Infrared emittance modulation devices using electrochromic crystalline tungsten oxide, polymer conductor, and nickel oxide

Chris Trimble, Michael DeVries, Jeffrey S. Hale, Daniel W. Thompson, Thomas E. Tiwald, John A. Woollam

Research output: Contribution to journalConference article

26 Scopus citations


A prototypical small area electrochromic device was fabricated, and emissivity was measured from 1 to 30 microns. The devices show change in emissivity from about 0.60 to about 0.68, that is a total modulation of 13%. The emittance performance was calculated, based on the reflectivity modulation. One difference between these devices and the more frequently explored visible light transmission devices is the utilization of crystalline tungsten oxide instead of highly disordered amorphous tungsten oxide. The crystalline tungsten oxide and nickel oxide charge storage films are characterized by IR transmission/reflection, and spectroscopic ellipsometry. A theoretical model has been developed which describes the device performance to within 10% of experimental results.

Original languageEnglish (US)
Pages (from-to)26-34
Number of pages9
JournalThin Solid Films
Publication statusPublished - Nov 1 1999
EventProceedings of the 1999 26th International Conference on Metallurgic Coatings and Thin Films - San Diego, CA, USA
Duration: Apr 12 1999Apr 15 1999


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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