Electrochromic properties of epitaxial WO^sub 3^ thin films grown on sapphire substrates
Electrochromic properties are reported for monoclinic (001) WO3 epitaxial films grown on r-plane sapphire substrates. By applying a positive bias in 10 mM aqueous solution of sulfuric acid, an immediate increase in optical reflectance in a near-infrared region and a subsequent increase in optical ab...
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| Veröffentlicht in: | Japanese Journal of Applied Physics 2018-10, Vol.57 (10), p.100309 |
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| container_issue | 10 |
| container_start_page | 100309 |
| container_title | Japanese Journal of Applied Physics |
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| creator | Yano, Mitsuaki Kuwagata, Wataru Mito, Hiroki Koike, Kazuto Kobayashi, Shintaro Inaba, Katsuhiko |
| description | Electrochromic properties are reported for monoclinic (001) WO3 epitaxial films grown on r-plane sapphire substrates. By applying a positive bias in 10 mM aqueous solution of sulfuric acid, an immediate increase in optical reflectance in a near-infrared region and a subsequent increase in optical absorbance in a visible to near-infrared region were generated by forming a hydrate and a tungsten bronze, respectively. The tungsten bronze disappeared after applying a negative bias in the solution, while the hydrate remained and required an annealing in air to disappear. These transitions were reversibly and repeatedly observed despite the restriction by the substrate. |
| doi_str_mv | 10.7567/JJAP.57.100309 |
| format | Article |
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By applying a positive bias in 10 mM aqueous solution of sulfuric acid, an immediate increase in optical reflectance in a near-infrared region and a subsequent increase in optical absorbance in a visible to near-infrared region were generated by forming a hydrate and a tungsten bronze, respectively. The tungsten bronze disappeared after applying a negative bias in the solution, while the hydrate remained and required an annealing in air to disappear. 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| ispartof | Japanese Journal of Applied Physics, 2018-10, Vol.57 (10), p.100309 |
| issn | 0021-4922 1347-4065 |
| language | eng |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Aqueous solutions Bias Electrochromism Epitaxial growth Near infrared radiation Reflectance Sapphire Substrates Sulfuric acid Thin films Tungsten bronze |
| title | Electrochromic properties of epitaxial WO^sub 3^ thin films grown on sapphire substrates |
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