Electrochromic metal oxides

Details Electrochromic metal oxides Electrochromic metal oxides

1999-02-24

2000-12-26

Kopec, Mark

Compositions

Electrically conductive or emissive compositions

Metal compound containing

2525181, 359273, H01B 108, G02F 1153

Patent

active

061653888

ABSTRACT:
Tin oxide doped with an electrochemically 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, and may be employed in display devices that advantageously exhibit a linear or nearly linear relationship between stored electrical charge and voltage, and which also exhibit linear or nearly linear optical characteristics as a function of voltage. Electrochromically active materials made from metal oxides and doped with substances other than antimony and niobium have also been found with high contrast ratios. These additional doped materials may be substituted for electrochromically active antimony-doped tin oxide in electrochromic displays.

REFERENCES:
patent: 3978007 (1976-08-01), Giglia et al.
patent: 4160241 (1979-07-01), Shimizu et al.
patent: 4280754 (1981-07-01), Yano et al.
patent: 4342031 (1982-07-01), Lapeyre
patent: 4354741 (1982-10-01), Mano et al.
patent: 4465339 (1984-08-01), Baucke et al.
patent: 4550982 (1985-11-01), Hirai
patent: 4596722 (1986-06-01), Warzawski
patent: 4652090 (1987-03-01), Uchikawa et al.
patent: 4746200 (1988-05-01), Kamigaki
patent: 4750817 (1988-06-01), Sammells
patent: 4810067 (1989-03-01), Demiryont
patent: 4824221 (1989-04-01), Endo et al.
patent: 4893903 (1990-01-01), Thaker et al.
patent: 4902110 (1990-02-01), Green
patent: 4966675 (1990-10-01), Steininger
patent: 5011582 (1991-04-01), Oshikawa et al.
patent: 5078480 (1992-01-01), Warszawski
patent: 5104583 (1992-04-01), Richardson
patent: 5189549 (1993-02-01), Leventis et al.
patent: 5216536 (1993-06-01), Agrawal et al.
patent: 5227252 (1993-07-01), Murayama et al.
patent: 5284705 (1994-02-01), Cahill
patent: 5413739 (1995-05-01), Coleman
patent: 5442478 (1995-08-01), Lampert et al.
patent: 5500759 (1996-03-01), Coleman
patent: 5545250 (1996-08-01), Bergmann et al.
patent: 5707556 (1998-01-01), Babinec et al.
patent: 5754329 (1998-05-01), Coleman
patent: 5876633 (1999-03-01), Coleman
Masumi, Response-Improved Electrochromic Display Based on Organic Materials, Proc. of SID 23/4:245-248 (1982).
Nomura et al., Electrochemical and Electrochromic Properties of Polymer Complex Films Composed of Polytetramethyleneviologen and Poly-[.rho.-styrenesulfonic Acid] Containing a Conductive Powder, J. Macromol. Sci.-Chem.A26(2&3):593-608 (1989).
Orel et al., Electrochemical and Structural Properties of SnO.sub.2 and Sb:SnO.sub.2 Transparent Electrodes with Mixed Electronically Conductive and Ion-Storage Characteristics, J. Electrochem. Soc. 141(9): L127-L130 (1984).

Affiliated with

Also associated with

Rating

Electrochromic metal oxides does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrochromic metal oxides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrochromic metal oxides will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-991246