Patents by Inventor Sumit Chaudhary
Sumit Chaudhary 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: 20180219158Abstract: A method of fabricating an organic photovoltaic device. The method includes providing a first electrode which by applying a layer of conductive material onto a transparent substrate. The conductive material forms the first electrode. The method also includes placing an active layer of organic photovoltaic material on top of the first electrode. The active layer is configured to convert photonic energy into electrical energy. Placing an active layer of organic photovoltaic material includes placing an active layer of organic photovoltaic material having ferroelectric dipoles dispersed therein. The method further includes applying a second electrode on top of the active layer of organic photovoltaic material.Type: ApplicationFiled: March 26, 2018Publication date: August 2, 2018Applicant: Iowa State University Research Foundation, Inc.Inventors: Kanwar Singh Nalwa, Sumit Chaudhary
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Patent number: 10038142Abstract: A method of fabricating an organic photovoltaic device. The method includes providing a first electrode which by applying a layer of conductive material onto a transparent substrate. The conductive material forms the first electrode. The method also includes placing an active layer of organic photovoltaic material on top of the first electrode. The active layer is configured to convert photonic energy into electrical energy. Placing an active layer of organic photovoltaic material includes placing an active layer of organic photovoltaic material having ferroelectric dipoles dispersed therein. The method further includes applying a second electrode on top of the active layer of organic photovoltaic material.Type: GrantFiled: March 26, 2018Date of Patent: July 31, 2018Assignee: Iowa State University Research Foundation, Inc.Inventors: Kanwar Singh Nalwa, Sumit Chaudhary
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Patent number: 9966533Abstract: A method of fabricating an organic photovoltaic device. The method includes providing a first electrode which by applying a layer of conductive material onto a transparent substrate. The conductive material forms the first electrode. The method also includes placing an active layer of organic photovoltaic material on top of the first electrode. The active layer is configured to convert photonic energy into electrical energy. Placing an active layer of organic photovoltaic material includes placing an active layer of organic photovoltaic material having ferroelectric dipoles dispersed therein. The method further includes applying a second electrode on top of the active layer of organic photovoltaic material.Type: GrantFiled: February 28, 2013Date of Patent: May 8, 2018Assignee: Iowa State University Research Foundation, Inc.Inventors: Kanwar Singh Nalwa, Sumit Chaudhary
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Patent number: 9401442Abstract: A three-dimensional, microscale-textured, grating-shaped organic solar cell geometry. The solar cells are fabricated on gratings to give them a three-dimensional texture that provides enhanced light absorption. Introduction of microscale texturing has a positive effect on the overall power conversion efficiency of the devices. This grating-based solar cell having a grating of pre-determined pitch and height has shown improved power-conversion efficiency over a conventional flat solar cell. The improvement in efficiency is accomplished by homogeneous coverage of the grating with uniform thickness of the active layer, which is attributed to a sufficiently high pitch and low height of the underlying gratings. Also the microscale texturing leads to suppressed reflection of incident light due to the efficient coupling of the incident light into modes that are guided in the active layer.Type: GrantFiled: September 1, 2011Date of Patent: July 26, 2016Assignee: Iowa State University Research Foundation, Inc.Inventors: Sumit Chaudhary, Kai-Ming Ho, Joong-Mok Park, Kanwar Singh Nalwa, Wai Y. Leung
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Publication number: 20130230942Abstract: A method of fabricating an organic photovoltaic device. The method includes providing a first electrode which by applying a layer of conductive material onto a transparent substrate. The conductive material forms the first electrode. The method also includes placing an active layer of organic photovoltaic material on top of the first electrode. The active layer is configured to convert photonic energy into electrical energy. Placing an active layer of organic photovoltaic material includes placing an active layer of organic photovoltaic material having ferroelectric dipoles dispersed therein. The method further includes applying a second electrode on top of the active layer of organic photovoltaic material.Type: ApplicationFiled: February 28, 2013Publication date: September 5, 2013Applicant: Iowa State University Research Foundation, Inc.Inventors: Kanwar Singh Nalwa, Sumit Chaudhary
