Large-area transparent conductive coatings including alloyed carbon nanotubes and nanowire composites, and methods of making the same
First Claim
1. A method of making a coated article comprising a substrate supporting a carbon nanotube (CNT) inclusive thin film, the method comprising:
- providing a CNT-inclusive ink;
applying the ink to the substrate to form an intermediate coating;
providing a material over the intermediate coating;
preparing a solution comprising PdCl2; and
exposing the intermediate coating to the solution comprising PdCl2 so that Pd nucleates at junctions within the intermediate coating, thereby reducing porosity in the intermediate coating in forming the CNT-inclusive thin film.
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Abstract
Certain example embodiments of this invention relate to large-area transparent conductive coatings (TCCs) including carbon nanotubes (CNTs) and nanowire composites, and methods of making the same. The σdc/σopt ratio of such thin films may be improved via stable chemical doping and/or alloying of CNT-based films. The doping and/or alloying may be implemented in a large area coating system, e.g., on glass and/or other substrates. In certain example embodiments, a CNT film may be deposited and then doped via chemical functionalization and/or alloyed with silver and/or palladium. Both p-type and n-type dopants may be used in different embodiments of this invention. In certain example embodiments, silver and/or other nanowires may be provided, e.g., to further decrease sheet resistance. Certain example embodiments may provide coatings that approach, meet, or exceed 90% visible transmission and 90 ohms/square target metrics.
135 Citations
16 Claims
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1. A method of making a coated article comprising a substrate supporting a carbon nanotube (CNT) inclusive thin film, the method comprising:
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providing a CNT-inclusive ink; applying the ink to the substrate to form an intermediate coating; providing a material over the intermediate coating; preparing a solution comprising PdCl2; and exposing the intermediate coating to the solution comprising PdCl2 so that Pd nucleates at junctions within the intermediate coating, thereby reducing porosity in the intermediate coating in forming the CNT-inclusive thin film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of making a coated article comprising a substrate supporting a carbon nanotube (CNT) inclusive thin film, the method comprising:
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providing a CNT-inclusive ink, the CNT-inclusive ink comprising double-wall nanotubes; applying the ink to the substrate to form an intermediate coating; drying the intermediate coating or allowing the intermediate coating to dry; providing an adhesion-promoting layer over the intermediate coating; doping the intermediate coating with a salt and/or super acid so as to chemically functionalize the intermediate coating; providing a solution comprising Pd; exposing the intermediate coating to the solution comprising Pd so that Pd nucleates at junctions within the intermediate coating, thereby reducing porosity in the intermediate coating in forming the CNT-inclusive thin film; and applying an overcoat or passivation layer over the intermediate coating following the exposing. - View Dependent Claims (15, 16)
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Specification