Electrochromic variable transmission glazing
First Claim
1. An electrochromic variable transmission glazing comprising:
- first and second transparent substrates joined by an organic polymer having a proton conductivity greater than or equal to 10-5 ohm-1 cm-1 at 20°
C., each of said transparent substrates having an electroconductive layer coated on one face thereof facing said polymer, said first transparent substrate further comprising a layer of an electrochromic material between said electroconductive layer and said organic polymer, and said second transparent substrate further comprising a layer of a material which acts as a counterelectrode between said electroconductive layer and said organic polymer, said counterelectrode comprising protonated iridium oxide deposited by cathode sputtering in the presence of hydrogen and oxygen, and said glazing further comprising a pair of current leads connecting the layers of said substrates to a generator wherein current passing through said layers and said polymer causes said glazing to change color.
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Abstract
An electrochromic variable transmission glazing comprising first and second glass sheets substrates which are joined by an organic polymer whose proton conductivity is greater than or equal to 10-5 ohm-1 cm-1 at 20° C. The glass sheets are coated on their joining faces with transparent electroconductive layers. The first transparent substrate further comprises a layer of electrochromic material, such as tungsten oxide, in contact with the proton conductive polymer. The glazing is characterized by an iridium oxide layer on the second transparent substrate which is interposed between the layer of electroconductive material and the organic polymer. The glazing further comprises a pair of current leads attached to the electroconductive layer which connect the glazing to a generator.
37 Citations
32 Claims
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1. An electrochromic variable transmission glazing comprising:
- first and second transparent substrates joined by an organic polymer having a proton conductivity greater than or equal to 10-5 ohm-1 cm-1 at 20°
C., each of said transparent substrates having an electroconductive layer coated on one face thereof facing said polymer, said first transparent substrate further comprising a layer of an electrochromic material between said electroconductive layer and said organic polymer, and said second transparent substrate further comprising a layer of a material which acts as a counterelectrode between said electroconductive layer and said organic polymer, said counterelectrode comprising protonated iridium oxide deposited by cathode sputtering in the presence of hydrogen and oxygen, and said glazing further comprising a pair of current leads connecting the layers of said substrates to a generator wherein current passing through said layers and said polymer causes said glazing to change color. - View Dependent Claims (2, 3, 4, 5, 6, 7, 18, 23)
- first and second transparent substrates joined by an organic polymer having a proton conductivity greater than or equal to 10-5 ohm-1 cm-1 at 20°
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8. A method for making an electrochromic variable transmission glazing comprising:
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coating one face of first and second transparent substrates with a transparent electroconductive layer thereupon; coating the electroconductive layer of said first transparent substrate with a layer of electrochromic material; coating the electroconductive layer of said second transparent substrate with a counterelectrode material layer by depositing protonated iridium oxide by cathode sputtering in the presence of hydrogen and oxygen; joining said substrates by an organic polymer placed between the electrochromic layer of said first transparent substrate and the counterelectrode of said second substrate, wherein said organic polymer has a proton conductivity greater than or equal to 10-5 ohm-1 at 20°
C.; andconnecting said electroconductive layers of said transparent substrates to a generator by a pair of current leads attached thereto. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 19)
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20. An electrochromic variable transmission glazing comprising:
- first and second transparent glass sheet substrates joined by an organic polymer having a proton conductivity greater than or equal to 10-5 ohm-1 cm-1 at 20°
C., each of said transparent substrates having an electroconductive layer coated on one face thereof facing said polymer, said first transparent substrate further comprising a layer of a cathodic electrochromic material of tungsten trioxide between said electroconductive layer and said organic layer, and said second transparent substrate further comprising a counterelectrode comprising a layer of iridium copolymer;
wherein said organic polymer comprises a substantially anhydrous solution of an inorganic acid in poly(oxyethylene), and said glazing further comprising a pair of current leads connecting the electroconductive layers of said substrates to a generator, wherein current passing through said layers and said polymers causes said glazing to switch between a neutral faded state and a colored state. - View Dependent Claims (21, 22, 24, 25)
- first and second transparent glass sheet substrates joined by an organic polymer having a proton conductivity greater than or equal to 10-5 ohm-1 cm-1 at 20°
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26. A method for making an electrochromic variable transmission glazing comprising:
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coating one face of each of first and second transparent substrates with a transparent electroconductive layer thereupon, coating the electroconductive layer of said first transparent substrate with a layer of a cathodic electrochromic material, coating the electroconductive layer of said second transparent substrate with a counterelectrode comprising a layer of protonated iridium oxide applied by reactive sputtering assisted by a magnetic field from a metal iridium target in an atmosphere of an oxygen/hydrogen gas mixture, said iridium oxide layer having a thickness of between about 200 and 1000 Angstroms; joining said substrates by an organic polymer having a proton conductivity greater than or equal to 10-5 ohm-1 cm-1 at 20°
C., wherein said polymer is placed between the cathodic electrochromic layer of said first transparent substrate and the counterelectrode of said second substrate, andconnecting the electroconductive layers of said transparent substrates to a generator by a pair of current leads attached thereto. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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Specification