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Crystallinity Effects in the Optical Modulation of Electrochromic Devices

Published online by Cambridge University Press:  15 February 2011

J. D. Klein  and
S. L. Clauson
J. D. Klein
Affiliation:
EIC Laboratories, Inc., Norwood, MA 02062, [email protected]
S. L. Clauson
Affiliation:
EIC Laboratories, Inc., Norwood, MA 02062, [email protected]
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Abstract

The electrochromic switching behavior of amorphous and crystalline WO3 thin films was investigated. The films were deposited on ITO-coated Corning 7059 glass substrates by sputtering. X-ray diffraction showed the crystalline film to have a mixed monoclinic/orthorhombic crystal structure. The coloration mechanisms in the visible and very near infrared were investigated by hydrogen insertion. A numerical fitting scheme allowed the coloration of the films to be expressed by means of the extinction index. As expected, crystalline WO3 exhibited more modulation in the very near infrared. A reversible crystallographic distortion was associated with the coloration of the crystalline WO3 films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 403: Symposium I – Polycrystalline Thin Films: Structure, Texture, Properties and Applications II , 1995 , 521
Copyright
Copyright © Materials Research Society 1996

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