Annealing effect on electrochromic properties of tungsten oxide nanowires |
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Authors: | Chia-Ching Liao Fu-Rong Chen Ji-Jung Kai |
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Affiliation: | aDepartment of Engineering and System Science, National Tsing Hua University, Hsinchu, 300 Taiwan, ROC |
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Abstract: | The effect of thermal annealing on the electrochromic properties of the tungsten oxide (WO3−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 W6+ 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. |
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Keywords: | WO3− x nanowires Thermal annealing Electrochromic properties |
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