US 2007/0177243 A1 · Green electrochromic (EC) material and device

Abstract

Three green EC materials based on thiophene, and a green EC material based on pyrazine are disclosed. A first thiophene derivative (2,3-Di-thiophen-2-yl-thieno[3,4-b]pyrazine), which was previously investigated as a nonlinear optical material, is here disclosed for its use as an EC material, and for its incorporation into an EC device. Synthesis of two new thiophene derivatives (2,5-di(thien-2-yl)-3,4-di(2,2,2-trifluoro-ethoxy)-thiophene and 2,5-(2,3-dihydro-thieno[3,4-b][1,4]dioxin-5-yl)-3,4-di(2,2,2-trifluoro-ethoxy)-thiophene), and a new pyrazine derivative (2,3-dibenzyl-5,7-di(thien-2-yl)thieno[3,4-b]pyrazine) are also disclosed, since these materials are all able to selectively change to a green color state, and can be polymerized to achieve a green EC polymer.

Claims15

Dependent claims

An electrochromic device switchable between a first substantially transparent state and a second state in which the electrochromic device exhibits a saturated green color, comprising:

(a) a transparent electrode;
(b) an electrochromic organic material which in a first state is generally transparent and in a second state exhibits a saturated green color, wherein the electrochromic organic material is based on 2,3-dibenzyl-5,7-di(thien-2-yl)thieno[3,4-b]pyrazine;
and
(c) an electrolyte.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

11/223,794Filed 9 Sep 2005

Priority

25 Jun 2002

Published

2 Aug 2007

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

C09K 9/02
Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some…
C08G 61/122
Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule: derived from five- or six-membered…
C08G 61/126
Derived from five-membered heterocyclic compounds: with a five-membered ring containing one sulfur atom in the ring
C09K 2211/1007
Carbocyclic compounds: non-condensed systems

Family

Application10/180,222Division · filed 25 Jun 2002

Application60/495,310Us provisional application · filed 14 Aug 2003

Application60/523,007Us provisional application · filed 18 Nov 2003

Application10/755,433Continuation in part · filed 12 Jan 2004

Application10/755,433Division · filed 12 Jan 2004

Application60/549,035Us provisional application · filed 1 Mar 2004

Application10/917,954Continuation in part · filed 13 Aug 2004

Application60/608,438Us provisional application · filed 9 Sep 2004

Application11/070,392Continuation in part · filed 1 Mar 2005

Application11/223,794Continuation in part · filed 9 Sep 2005

US 2002/0196518 A1Published application