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Publication number: 20120048368Abstract: A three-dimensional, microscale-textured, grating-shaped organic solar cell geometry. The solar cells are fabricated on gratings to give them a three-dimensional texture that provides enhanced light absorption. Introduction of microscale texturing has a positive effect on the overall power conversion efficiency of the devices. This grating-based solar cell having a grating of pre-determined pitch and height has shown improved power-conversion efficiency over a conventional flat solar cell. The improvement in efficiency is accomplished by homogeneous coverage of the grating with uniform thickness of the active layer, which is attributed to a sufficiently high pitch and low height of the underlying gratings. Also the microscale texturing leads to suppressed reflection of incident light due to the efficient coupling of the incident light into modes that are guided in the active layer.Type: ApplicationFiled: September 1, 2011Publication date: March 1, 2012Applicant: IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.Inventors: Sumit Chaudhary, Kai-Ming Ho, Joong-Mok Park, Kanwar Singh Nalwa, Wai Y. Leung
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Publication number: 20120031487Abstract: Nanoscale high-aspect-ratio metallic structures and methods are presented. Such structures may form transparent electrode to enhance the performance of solar cells and light-emitting diodes. These structures can be used as infrared control filters because they reflect high amounts of infrared radiation. A grating structure of polymeric bars affixed to a transparent substrate is used. The sides of the bars are coated with metal forming nanowires. Electrodes may be configured to couple to a subset of the rails forming interdigitated electrodes. Encapsulation is used to improve transparency and transparency at high angles. The structure may be inverted to facilitate fabrication of a solar cell or other device on the back-side of the structure. Multiple layered electrodes having an active layer sandwiched between two conductive layers may be used. Layered electro-active layers may be used to form a smart window where the structure is encapsulated between glass to modify the incoming light.Type: ApplicationFiled: October 17, 2011Publication date: February 9, 2012Applicant: IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.Inventors: Ping Kuang, Joong-Mok Park, Wai Leung, Kai-Ming Ho, Kristen P. Constant, Sumit Chaudhary
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Publication number: 20110203656Abstract: Nanoscale high-aspect-ratio metallic structures and methods are presented. Such structures may form transparent electrode to enhance the performance of solar cells and light-emitting diodes. These structures can be used as infrared control filters because they reflect high amounts of infrared radiation. A grating structure of polymeric bars affixed to a transparent substrate is used. The sides of the bars are coated with metal forming nanowires. Electrodes may be configured to couple to a subset of the rails forming interdigitated electrodes. Encapsulation is used to improve transparency and transparency at high angles. The structure may be inverted to facilitate fabrication of a solar cell or other device on the back-side of the structure. Multiple layered electrodes having an active layer sandwiched between two conductive layers may be used. Layered electro-active layers may be used to form a smart window where the structure is encapsulated between glass to modify the incoming light.Type: ApplicationFiled: February 14, 2011Publication date: August 25, 2011Applicant: IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.Inventors: Ping Kuang, Joong-Mok Park, Wai Leung, Kai-Ming Ho, Kristen P. Constant, Sumit Chaudhary
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Patent number: 7132787Abstract: Disclosed herein are multilayer polymer-quantum dot light emitting diodes (PQD-LEDs) and methods of making thereof. As disclosed, the PQD-LEDs comprise at least one quantum dot layer made from an aqueous suspension of quantum dots upon which a polymer layer is deposited by spin coating methods known in the art. The quantum dot layers and the polymer layers are discrete and distinct from one another. Also disclosed are methods of making the PQD-LEDs of the present invention and kits.Type: GrantFiled: November 20, 2003Date of Patent: November 7, 2006Assignee: The Regents of the University of CaliforniaInventors: Mihri Ozkan, Sumit Chaudhary
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Publication number: 20050001538Abstract: Disclosed herein are multilayer polymer-quantum dot light emitting diodes (PQD-LEDs) and methods of making thereof. As disclosed, the PQD-LEDs comprise at least one quantum dot layer made from an aqueous suspension of quantum dots upon which a polymer layer is deposited by spin coating methods known in the art. The quantum dot layers and the polymer layers are discrete and distinct from one another. Also disclosed are methods of making the PQD-LEDs of the present invention and kits.Type: ApplicationFiled: November 20, 2003Publication date: January 6, 2005Inventors: Mihri Ozkan, Sumit Chaudhary