Hostname: page-component-669899f699-7xsfk Total loading time: 0 Render date: 2025-04-28T04:50:26.442Z Has data issue: false hasContentIssue false
  • English
  • Français

Crystal Phase Effects in Electrochromic WO3

Published online by Cambridge University Press:  25 February 2011

J. D. Klein  and
A. Yen
J. D. Klein
Affiliation:
EIC Laboratories, Norwood, MA 02062
A. Yen
Affiliation:
EIC Laboratories, Norwood, MA 02062
Get access

Abstract

The electrochromic behavior of crystalline WO3 thin films of two different crystal structures was investigated. The films were deposited on ITO-coated Coming 7059 glass and transparent single crystal sapphire substrates by electron beam evaporation. The usual monoclinic crystal structure was obtained by post-annealing films deposited at low substrate temperatures. An alternative phase was generated by in-situ growth of crystalline films at high substrate temperatures. The reversible electrochemical insertion of Li was demonstrated by cyclic voltammetry. Optical switching was observed by comparing visible transmittance, visible reflectance, and infrared reflectance spectra of films before and after Li intercalation. The two film types assumed similar crystal structures upon lithiation. High infrared reflectance in the monoclinic phase was described well by an elementary freeelectron plasma edge model. However, the high-Ts. film exhibited significantly poorer reflectance in the infrared when lithiated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 293: Symposium U – Solid State Ionics III , 1992 , 389
Copyright
Copyright © Materials Research Society 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

1. Schirmer, O.F., Wittwer, V., Baur, G., and Brandt, G., J. Electrochem. Soc. 124, 749 (1977).Google Scholar
2. Svensson, J.S.E.M. and Granqvist, C.G., Appl. Phys. Lett. 45, 828 (1984).Google Scholar
3. Goldner, R.B., Mendelsohn, D.H., Alexander, J., Henderson, W.R., Fitzpatrick, D., Haas, T.E., Sample, H.H., Rauh, R.D., Parker, M.A., and Rose, T.L., Appl. Phys. Lett. 43, 1093 (1983).Google Scholar
4. Arntz, F.O., Goldner, R.B., Morel, B., Hass, T.E., and Wong, K.K., J. Appl. Phys. 67, 3177 (1990).Google Scholar
5. Goldner, R.B., Seward, G., Wong, K., Berera, G., Haas, T., and Norton, P., Optical Materials Technology for Energy Efficiency and Solar Energy Conversion VI, edited by Lampert, C.M. (Proc. SPIE 823, Bellingham, WA 1987) pp. 101–105.Google Scholar
6. Salje, E., Acta Cryst. B31, 574 (1977).Google Scholar
7. Klein, J.D., Yen, A., and Cogan, S.F., J. Appl. Phys. 6, 1825 (1990).Google Scholar
8. Goldner, R.B., Norton, P., Wong, K., Foley, G., Goldner, E.L., Seward, G., and Chapman, R., Appl. Phys. Lett. 42, 536 (1985).Google Scholar
9. Cogan, S.F., Plante, T.D., Parker, M.A., and Rauh, R.D., J. Appl. Phys. 60, 2735 (1986).Google Scholar