Publicação: Intense visible photoluminescence in Ba(Zr0.25Ti0.75)O-3 thin films
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2007-01-01
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American Institute of Physics (AIP)
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Photoluminescence at room temperature in Ba(Zr0.25Ti0.75)O-3 thin films was explained by the degree of structural order-disorder. Ultraviolet-visible absorption spectroscopy, photoluminescence, and first principles quantum mechanical measurements were performed. The film annealed at 400 degrees C for 4 h presents intense visible photoluminescence behavior at room temperature. The increase of temperature and annealing time creates [ZrO6]-[TiO6] clusters in the lattice leading to the trapping of electrons and holes. Thus, [ZrO5]-[TiO6]/[ZrO6]-[TiO6] clusters were the main reason for the photoluminescence behavior.
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Applied Physics Letters. Melville: Amer Inst Physics, v. 90, n. 1, 3 p., 2007.
