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Electrochromic device using poly(3,4-ethylenedioxythiophene) and derivatives thereof

  • US 20050237594A1
  • Filed: 04/26/2004
  • Published: 10/27/2005
  • Est. Priority Date: 04/26/2004
  • Status: Active Grant
First Claim
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1. A complementary electrochromic device, comprising:

  • a first conductive layer;

    a second conductive layer, which may be the same as or different from the first conductive layer;

    a cathodically coloring polymer layer in electrical contact with the first conductive layer;

    an anodically coloring substance layer in electrical contact with the second conductive layer;

    a transparent electrolyte layer positioned between and in contact with both the cathodically coloring polymer layer and the anodic coloring substance layer;

    wherein;

    upon application of a negative voltage to the first conductive layer relative to the second conductive layer, the cathodically coloring polymer layer and the anodically coloring substance layer are both in a low transmissivity state and upon application of a positive voltage to the first conductive layer relative to the second conductive layer, the cathodically coloring polymer and the anodically coloring substance layer are both in a high transmissivity state;

    wherein;

    the cathodically coloring polymer has the chemical structure;

    embedded imagewherein;

    R1 is selected from the group consisting of [—

    CH2

    ]r

    CH2CH(R2)— and



    CH2C(R3)(R4)CH2

    ;

    r is 1, 2, 3, or 4;

    n is the number of repeat monomer units in the polymer;

    R2 is selected from the group consisting of branched or straight-chain (1C-20C)alkyl, hydroxy(1C-20C)alkyl, methoxy(1C-20C)alkyl and phenyl;

    R3 and R4 are independently selected from the group consisting of branched or straight-chain (1C-10C)alkyl and phenyl; and

    , the anodically coloring substance comprises a chemical compound selected from the group consisting of an indium hexacyanometallate and a transition metal hexacyanometallate.

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