Annealing effect on electrochromic properties of tungsten oxide nanowires

The effect of thermal annealing on the electrochromic properties of the tungsten oxide (WO 3− x ) nanowires deposited on a transparent conducting substrate by vapor evaporation was investigated. The X-ray diffraction (XRD) indicated that the structures of the nanowries annealed below 500 °C had no s...

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Bibliographic Details
Published in:Solar energy materials and solar cells 2007-08, Vol.91 (13), p.1258-1266
Main Authors: Liao, Chia-Ching, Chen, Fu-Rong, Kai, Ji-Jung
Format: Article
Language:English
Subjects:
Applied sciences
Electrochromic properties
Energy
Exact sciences and technology
Miscellaneous
Natural energy
Solar energy
Thermal annealing
WO 3−x nanowires
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Summary:The effect of thermal annealing on the electrochromic properties of the tungsten oxide (WO 3− x ) nanowires deposited on a transparent conducting substrate by vapor evaporation was investigated. The X-ray diffraction (XRD) indicated that the structures of the nanowries annealed below 500 °C had no significant change. The X-ray photoelectron spectroscopy (XPS) analysis suggested that the O/W ratio and the amount of W 6+ ions in the annealed nanowire films could be increased as increasing annealing temperature. Increased annealing temperature could promote the coloration efficiency and contrast of the nanowire films; however, it could also affect the switching speed of the nanowire films.
ISSN:0927-0248
1879-3398
DOI:10.1016/j.solmat.2007.04.014