Electrochromic element

Details Electrochromic element Electrochromic element

2003-12-15

2008-09-23

Mack, Ricky (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S270000, C359S273000, C359S274000, C359S267000

Reexamination Certificate

active

07428090

ABSTRACT:
Deterioration of characteristics due to repeated cycles of coloration and discoloration in an electrochromic element comprising an oxidative coloration layer composed of a nickel oxide and a electrolyte composed of a solid electrolyte is suppressed. A lower ITO transparent electrode film12is formed on a transparent substrate10. A nickel oxide film32making up an oxidative coloration layer, an intermediate layer33, a tantalum oxide film making up a solid electrolyte layer, a mixed film comprising a tungsten oxide and a titanium oxide making up a reductive coloration layer, and an upper ITO transparent electrode film20making up an upper electrode film are formed on the lower ITO transparent electrode film12on this order. The intermediate layer33is a transparent film comprising a metal oxide such as SnO2, a metal such as Al, or a composite of the metal oxide and the metal.

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J. Göttsche, et al., Solar Energy Materials and Solar Cells, vol. 31, No. 3, pp. 415-428, XP-000417752, “Electrochromic Mixed WO3-TIO2Thin Films Produced By Sputtering and the Sol-Gel Technique: A Comparison”, Dec. 1, 1993.
L. Kullman, et al., “Electrochromic Devices Incorporating Cr Oxide and Ni Oxide Films: Comparison”, Solar Energy, vol. 68, No. 6, XP-004198076, 2000, pp. 517-522.

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