Use of amorphous carbon to promote adhesion between electroactive polymer films and conductive substrates
First Claim
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1. An electroactive laminate, comprising:
- A) a conductive substrate;
B) a layer of amorphous carbon adhered to the conductive substrate; and
C) an electroactive polymer film adhered to the layer of amorphous carbon opposite the conductive substrate.
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Abstract
An interposed layer of amorphous carbon promotes the adhesion between conductive substrates and electrochemically deposited polymers. Such a carbon layer may be deposited directly onto the conductive substrate by conventional methods such as, for example, chemical vapor deposition. The subsequently applied electrochemically deposited polymer adheres more tenaciously to the amorphous carbon coating than if it had been electrodeposited directly onto the conductive substrate.
95 Citations
15 Claims
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1. An electroactive laminate, comprising:
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A) a conductive substrate; B) a layer of amorphous carbon adhered to the conductive substrate; and C) an electroactive polymer film adhered to the layer of amorphous carbon opposite the conductive substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electrochromic display device, comprising:
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A) an electroactive laminate, comprising; i) a conductive substrate; ii) a layer of amorphous carbon adhered to the conductive substrate; and iii) an electroactive electrochromic polymer film adhered to the layer of amorphous carbon opposite the conductive substrate; B) a counterelectrode; C) an electrolyte medium in electrical communication with the electroactive laminate and the counterelectrode; and D) means for supplying a polarity reversible voltage across the electroactive laminate and the counterelectrode. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An electrochromic display device, comprising:
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A) an electroactive laminate, comprising; i) a conductive substrate, including a glass support having at least one layer of fluorine-doped tin oxide from about 100 Angstroms to about 5,000 Angstroms thick thereon; ii) a layer of amorphous carbon, from about 40 Angstroms to about 250 Angstroms thick, adhered to the conductive substrate; and iii) an electroactive electrochromic polymer film, prepared from heterocycles selected from the group consisting of pyrrole, thiophene, aniline, carbazole, azulene, furan, and derivatives and mixtures thereof, adhered to the layer of amorphous carbon opposite the conductive substrate; B) a counterelectrode; C) an electrolyte medium, containing electrolyte selected from the group consisting of lithium tetrafluoroborate and lithium perchlorate and mixtures thereof, in electrical communication with the electroactive laminate and the counterelectrode; and D) means for applying a voltage across the electroactive laminate and the counterelectrode.
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Specification