@article{oai:kitami-it.repo.nii.ac.jp:00007909,
 author = {Abe, Yoshio and Suzuki, Takahiro and Kawamura, Midori and Sasaki, Katsutaka and Itoh, Hidenobu},
 journal = {Solar Energy Materials and Solar Cells},
 month = {Apr},
 note = {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.},
 pages = {38--42},
 title = {Electrochromic properties of NiOOH thin films prepared by reactive sputtering in an H2O atmosphere in various aqueous electrolytes},
 volume = {99},
 year = {2012}
}