Multi-cell solid-state electrochromic device

  • US 7,961,375 B2
  • Filed: 06/25/2008
  • Issued: 06/14/2011
  • Est. Priority Date: 06/25/2008
  • Status: Active Grant
First Claim
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1. A multi-cell electrochromic device, comprising:

  • a plurality of solid-state electrochromic cells arranged in an optical alignment, each electrochromic cell being separated from an adjacent electrochromic cell in the optical alignment by a transparent conductive layer that is shared by the two adjacent electrochromic cells,a first electrochromic cell of the plurality of solid-state electrochromic cells comprising;

    a first transparent conductive layer;

    a counter electrode layer formed in contact with the first transparent conductive layer;

    an ion conductor layer formed in contact with the counter electrode layer;

    an electrochromic layer formed in contact with the ion conductor layer; and

    the shared transparent conductive layer formed in contact with the electrochromic layer; and

    a second electrochromic cell of the plurality of solid-state electrochromic cells comprising;

    an electrochromic layer formed in direct contact with the shared transparent conductive layer;

    an ion conductor layer formed in contact with the electrochromic layer;

    a counter electrode layer formed in contact with the ion conductor layer; and

    a second transparent conductive layer formed in direct contact with counter electrode layer,each electrochromic layer comprises tungsten oxide WO3, vanadium oxide V2O5, niobium oxide Nb2O3 or iridium oxide IrO2,each counter electrode layer comprises nickel oxide NiO, tungsten-doped nickel oxide, or iridium oxide IrO2,each ion conductor layer comprises silicon oxide SiO2, titanium oxide TiO2, aluminum oxide Al2O3, or tantalum oxide Ta2O5, anda first voltage being applied between the first transparent conductive layer and the shared transparent conductive layer, and a second voltage being applied between the shared transparent conductive layer and the second transparent conductive layer, the first and second voltages being different from each other.

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