Large-area transparent conductive coatings including doped 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;
adjusting rheological properties of the CNT-inclusive ink by adding surfactants to the ink so that any semiconducting CNTs located within the ink are less likely to clump together;
applying the ink having the adjusted rheological properties to the substrate to form an intermediate coating;
providing a material over the intermediate coating to improve adhesion to the substrate; and
doping the intermediate coating with a salt and/or super acid so as to chemically functionalize the intermediate coating in forming the CNT-inclusive thin film.
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Accused Products
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 thim 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.
127 Citations
31 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; adjusting rheological properties of the CNT-inclusive ink by adding surfactants to the ink so that any semiconducting CNTs located within the ink are less likely to clump together; applying the ink having the adjusted rheological properties to the substrate to form an intermediate coating; providing a material over the intermediate coating to improve adhesion to the substrate; and doping the intermediate coating with a salt and/or super acid so as to chemically functionalize 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, 14, 15, 16, 17, 18, 19, 20)
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21. 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; adjusting rheological properties of the CNT-inclusive ink to make the CNT-inclusive ink more water-like; applying the ink having the adjusted rheological properties to the substrate to form an intermediate coating using a slot die apparatus; drying the intermediate coating or allowing the intermediate coating to dry; providing an overcoat over the intermediate coating to improve adhesion to the substrate; doping the intermediate coating with a salt and/or super acid so as to chemically functionalize the intermediate coating in forming the CNT-inclusive thin film; and substantially planarizing the CNT-inclusive film. - View Dependent Claims (22, 23, 24, 25, 31)
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26. 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; adjusting rheological properties of the CNT-inclusive ink by adding surfactants to the ink so that any semiconducting CNTs located within the ink are less likely to clump together; applying the ink having the adjusted rheological properties to the substrate to form an intermediate coating; providing a material over the intermediate coating to improve adhesion to the substrate; doping the intermediate coating with a salt and/or super acid so as to chemically functionalize the intermediate coating in forming the CNT-inclusive thin film; and forming silver nanowires, directly or indirectly, on the substrate to provide a long-distance charge transport to reduce the number of any carbon nanotube junctions that may be formed thereon. - View Dependent Claims (27, 28, 29, 30)
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Specification