Large area deposition and doping of graphene, and products including the same
First Claim
1. A method of making a doped graphene thin film, the method comprising:
- hetero-epitaxially growing an intermediate graphene thin film on a catalyst thin film, the catalyst thin film having a substantially single-orientation large-grain crystal structure;
doping the intermediate graphene thin film with n-type or p-type dopants in making the doped graphene thin film,wherein the doped graphene thin film has a sheet resistance less than 150 ohms/square.
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Accused Products
Abstract
Certain example embodiments of this invention relate to the use of graphene as a transparent conductive coating (TCC). In certain example embodiments, graphene thin films grown on large areas hetero-epitaxially, e.g., on a catalyst thin film, from a hydrocarbon gas (such as, for example, C2H2, CH4, or the like). The graphene thin films of certain example embodiments may be doped or undoped. In certain example embodiments, graphene thin films, once formed, may be lifted off of their carrier substrates and transferred to receiving substrates, e.g., for inclusion in an intermediate or final product. Graphene grown, lifted, and transferred in this way may exhibit low sheet resistances (e.g., less than 150 ohms/square and lower when doped) and high transmission values (e.g., at least in the visible and infrared spectra).
119 Citations
19 Claims
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1. A method of making a doped graphene thin film, the method comprising:
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hetero-epitaxially growing an intermediate graphene thin film on a catalyst thin film, the catalyst thin film having a substantially single-orientation large-grain crystal structure; doping the intermediate graphene thin film with n-type or p-type dopants in making the doped graphene thin film, wherein the doped graphene thin film has a sheet resistance less than 150 ohms/square. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of making a coated article comprising a doped graphene thin film supported by a substrate, the method comprising:
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hetero-epitaxially growing an intermediate graphene thin film on a catalyst thin film, the catalyst thin film having a substantially single-orientation large-grain crystal structure, the intermediate graphene thin film being dopable with n-type and p-type dopants; and doping the intermediate graphene thin film with one of n-type and p-type dopants in making the doped graphene thin film. - View Dependent Claims (17)
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18. A method of making a coated article comprising a doped graphene thin film supported by a substrate, the method comprising:
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hetero-epitaxially growing an intermediate graphene thin film on a catalyst thin film, the catalyst thin film having a substantially single-orientation large-grain crystal structure, the intermediate graphene thin film being dopable with n-type and p-type dopants; and causing one of n-type and p-type solid-state dopants from a source below the intermediate graphene thin film to migrate into the intermediate graphene thin film, by thermal diffusion, in making the doped graphene thin film. - View Dependent Claims (19)
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Specification