Artigo
Influence of the network modifier on the characteristics of MSnO3 (M=Sr and,Ca) thin films synthesized by chemical solution deposition
Registro en:
Journal Of Solid State Chemistry. San Diego: Academic Press Inc Elsevier Science, v. 199, p. 34-41, 2013.
0022-4596
10.1016/jjssc.2012.11.014
WOS:000315477500006
Autor
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.
Resumen
CaSnO3 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. French-Brazilian doctoral college Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) PROINFRA/FINEP/MCT Univ Rennes 1, CNRS, UMR 6226, Inst Sci Chim Rennes, F-35042 Rennes, France Univ Fed Paraiba, Dept Quim, LACOM INCTMN, BR-58059900 Joao Pessoa, Paraiba, Brazil Univ Sao Paulo, IFSC, BR-13560970 Sao Carlos, SP, Brazil Univ Estadual Paulista, Inst Quim, LIEC INCTMN, BR-14801907 Araraquara, SP, Brazil Univ Brasilia, Inst Quim, LMC, BR-70910900 Brasilia, DF, Brazil Univ Estadual Paulista, Inst Quim, LIEC INCTMN, BR-14801907 Araraquara, SP, Brazil CAPES: 644/09