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Proceedings Paper

Characterization of electrochromic dc-sputtered nickel-oxide-based films
Author(s): Anne M. Andersson; W. Estrada; Claes-Goeran Granqvist; Annette Gorenstein; Franco Decker
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Paper Abstract

Nonstoichiometric nickel oxide films were made by reactive dc magnetron sputtering. Subsequent electrochemical treatment in KOH established electrochromism. The material was studied by combined mechanical and optical measurements during electrochemical cycling, spectral infrared reflectance, XPS, and X-ray diffraction. Mechanical stress data showed that electrochromic bleaching was associated with proton insertion. P-polarized infrared reflectance showed OH stretching vibrations representative of "free" OH for the bleached state and OH in the presence of hydrogen bonds for the coloured state. XPS data for 01 s core level electrons indicated one binding state in the bleached material and two binding states in the coloured material. Heat-treated samples had significantly decreased electrochromism.

Paper Details

Date Published: 1 August 1990
PDF: 15 pages
Proc. SPIE 1272, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IX, (1 August 1990); doi: 10.1117/12.20436
Show Author Affiliations
Anne M. Andersson, Chalmers Univ. of Technology and Univ. of Gothenburg (Sweden)
W. Estrada, Chalmers Univ. of Technology and Univ. of Gothenburg (Sweden)
Claes-Goeran Granqvist, Chalmers Univ. of Technology and Univ. of Gothenburg (Sweden)
Annette Gorenstein, UNICAMP (Brazil)
Franco Decker, UNICAMP (Brazil)


Published in SPIE Proceedings Vol. 1272:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IX
Claes-Goeran Granqvist; Carl M. Lampert, Editor(s)

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