Patents by Inventor David Bruce Geohegan
David Bruce Geohegan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20170098514Abstract: Methods for humidity-driven crystallization of hybrid perovskite films as well as the resulting hybrid perovskite films are provided. Hybrid perovskite films can be made by sequentially depositing respective layers of inorganic and organic hybrid perovskite precursors onto a substrate to form a hybrid perovskite film precursor. The hybrid perovskite film precursor can then be exposed to a humidified atmosphere so as to convert the inorganic and organic hybrid perovskite precursors to the hybrid perovskite. The processing desirably results in a void-free hybrid perovskite film. Humidity exposure processing methods can be the enabling step in the formation of large grain size (above 1 micrometer) for building vertical bulk-heterojunction structures through the infiltration of different media in vertical grain-boundaries.Type: ApplicationFiled: October 5, 2016Publication date: April 6, 2017Applicant: UT-BATTELLE, LLCInventors: David Bruce GEOHEGAN, Jong Kahk KEUM, Jonathan D. POPLAWSKY, Kai XIAO, Bin YANG, Ondrej Edward DYCK
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Publication number: 20140042373Abstract: The present invention, in one embodiment, provides a method of forming an organic electric device that includes providing a plurality of carbon nanostructures; and dispersing the plurality of carbon nanostructures in a polymeric matrix to provide a polymeric composite, wherein when the plurality of carbon nanostructures are present at a first concentration an interface of the plurality of carbon nanostructures and the polymeric matrix is characterized by charge transport when an external energy is applied, and when the plurality of carbon nanostructures are present at a second concentration the interface of the plurality of carbon nanostructures and the polymeric matrix are characterized by exciton dissociation when an external energy is applied, wherein the first concentration is less than the second concentration.Type: ApplicationFiled: September 9, 2013Publication date: February 13, 2014Applicants: University of Tennessee Research Foundation, UT-BATTELLE LLCInventors: David Bruce Geohegan, Ilia N. Ivanov, Alexander A. Puretzky, Stephen Jesse, Bin Hu, Matthew Garrett, Bin Zhao
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Patent number: 8568027Abstract: The present invention, in one embodiment, provides a method of measuring pressure or temperature using a sensor including a sensor element composed of a plurality of carbon nanotubes. In one example, the resistance of the plurality of carbon nanotubes is measured in response to the application of temperature or pressure. The changes in resistance are then recorded and correlated to temperature or pressure. In one embodiment, the present invention provides for independent measurement of pressure or temperature using the sensors disclosed herein.Type: GrantFiled: August 26, 2009Date of Patent: October 29, 2013Assignee: UT-Battelle, LLCInventors: Ilia N. Ivanov, David Bruce Geohegan
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Patent number: 8540542Abstract: The present invention, in one embodiment, provides a method of forming an organic electric device that includes providing a plurality of carbon nanostructures; and dispersing the plurality of carbon nanostructures in a polymeric matrix to provide a polymeric composite, wherein when the plurality of carbon nanostructures are present at a first concentration an interface of the plurality of carbon nanostructures and the polymeric matrix is characterized by charge transport when an external energy is applied, and when the plurality of carbon nanostructures are present at a second concentration the interface of the plurality of carbon nanostructures and the polymeric matrix are characterized by exciton dissociation when an external energy is applied, wherein the first concentration is less than the second concentration.Type: GrantFiled: April 8, 2011Date of Patent: September 24, 2013Assignees: UT-Battelle, LLC, University of Tennessee Research FoundationInventors: David Bruce Geohegan, Ilia N. Ivanov, Alexander A. Puretzky, Stephen Jesse, Bin Hu, Matthew Garrett, Bin Zhao
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Publication number: 20110212554Abstract: The present invention, in one embodiment, provides a method of forming an organic electric device that includes providing a plurality of carbon nanostructures; and dispersing the plurality of carbon nanostructures in a polymeric matrix to provide a polymeric composite, wherein when the plurality of carbon nanostructures are present at a first concentration an interface of the plurality of carbon nanostructures and the polymeric matrix is characterized by charge transport when an external energy is applied, and when the plurality of carbon nanostructures are present at a second concentration the interface of the plurality of carbon nanostructures and the polymeric matrix are characterized by exciton dissociation when an external energy is applied, wherein the first concentration is less than the second concentration.Type: ApplicationFiled: April 8, 2011Publication date: September 1, 2011Applicants: UT-BATTELLE LLC, UNIVERSITY OF TENNESSEE RESEARCH FOUNDATIONInventors: David Bruce Geohegan, Ilia N. Ivanov, Alexander A. Puretzky, Stephen Jesse, Bin Hu, Matthew Garrett, Bin Zhao
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Patent number: 7923922Abstract: The present invention, in one embodiment, provides a method of forming an organic electric device that includes providing a plurality of carbon nanostructures; and dispersing the plurality of carbon nanostructures in a polymeric matrix to provide a polymeric composite, wherein when the plurality of carbon nanostructures are present at a first concentration an interface of the plurality of carbon nanostructures and the polymeric matrix is characterized by charge transport when an external energy is applied, and when the plurality of carbon nanostructures are present at a second concentration the interface of the plurality of carbon nanostructures and the polymeric matrix are characterized by exciton dissociation when an external energy is applied, wherein the first concentration is less than the second concentration.Type: GrantFiled: December 27, 2007Date of Patent: April 12, 2011Assignee: UT-Battelle, LLCInventors: David Bruce Geohegan, Ilia N. Ivanov, Alexander A. Puretzky, Stephen Jesse, Bin Hu, Matthew Garrett, Bin Zhao
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Publication number: 20110051775Abstract: The present invention, in one embodiment, provides a method of measuring pressure or temperature using a sensor including a sensor element composed of a plurality of carbon nanotubes. In one example, the resistance of the plurality of carbon nanotubes is measured in response to the application of temperature or pressure. The changes in resistance are then recorded and correlated to temperature or pressure. In one embodiment, the present invention provides for independent measurement of pressure or temperature using the sensors disclosed herein.Type: ApplicationFiled: August 26, 2009Publication date: March 3, 2011Applicant: UT-BATTELLE, LLCInventors: Ilia N. Ivanov, David Bruce Geohegan
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Publication number: 20080191606Abstract: The present invention, in one embodiment, provides a method of forming an organic electric device that includes providing a plurality of carbon nanostructures; and dispersing the plurality of carbon nanostructures in a polymeric matrix to provide a polymeric composite, wherein when the plurality of carbon nanostructures are present at a first concentration an interface of the plurality of carbon nanostructures and the polymeric matrix is characterized by charge transport when an external energy is applied, and when the plurality of carbon nanostructures are present at a second concentration the interface of the plurality of carbon nanostructures and the polymeric matrix are characterized by exciton dissociation when an external energy is applied, wherein the first concentration is less than the second concentration.Type: ApplicationFiled: December 27, 2007Publication date: August 14, 2008Inventors: David Bruce Geohegan, Ilya N. Ivanov, Alexander A. Puretzky, Stephen Jesse, Bin Hu