Sczancoski, J. C.Cavalcante, L. S. [UNESP]Badapanda, T.Rout, S. K.Panigrahi, S.Mastelaro, V. R.Varela, José Arana [UNESP]Li, M. SiuLongo, Elson [UNESP]2014-05-202014-05-202010-07-01Solid State Sciences. Amsterdam: Elsevier B.V., v. 12, n. 7, p. 1160-1167, 2010.1293-2558http://hdl.handle.net/11449/41132[Ba1-xY2x/3](Zr0.25Ti0.75)O-3 powders with different yttrium concentrations (x = 0, 0.025 and 0.05) were prepared by solid state reaction. These powders were analyzed by X-ray diffraction (XRD). Fourier transform Raman scattering (FT-RS), Fourier transform infrared (FT-IR) and X-ray absorption near-edge (XANES) spectroscopies. The optical properties were investigated by means of ultraviolet-visible (UV-vis) absorption spectroscopy and photoluminescence (PL) measurements. Even with the addition of yttrium, the XRD patterns revealed that all powders crystallize in a perovskite-type cubic structure. FT-RS and FT-IR spectra indicated that the presence of [YO6] clusters is able to change the interaction forces between the O-Ti-O and O-Zr-O bonds. XANES spectra were used to obtain information on the off-center Ti displacements or distortion effects on the [TiO6] clusters. The different optical band gap values estimated from UV-vis spectra suggested the existence of intermediary energy levels (shallow or deep holes) within the band gap. The PL measurements carried out with a 350 nm wavelength at room temperature showed that all powders present typical broad band emissions in the blue region. (C) 2010 Elsevier Masson SAS. All rights reserved.1160-1167engBa(Zr,Ti)O-3VacanciesLattice defectsBand gapPhotoluminescenceArtigo10.1016/j.solidstatesciences.2010.04.002WOS:000280381200021Acesso restrito