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Electrochromic devices

  • US 8,228,592 B2
  • Filed: 06/22/2011
  • Issued: 07/24/2012
  • Est. Priority Date: 04/30/2010
  • Status: Active Grant
First Claim
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1. A window coating comprising an electrochromic device, the electrochromic device comprising:

  • (a) an electrochromic layer comprising an electrochromic material that is operable for undergoing a first electrochromic transition; and

    (b) a counter electrode layer comprising a counter electrode material that is operable for undergoing a second electrochromic transition;

    wherein the electrochromic device does not contain a layer of electrically insulating, ion conducting material between the electrochromic layer and the counter electrode layer, and wherein at least one of the electrochromic layer and the counter electrode layer contain lithium.

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