Direct observation of the structure of nickel oxide electrochromic thin films by HRTEM

Kazuki Yoshimura; Takeshi Miki; Sakae Tanemura

doi:10.1117/12.217325

23 August 1995 Direct observation of the structure of nickel oxide electrochromic thin films by HRTEM

Kazuki Yoshimura, Takeshi Miki, Sakae Tanemura

Proceedings Volume 2531, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIV; (1995) https://doi.org/10.1117/12.217325
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

To investigate the microstructure of nickel oxide electrochromic films, cross-sectional observation of sputtered nickel oxide film was performed using a high resolution electron microscope. Lattice and atomic image could be observed for an as-deposited sample and a bleached sample. These images showed that crystallized NiO exists in both samples. As- deposited film contained a small amount of Ni₂O₃. One of [111] axis shrank about 3% and the lattice was a little bit strained in the bleached state. The fact that no trace of Ni(OH)₂ or other species was observed implies that the boundary and surface of NiO microcrystallites played an important role in the electrochromic reaction.

Citation Download Citation

Kazuki Yoshimura, Takeshi Miki, and Sakae Tanemura "Direct observation of the structure of nickel oxide electrochromic thin films by HRTEM", Proc. SPIE 2531, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIV, (23 August 1995); https://doi.org/10.1117/12.217325

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