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Type: Artigo de periódico
Title: Tungsten oxide films of high electrochromic efficiencies obtained by deposition
Author: Scarminio, J
de Moraes, MAB
Dias, RCE
Rouxinol, FP
Durrant, SF
Abstract: Amorphous tungsten oxide films of high electrochromic efficiency were produced by a chemical vapor deposition technique in which the precursors of film formation are generated at the surface of a heated tungsten filament by reactions of tungsten with oxygen. The film deposition rate was determined as a function of the filament temperature and oxygen pressure. Molecular structure investigations using X-ray photoelectron spectroscopy revealed that the tungsten oxide was in the WO3 stoichiometry. The electrochromic properties of the films were studied for Li+ intercalation. Optical efficiencies as high as 78 and 125 cm(2)/C at 632.8 and 950 nm, respectively, and absorbance changes from 0.07 to 1.1 were measured between the bleached and the colored states at 632.8 nm. (C) 2003 The Electrochemical Society.
Country: EUA
Editor: Electrochemical Soc Inc
Citation: Electrochemical And Solid State Letters. Electrochemical Soc Inc, v. 6, n. 6, n. H9, n. H12, 2003.
Rights: aberto
Identifier DOI: 10.1149/1.1570632
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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