Photoluminescence at room temperature in disordered Ba(0.50)Sr(0.)5(0)(Ti0.80Sn0.20)O-3 thin films
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Data
2006-05-22
Autores
Souza, I. A.
Simoes, A. Z.
Longo, Elson [UNESP]
Varela, José Arana [UNESP]
Pizani, P. S.
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American Institute of Physics (AIP)
Resumo
Photoluminescence (PL) properties at room temperature of disordered Ba0.50Sr0.50(Ti0.80Sn0.20)O-3 (BST:Sn) thin films were obtained by the polymeric precursor method. X-ray diffraction data and corresponding PL properties have been measured using the 488 nm line of an argon ion laser. The PL spectra of the film annealed at 350 degrees C for 21 h are stronger than those of the film annealed at 350 degrees C for 28 h, indicating a disorganized structure. The energy band gaps of the crystalline and amorphous BST:Sn thin films were 3.35 and 2.25 eV, respectively. The doped BST thin films also tend to a cubic structure, resulting from TiO6 deformations. (c) 2006 American Institute of Physics.
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Applied Physics Letters. Melville: Amer Inst Physics, v. 88, n. 21, 3 p., 2006.