Prospects for IR emissivity control using electrochromic structures

Jeffrey S. Hale, John A. Woollam

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Electrochromic devices were investigated as a means of efficiently modulating the IR emissivity of space structures. The optical properties of electrochromic materials are modified upon application of a voltage allowing a high degree of control of the modulation. This degree of control is necessary for some low earth orbit space missions where effects such as rapid changes in the earth's albedo can change the temperature of a satellite.Optical constants of semicrystalline WO3 and NiO in their unintercalated and fully intercalated states were measured by variable angle spectroscopic ellipsometry over a spectral range of 2-14 μm. Ta2O5 optical constants were measured for use as a hydrogen ion conductor and Au and ITO optical constants were measured for use as electrodes. Calculations were made of the emissivity modulation of an electrochromic device structure for a 300 K blackbody based on the measured optical constants.

Original languageEnglish (US)
Pages (from-to)174-180
Number of pages7
JournalThin Solid Films
Volume339
Issue number1-2
DOIs
StatePublished - Jan 1 1999

Fingerprint

Optical constants
emissivity
Electrochromic devices
Earth albedo
Earth (planet)
Modulation
modulation
Spectroscopic ellipsometry
low Earth orbits
space missions
hydrogen ions
ITO (semiconductors)
ellipsometry
Protons
Orbits
conductors
Optical properties
Satellites
optical properties
Hydrogen

Keywords

  • Electrochromic devices
  • Emissivity modulation

ASJC Scopus subject areas

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

Cite this

Prospects for IR emissivity control using electrochromic structures. / Hale, Jeffrey S.; Woollam, John A.

In: Thin Solid Films, Vol. 339, No. 1-2, 01.01.1999, p. 174-180.

Research output: Contribution to journalArticle

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