Electrochromic material and electro-optical device using same

Details Electrochromic material and electro-optical device using same Electrochromic material and electro-optical device using same

1990-04-06

1992-01-14

Hille, Rolf

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359265, G02F 101

Patent

active

050804715

ABSTRACT:
An oxidatively coloring electrochromic layer of composition M.sub.y CrO.sub.2+x (0.33.ltoreq.y.ltoreq.2.0 and x.ltoreq.2) where M=Li, Na or K with improved transmittance modulation, improved thermal and environmental stability, and improved resistance to degradation in organic liquid and polymeric electrolytes. The M.sub.y CrO.sub.2+x provides complementary optical modulation to cathodically coloring materials in thin-film electrochromic glazings and electrochromic devices employing polymeric Li.sup.+ ion conductors.

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"Lithium and Sodium insertion in Ternary Chromium Oxides", Koksbang et al., Solid State Ionics, 28-30, 1988, pp. 868-872.
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Koksbang et al., "Lithium Insertion in LiCr.sub.3 O.sub.8,NaCr.sub.3 O.sub.8, and KCr.sub.3 O.sub.8 at Room Temperature and at 125.degree. C.", J. Electrochem. Soc., 136 (1989), pp. 598-605.
Koksbang et al., "Lithium and Sodium Insertion in Ternary Chromium Oxides", Solid State Ionics, 28-30 (1988), pp. 868-872.

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