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

Date
2012
Editor(s)
Advisor
Supervisor
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Instructor
Source Title
Journal of Nanoscience and Nanotechnology
Print ISSN
1533-4880
Electronic ISSN
Publisher
American Scientific Publishers
Volume
12
Issue
5
Pages
3838 - 3847
Language
English
Journal Title
Journal ISSN
Volume Title
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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).

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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
Citation
Published Version (Please cite this version)