Electrochromic formulation, method for the production thereof, and electrochromic organic component

• US 8,289,608 B2
• Filed: 09/24/2009
• Issued: 10/16/2012
• Est. Priority Date: 09/30/2008
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Kanitz, Andreas, Roth, Wolfgang
• Primary Examiner(s): Ben, Loha
• Application Number:
  US12/998,247
• Publication Number:
  US 20110181938A1
• Time in Patent Office: 1,118 Days
• Field of Search: 359265-275, 252/582, 252/583, 252/586, 252/600, 525/417, 528/423
• US Class Current: 359/265
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 9/02 Organic tenebrescent materials
• CPC Class Codes: G02F 1/1503 caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions

Abstract

Formulations are used in organically based electrochromic components, e.g. for producing displays and/or state indicators having a longer service life. The service life is increased by end-capping the 4,4′-bipyridinium salt.

Claims

1. An electrochromically active dye comprising:

a 4,4′

-bipyridinium salt having at least two reactive terminal groups, at least one of the reactive terminal groups being replaced or protected by an inert terminal group.

2. The electrochromically active dye as claimed in claim 1, wherein the 4,4′

-bipyridinium salt is poly-N,N′

-dodecylene-4,4′

-dipyridyl.

3. The electrochromically active dye as claimed in claim 1, wherein the inert terminal group is at least one of an alkoxy group, an N-substituted alkyl group and an N-substituted aryl group.

4. A formulation comprising:

an electrochromically active dye formed from a 4,4′

-bipyridinium salt having at least two reactive terminal groups, with at least one of the reactive terminal groups being replaced or protected by an inert terminal group; and

a white pigment and/or a metallocene as a stabilizing agent.

5. The formulation as claimed in claim 4, wherein the inert terminal group is at least one of an alkoxy group, an N-substituted alkyl group and an N-substituted aryl group.

6. An electrochromic organic component comprising:

at least two electrodes; and

a formulation sandwiched between the electrodes, the formulation comprising;

an electrochromically active dye formed from a 4,4′

-bipyridinium salt having at least two reactive terminal groups, with at least one of the reactive terminal groups being replaced or protected by an inert terminal group; and

a white pigment and/or a metallocene as a stabilizing agent.

7. The electrochromic organic component as claimed in claim 6, wherein the inert terminal group is at least one of an alkoxy group, an N-substituted alkyl group and an N-substituted aryl group.