Infrared Properties Of Electrochromic Materials

Stuart F. Cogan; R. David Rauh; John D. Westwood; Douglas I. Plotkin; Rochelle B. Jones

doi:10.1117/12.962161

12 December 1989 Infrared Properties Of Electrochromic Materials

Stuart F. Cogan, R. David Rauh, John D. Westwood, Douglas I. Plotkin, Rochelle B. Jones

Proceedings Volume 1149, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion VIII; (1989) https://doi.org/10.1117/12.962161
Event: 33rd Annual Technical Symposium, 1989, San Diego, United States

Abstract

Thin films of crystalline LiXWO3 exhibit large increases in infrared reflectance (2-16 μm) on lithium insertion, in keeping with the Drude model of free electron reflectance. Amorphous Li_xWO₃ and weakly crystalline Li_xV₂O₅ maintain a high degree of infrared transparency for 0<x<0.5. By contrasting the infrared reflectance of a crystalline Li_xWO₃ film against an absorptive substrate, coatings with variable IR emittance can be obtained. An emittance modulation of 0.25-0.82 in the 8-12 μm region has been obtained with crystalline Li_xWO₃ on glass substrates. The design and electrochromic materials requirements for variable emittance coatings are discussed.

Citation Download Citation

Stuart F. Cogan, R. David Rauh, John D. Westwood, Douglas I. Plotkin, and Rochelle B. Jones "Infrared Properties Of Electrochromic Materials", Proc. SPIE 1149, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion VIII, (12 December 1989); https://doi.org/10.1117/12.962161

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