Electrochromic tin oxide

Details Electrochromic tin oxide Electrochromic tin oxide

1996-12-23

1999-03-02

Kopec, Mark

Compositions

Electrically conductive or emissive compositions

Metal compound containing

428402, 75255, H01B 108, B32B 516

Patent

active

058766340

ABSTRACT:
Tin oxide doped with an electrochromically effective amount of a metal, e.g. antimony or niobium, which provides a color change when the doped tin oxide is exposed to an electrochemical potential in the presence of mobile ions. Particles of electrochromic doped tin oxide, e.g. coated on a white or pastel pigment substrate, have a contrast ratio greater than 1.2, where contrast ratio is a measure of electrochromic functionality of a material and is the ratio of reflectance of the material in an oxidized state to the color of the material in a reduced state and where color is a photodiode measurement of the value of light reflected off the oxidized or reduced material from a constant source of light shining on the material. Such doped tin oxide-containing particles are useful as electrochromic material in display devices.

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