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Infrared reflectance spectroscopy of electrochromic NiOxHy films made by reactive dc sputtering

Published online by Cambridge University Press:  31 January 2011

W. Estrada
Affiliation:
Physics Department, Chalmers University of Technology and University of Gothenburg, S-412 96 Gothenburg, Sweden
A.M. Andersson
Affiliation:
Physics Department, Chalmers University of Technology and University of Gothenburg, S-412 96 Gothenburg, Sweden
C.G. Granqvist
Affiliation:
Physics Department, Chalmers University of Technology and University of Gothenburg, S-412 96 Gothenburg, Sweden
A. Gorenstein
Affiliation:
DFA/IFGW, UNICAMP, CP 6165 Campinas, SP, Brazil
F. Decker
Affiliation:
DFA/IFGW, UNICAMP, CP 6165 Campinas, SP, Brazil
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Abstract

Films of NiOxHy were made by reactive dc magnetron sputtering of Ni followed by electrochemical treatment in KOH. Infrared reflectance spectroscopy with obliquely incident p-polarized light documented a unique topochemical reaction with the bleached state being β–Ni(OH)2 and the colored state being β–NiOOH. The same technique yielded clear, though not yet fully understood, data on the evolution of electrochromism during potentiodynamic cycling.

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Articles
Copyright
Copyright © Materials Research Society 1991

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