ELECTRICALLY CONDUCTIVE TRANSPARENT COATINGS COMPRISING ORGANIZED ASSEMBLIES OF CARBON AND NON-CARBON COMPOUNDS

• US 20090035555A1
• Filed: 07/29/2008
• Published: 02/05/2009
• Est. Priority Date: 08/03/2007
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Grigorian, Leonid, Colbern, Steven G., Gump, Robert L., Brahim, Sean Imtiaz
• Granted Patent: US 8,309,226 B2
• Time in Patent Office: Days
• US Class Current: 428/328
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: H01B 1/04 mainly consisting of carbon-silicon compounds, carbon or silicon
• CPC Class Codes: H01B 1/18 the conductive material comprising carbon-silicon compounds, carbon or silicon
• CPC Class Codes: H01J 1/02 Main electrodes
• CPC Class Codes: H01J 17/04 Electrodes; Screens
• CPC Class Codes: H01J 2329/02 Electrodes other than control electrodes
• CPC Class Codes: H01J 29/02 Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
• CPC Class Codes: H01J 9/02 Manufacture of electrodes or electrode systems
• CPC Class Codes: H05B 33/28 of translucent electrodes
• CPC Class Codes: H10K 85/225 comprising substituents
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/256 Heavy metal or aluminum or compound thereof
• CPC Class Codes: Y10T 428/265 1 mil or less
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer

Abstract

This invention is directed to an article comprising a transparent substrate and an electrically conductive transparent coating deposited on the transparent substrate. This invention is also directed to methods for preparing the electrically conductive transparent coating and depositing the coating on the transparent substrate. This invention is further directed to devices containing such articles. The electrically conductive transparent coating comprises carbon nanotubes filled, coated, or both filled and coated by a non-carbon material.

Claims

1. An article comprising:

a transparent substrate,

and an electrically conductive transparent coating deposited on the transparent substrate, the coating comprises carbon nanotubes filled with one or more non-carbon materials comprising a titanium compound, a manganese compound, iron, iron hydride, cobalt, cobalt hydride, nickel, nickel hydride, palladium, palladium hydride, platinum, platinum hydride, a halogen, an interhalogen compound, or the combination thereof;

wherein the transmittance of the coating at about 550 nm wavelength is at least 30%; and

the surface electrical resistance of the coating is no more than 50×

10³ ohms/square.

2. The electrically conductive transparent coating according to claim 1, wherein said transmittance at about 550 nm wavelength is at least 60%.

3. The electrically conductive transparent coating according to claim 1, wherein said surface electrical resistance of the coating is no more than 10×

10³ ohms/square.

4. The electrically conductive transparent coating according to claim 1, wherein the thickness of the coating is in the range of 40 nm to 1,500 nm.

5. The electrically conductive transparent coating according to claim 1, wherein said carbon nanotubes are single wall carbon nanotubes, multi wall carbon nanotubes, or the combination thereof.

6. The electrically conductive transparent coating according to claim 5, wherein said carbon nanotubes are single wall carbon nanotubes with an outer diameter varying in the range of 0.65 nm to 3.0 nm.

7. The electrically conductive transparent coating according to claim 1, wherein said non-carbon material comprises a halogen or an interhalogen compound.

8. The electrically conductive transparent coating according to claim 7, wherein said halogen is bromine or iodine.

9. The electrically conductive transparent coating according to claim 1, wherein said non-carbon material comprises a titanium compound, iron, cobalt, nickel, palladium, platinum, or the combination thereof.

10. The electrically conductive transparent coating according to claim 9, wherein said non-carbon material comprises a titanium compound.

11. The electrically conductive transparent coating according to claim 10, wherein said titanium compound is titanium.

12. The electrically conductive transparent coating according to claim 9, wherein said non-carbon material comprises cobalt, nickel, palladium or platinum.

13. The electrically conductive transparent coating according to claim 1, wherein said carbon nanotubes are further coated with a second non-carbon material.

14. The electrically conductive transparent coating according to claim 13, wherein said second non-carbon material comprises a titanium compound, a manganese compound, iron, iron hydride, cobalt, cobalt hydride, nickel, nickel hydride, palladium, palladium hydride, platinum, platinum hydride, a halogen, an interhalogen compound, or the combination thereof.

15. The electrically conductive transparent coating according to claim 14, wherein said second non-carbon material comprises bromine, iodine, an interhalogen compound, or the combination thereof.

16. The electrically conductive transparent coating according to claim 14, wherein said second non-carbon material comprises a titanium compound, a manganese compound, iron, cobalt, nickel, palladium, platinum, or the combination thereof.

17. An article comprising:

a transparent substrate, and

an electrically conductive transparent coating deposited on the transparent substrate,

the coating comprises carbon nanotubes that were previously reacted with a halogen precursor comprising a halogen or an interhalogen compound, then their halogen contents were partially or completely removed,

wherein the transmittance of the coating at about 550 nm wavelength is at least 30%, and the surface electrical resistance of the coating is no more than 50×

10³ ohms/square.

18. The article according to claim 17, wherein the halogen content of the coating is less than 1 weight %.

19. The article according to claim 18, wherein the halogen content of the coating is less than 0.1 weight %.

20. The article according to claim 17, wherein said carbon nanotubes are single wall carbon nanotubes, multi wall carbon nanotubes, or the combination thereof.

21. The article according to claim 20, wherein said carbon nanotubes are single wall carbon nanotubes with an outer diameter varying in the range of 0.65 nm to 3.0 nm.

22. The article according to claim 17, wherein said halogen precursor comprises bromine or iodine.

23. The method according to claim 17, wherein said halogen precursor comprises an interhalogen compound.

24. The method for preparing an article according to claim 17, comprising the steps of:

reacting carbon nanotubes with a halogen precursor comprising a halogen or an interhalogen compound to obtain halogen-containing carbon nanotubes,

depositing the halogen-containing carbon nanotubes on a transparent substrate to form a coating on the substrate,

removing the halogen contents completely from the coating,

whereby the article is prepared.

25. The method for preparing an article according to claim 17, comprising the steps of:

reacting carbon nanotubes with a halogen precursor comprising a halogen or an interhalogen compound to obtain halogen-containing carbon nanotubes,

removing the halogen contents partially or completely from the halogen-containing carbon nanotubes to form the carbon nanotubes having halogen removed, and

depositing the carbon nanotubes having halogen removed on a transparent substrate,

whereby the article is prepared.