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Particle removal from electrochromic films using non-aqueous fluids

  • US 10,767,143 B2
  • Filed: 03/06/2014
  • Issued: 09/08/2020
  • Est. Priority Date: 03/06/2014
  • Status: Active Grant
First Claim
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1. A method of forming an electrochromic device comprising:

  • depositing a first conductive layer over a substrate;

    depositing a first electrode layer over the first conductive layer, wherein the first electrode layer is one of an electrochromic layer or a counter electrode layer;

    depositing an ion conductor layer over the first electrode layer, wherein a film stack includes the first conductive layer, the first electrode layer, and the ion conductor layer;

    exposing the ion conductor layer to a non-aqueous liquid to remove particulate material having a size between about 0.1 μ

    m and about 1000 μ

    m, wherein the non-aqueous liquid is selected from the group consisting of a hydrofluorocarbon, a fluorocarbon, a polymeric fluorinated solvent, and a fluoride surfactant;

    depositing a second electrode layer over the film stack after exposing the ion conductor layer to the non-aqueous liquid, wherein the second electrode layer is the other of the electrochromic layer or the counter electrode layer; and

    depositing a second conductive layer on the second electrode layer, wherein the electrochromic device has a defect density of less than 1 defect/m2, and wherein the electrochromic device is configured for use in a window.

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