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Proceedings Paper

Materials And Devices In Electrochromic Window Development
Author(s): Stuart F. Cogan; Elizabeth J. Anderson; Timothy D. Plante; R. David Rauh
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Paper Abstract

Windows with switchable electrochromic glazings are potentially useful for regulating solar input to building interiors. In this article, we describe the structure and operation of a proposed solid-state electrochromic glazing based on crystalline LixWO3 (c-LiXWO3) and a low coloration efficiency counter electrode material such as amorphous Nb2O5 (a-Nb2O5). The importance of reversibility in electrochromic glazing operation is emphasized, and optical switching experiments that demonstrate reversible lithium insertion/extraction in c-LixW03, a-LixWO3, and a-LixNb2O5 are described. Additional optical switching experiments in tandem electrochromic cells comprised of c-LixWO3/a-Nb2O5 and a-LixWO3/a-Nb2O5 demonstrated the proposed design, indicating reversible optical switching over 500 and 200 complete cycles, respectively, without degradation. Optical data on the evolution of reflective and absorp-tive modulation in c-LixWO3 are presented and solar attenuation results are used to demon-strate the advantage of using crystalline electrochromics to conserve daylighting during electrochromic window operation.

Paper Details

Date Published: 2 December 1985
PDF: 9 pages
Proc. SPIE 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV, (2 December 1985); doi: 10.1117/12.966284
Show Author Affiliations
Stuart F. Cogan, EIC Laboratories, Inc. (United States)
Elizabeth J. Anderson, EIC Laboratories, Inc. (United States)
Timothy D. Plante, EIC Laboratories, Inc. (United States)
R. David Rauh, EIC Laboratories, Inc. (United States)

Published in SPIE Proceedings Vol. 0562:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV
Carl M. Lampert, Editor(s)

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