Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
78994 | Solar Energy Materials and Solar Cells | 2012 | 5 Pages |
Nickel oxyhydroxide (NiOOH) thin films were prepared by reactive sputtering using H2O as a reactive gas, and the electrochromic (EC) properties of these thin films were investigated in alkaline, neutral, and acidic aqueous electrolyte solutions. A stable EC cycling of up to 100 cycles was obtained for the NiOOH thin films in electrolyte solutions with a wide pH range of 4.1–13.5. However, the EC cycling degraded drastically after several tens of cycles in an electrolyte with pH=2.0. In the stable pH region, the NiOOH films exhibited a large transmittance change from approximately 30–90%, although the response speed slowed with decreasing pH of the electrolytes.
Graphical AbstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Nickel oxyhydroxide (NiOOH) thin films were prepared by reactive sputtering using H2O gas. ► A stable electrochromic cycling was obtained in electrolyte solutions with pH=4.1–13.5. ► NiOOH films exhibited a large transmittance change from approximately 30% to 90%.