Alves, M. C. F.Marinho, R. M. M.Casali, G. P.Siu-Li, M.Deputier, S.Guilloux-Viry, M.Souza, A. G.Longo, E. [UNESP]Weber, I. T.Santos, I. M. G.Bouquet, V.2014-12-032014-12-032013-03-01Journal Of Solid State Chemistry. San Diego: Academic Press Inc Elsevier Science, v. 199, p. 34-41, 2013.0022-4596http://hdl.handle.net/11449/111396CaSnO3 and SrSnO3 alkaline earth stannate thin films were prepared by chemical solution deposition using the polymeric precursor method on various single crystal substrates (R- and C-sapphire and 100-SrTiO3) at different temperatures. The films were characterized by X-ray diffraction (theta-2 theta, omega- and (phi-scans), field emission scanning electron microscopy, atomic force microscopy, micro-Raman spectroscopy and photoluminescence. Epitaxial SrSnO3 and CaSnO3 thin films were obtained on SrTiO3 with a high crystalline quality. The long-range symmetry promoted a short-range disorder which led to photoluminescence in the epitaxial films. In contrast, the films deposited on sapphire exhibited a random polycrystalline growth with no meaningful emission regardless of the substrate orientation. The network modifier (Ca or Sr) and the substrate (sapphire or SrTiO3) influenced the crystallization process and/or the microstructure. Higher is the tilts of the SnO6 octahedra, as in CaSnO3, higher is the crystallization temperature, which changed also the nucleation/grain growth process. (C) 2012 Elsevier Inc. All rights reserved.34-41engPerovskiteStannatesChemical solution depositionPolymeric precursor methodEpitaxial growthPhotoluminescenceArtigo10.1016/jjssc.2012.11.014WOS:000315477500006Acesso restrito