IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0659354
(2010-03-04)
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등록번호 |
US-8460747
(2013-06-11)
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발명자
/ 주소 |
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출원인 / 주소 |
- Guardian Industries Corp.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
13 인용 특허 :
117 |
초록
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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
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.
대표청구항
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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: 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
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 of PdCl2;exposing the intermediate coating to the solution of PdCl2 so that the Pd nucleates at junctions within the intermediate coating, thereby reducing porosity in the intermediate coating in forming the CNT-inclusive thin film; andapplying an overcoat or passivation layer over the intermediate coating following the exposing. 2. The method of claim 1, further comprising 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. 3. The method of claim 2, further comprising using a slot die apparatus to apply the ink having the adjusted rheological properties to the substrate. 4. The method of claim 1, further comprising drying the intermediate coating or allowing the intermediate coating to dry. 5. The method of claim 1, wherein the material provided over the intermediate coating is PVP. 6. The method of claim 1, further comprising doping the intermediate coating so as to chemically functionalize the intermediate coating in forming the CNT-inclusive thin film. 7. The method of claim 1, wherein reducing porosity in the coating reduces sheet resistance. 8. The method of claim 7, wherein the sheet resistance is reduced while visible transmission remains relatively unchanged. 9. The method of claim 1, wherein the overcoat or passivation layer comprises PEDOT:PSS, zirconia, a silicon-based thin film, a polymer, and/or a resins. 10. The method of claim 1, further comprising substantially planarizing the CNT-inclusive film to reduce surface roughness. 11. The method of claim 10, wherein the CNT-inclusive film is substantially planarized via the overcoat or passivation layer. 12. The method of claim 10, wherein the CNT-inclusive film is substantially planarized via deposition of an additional layer. 13. The method of claim 1, further comprising providing a silvering solution; andexposing the intermediate coating to the silvering solution to short junctions in the intermediate coating. 14. The method of claim 13, wherein exposing of the intermediate coating to the silvering solution is performed after exposing the intermediate coating to the solution of PdCl2. 15. The method of claim 1, further comprising preparing a silvering solution by dissolving silver nitrate in deionized water; andexposing the intermediate coating to the silvering solution to short junctions in the intermediate coating. 16. The method of claim 15, wherein exposing of the intermediate coating to the silvering solution is performed after exposing the intermediate coating to the solution of PdCl2. 17. 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, the CNT-inclusive ink comprising double-wall nanotubes;applying the ink 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 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 of PdCl2;exposing the intermediate coating to the solution of PdCl2 so that the Pd nucleates at junctions within the intermediate coating, thereby reducing porosity in the intermediate coating in forming the CNT-inclusive thin film; andapplying an overcoat or passivation layer over the intermediate coating following the exposing. 18. The method of claim 17, further comprising substantially planarizing the CNT-inclusive film. 19. The method of claim 17, further comprising providing a silvering solution; andexposing the intermediate coating to the silvering solution to short junctions in the intermediate coating. 20. The method of claim 19, wherein exposing of the intermediate coating to the silvering solution is performed after exposing the intermediate coating to the solution of PdCl2. 21. 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, the CNT-inclusive ink comprising double-wall nanotubes;applying the ink 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 adhesion-promoting layer over the intermediate coating;providing a solution of PdCl2;exposing the intermediate coating to the solution of PdCl2 so that the Pd nucleates at junctions within the intermediate coating, thereby reducing porosity in the intermediate coating;providing a silvering solution;exposing the intermediate coating to the silvering solution to short junctions in the intermediate coating in forming the CNT inclusive thin film; andapplying an overcoat or passivation layer over the intermediate coating following the exposing. 22. The method of claim 21, further comprising doping the intermediate coating with a salt and/or super acid so as to chemically functionalize the intermediate coating. 23. The method of claim 21, wherein exposure to the solution of PdCl2 and silvering solutions is performed on a mirror line.
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