The role of oxygen vacancy in the photoluminescence property at room temperature of the CaTiO3
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Data
2009-08-15
Autores
Milanez, Juliana
de Figueiredo, Alberthmeiry T. [UNESP]
de Lazaro, Sergio
Longo, Valeria M. [UNESP]
Erlo, Rafael
Mastelaro, Valmor R.
Franco, Roberto W. A.
Longo, Elson [UNESP]
Varela, José Arana [UNESP]
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American Institute of Physics (AIP)
Resumo
In this paper, electron paramagnetic resonance, photoluminescence (PL) emission, and quantum mechanical calculations were used to observe and understand the structural order-disorder of CaTiO3, paying special attention to the role of oxygen vacancy. The PL phenomenon at room temperature of CaTiO3 is directly influenced by the presence of oxygen vacancies that yield structural order-disorder. These oxygen vacancies bonded at Ti and/or Ca induce new electronic states inside the band gap. Ordered and disordered CaTiO3 was obtained by the polymeric precursor method. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3190524]
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Journal of Applied Physics. Melville: Amer Inst Physics, v. 106, n. 4, p. 7, 2009.