Intense visible photoluminescence in Ba(Zr0.25Ti0.75)O3 thin films

Photoluminescence at room temperature in Ba(Zr0.25Ti0.75)O3 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°C for 4h pres...

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Published in:Applied physics letters 2007-01, Vol.90 (1)
Main Authors: Cavalcante, L. S., Gurgel, M. F. C., Simões, A. Z., Longo, E., Varela, J. A., Joya, M. R., Pizani, P. S.
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container_title Applied physics letters
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creator Cavalcante, L. S.
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description Photoluminescence at room temperature in Ba(Zr0.25Ti0.75)O3 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°C for 4h 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.
doi_str_mv 10.1063/1.2425013
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title Intense visible photoluminescence in Ba(Zr0.25Ti0.75)O3 thin films
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