Preparation and characterization of pyrolytic spray deposited electrochromic tungsten trioxide films

被引:132
作者
Regragui, M [1 ]
Addou, M
Outzourhit, A
Bernéde, JC
Idrissi, EE
Benseddik, E
Kachouane, A
机构
[1] Fac Sci, Dept Phys, Lab Optoelect & Physciochim Mat, Kenitra, Mexico
[2] Fac Sci Semlalia, Lab Phys Solide & Couches Minces, Marrakech, Morocco
[3] Univ Nantes, Equipe Phys Solides Elect, Grp Couches Minces & Mat Nouveaux, FSTN, F-44322 Nantes 3, France
关键词
spray pyrolysis; optical coatings; optical properties; X-ray photoelectron spectroscopy (XPS);
D O I
10.1016/S0040-6090(99)00682-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Tungsten trioxide (WO3) thin films were prepared by spray pyrolysis under various conditions using, for the first time, tungsten chloride (WCl6) dissolved in 50% ethanol-50% wafer. All the as-deposited films were amorphous and dark. When annealed, they became crystallized and transparent. The structure and the composition of these films, before and after annealing, were studied. The X-ray diffraction diagrams revealed that all the annealed films consisted of the monoclinic WO3 phase. The X-ray photoelectron spectroscopy studies of the VV,, doublet showed the W6+ oxidation state: for all the films. The electron probe microanalysis revealed an over, stoichiometry of oxygen for the unannealed films. The optical properties as well as the structure of the annealed, therefore transparent, films prepared at different spray rates were also determined. The optical gap was determined from reflection and transmission spectra, All annealed samples exhibited a reversible electrochromic effect in the presence of an acid electrolyte as demonstrated by cyclic voltammetry and optical transmission measurements. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:40 / 45
页数:6
相关论文
共 29 条
  • [1] AGNIHOTRY SA, 1986, INDIAN J PURE AP PHY, V24, P19
  • [2] ELECTROCHROMISM IN NIOX AND WOX OBTAINED BY SPRAY-PYROLYSIS
    ARAKAKI, J
    REYES, R
    HORN, M
    ESTRADA, W
    [J]. SOLAR ENERGY MATERIALS AND SOLAR CELLS, 1995, 37 (01) : 33 - 41
  • [3] OPTIMIZATION OF THE TECHNIQUE OF SYNTHESIS OF WSE2 THIN-FILMS BY SOLID-STATE REACTION BETWEEN W AND SE THIN-FILMS
    BENHIDA, S
    BERNEDE, JC
    POUZET, J
    BARREAU, A
    [J]. THIN SOLID FILMS, 1993, 224 (01) : 39 - 45
  • [4] STRUCTURAL CHARACTERIZATION OF SYNTHESIZED MOLYBDENUM DITELLURIDE THIN-FILMS
    BERNEDE, JC
    POUZET, J
    MANAI, N
    BENMOUAIS, A
    [J]. MATERIALS RESEARCH BULLETIN, 1990, 25 (01) : 31 - 42
  • [5] Depth profiling of W, O and H in tungsten trioxide thin films using RBS and ERDA techniques
    Bohnke, O
    Frand, G
    Fromm, M
    Weber, J
    Greim, O
    [J]. APPLIED SURFACE SCIENCE, 1996, 93 (01) : 45 - 52
  • [6] CHANG JF, 1976, NONEMISSIVE ELECTROO
  • [7] ELECTROCHROMISM OF COLLOIDAL TUNGSTEN-OXIDE
    CHEMSEDDINE, A
    MORINEAU, R
    LIVAGE, J
    [J]. SOLID STATE IONICS, 1983, 9-10 (DEC) : 357 - 361
  • [8] INFRARED AND RAMAN-STUDY OF WO3 TUNGSTEN TRIOXIDES AND WO3, XH2O TUNGSTEN TRIOXIDE HYDRATES
    DANIEL, MF
    DESBAT, B
    LASSEGUES, JC
    GERAND, B
    FIGLARZ, M
    [J]. JOURNAL OF SOLID STATE CHEMISTRY, 1987, 67 (02) : 235 - 247
  • [9] STUDY OF OPTICAL-PROPERTIES AND STRUCTURE OF WO3 ELECTROCHROMIC THIN-FILMS PREPARED BY CVD
    DAVAZOGLOU, D
    DONNADIEU, A
    FOURCADE, R
    HUGOTLEGOFF, A
    DELICHERE, P
    PEREZ, A
    [J]. REVUE DE PHYSIQUE APPLIQUEE, 1988, 23 (03): : 265 - 272
  • [10] DAVAZOGLOU D, 1987, THESIS U SCI TECHNIQ