690
- Elsevier B.V.
- Titanates
- Amorphous semiconductors
- Photoluminescence
- Order-disorder
- BCT
- http://dx.doi.org/10.1016/j.jlumin.2009.01.014
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/40406
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