Improvement in Photochromic Property of Nickel Oxide-Based Photochromic Composite Films by Cobalt Addition

  •  Hidetoshi Miyazaki    
  •  Narumi Eimori    
  •  Takahiro Matsuura    
  •  Toshitaka Ota    


Nickel oxide (NiO)-based composite films with various Cobalt/Nickel (Co/Ni) ratios were fabricated, and the photochromic properties of the resulting films were evaluated. The NiO particle sizes in the composite films with Co/Ni ratios of 0~0.02 were 40~70 nm. Increase in the Co addition ratio to the composite films caused a decrease in the initial transmittance of the films, and the films with Co/Ni ratio of 0.005 and 0.01 showed a larger transmittance modulation. Co addition caused an increase in the bleaching and coloring rates, which were the largest in the film with Co/Ni ratio of 0.005.

This work is licensed under a Creative Commons Attribution 4.0 License.
  • ISSN(Print): 1927-0585
  • ISSN(Online): 1927-0593
  • Started: 2012
  • Frequency: quarterly

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