Electrochromic device

Details Electrochromic device Electrochromic device

1987-04-29

1990-02-20

LaRoche, Eugene R.

G02F 117

Patent

active

049021095

ABSTRACT:
An electrochromic device employing a metal oxide film as an oxidative-coloration layer is provided. The metal oxide film is a porous film comprising grains, 50% in number or more of which have a grain size of 1000 to 5000 .ANG. in diameter, and changes its optical density in a range of 0.3 to 0.65 between a bleached state and a colored state. The metal oxide film is prepared by an anodic oxidation process in which alternating potential is continuously applied to a metallic film initially with a smaller amplitude and subsequently with a larger amplitude.

REFERENCES:
Dautremont-Smith et al., "Electrochromic Cells with Iridium Oxide Display Electrodes", Solid State Ionics, Feb. 1981, pp. 13-18.
Gottesfeld, "The Anodic Rhodium Oxide Film: A Two-Color Electrochromic System", J. Electrochemical Society: Electrochemical Science and Technology, Feb. 1980, pp. 272-277.

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