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      A complementary electrochromic device with highly improved performance based on brick-like hydrated tungsten trioxide film

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      Author(s)
      Jiao, Z.
      Wang, J.
      Ke, L.
      Sun, X. W.
      Demir, Hilmi Volkan
      Date
      2012
      Source Title
      Journal of Nanoscience and Nanotechnology
      Print ISSN
      1533-4880
      Publisher
      American Scientific Publishers
      Volume
      12
      Issue
      5
      Pages
      3838 - 3847
      Language
      English
      Type
      Article
      Item Usage Stats
      179
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      176
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      Abstract
      Uniform and well adhesive nanostructured hydrated tungsten trioxide (3WO 3•H 2O) films were grown on fluorine doped tin oxide (FTO) substrate via a facile and template-free crystal-seed-assisted hydrothermal method by addition of ammonium sulfate ((NH 4) 2SO 4) and hydrogen peroxide (H 2O 2). X-ray diffraction (XRD) studies indicated that the films are of orthorhombic structure. Scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) analysis showed that the film was composed of brick-like nanostructures with a preferred growing direction along (002). The influence of seed layer, (NH 4) 2SO 4 and H 2O 2 on the products were also studied. The film showed good cyclic stability, comparable switching speed and coloration efficiency (30.1 cm 2 C -1). A complementary electrochromic device based on the film and Prussian blue depicted highly improved color contrast, coloration/bleaching response (1.8 and 3.7 s respectively) and coloration efficiency (164.6 cm 2 C -1).
      Keywords
      Electrochromic
      Tungsten Oxide
      Ammonium Sulfate
      Color contrast
      Coloration efficiencies
      Complementary
      Cyclic stability
      Electrochromics
      Fluorine doped tin oxide
      Growing direction
      Hydrothermal methods
      Nano-structured
      Orthorhombic structures
      Performance based
      Prussian blue
      Seed layer
      Switching speed
      Template-free
      Tungsten oxide
      Tungsten trioxide
      Brick
      Electrochromic devices
      Fluorine
      High resolution transmission electron microscopy
      Hydration
      Hydrogen peroxide
      Nanostructures
      Scanning electron microscopy
      Tin
      Tin oxides
      Tungsten compounds
      X ray diffraction
      Tungsten
      Permalink
      http://hdl.handle.net/11693/28178
      Published Version (Please cite this version)
      http://dx.doi.org/10.1166/jnn.2012.6139
      Collections
      • Department of Electrical and Electronics Engineering 3702
      • Institute of Materials Science and Nanotechnology (UNAM) 1930
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