Patents by Inventor Gerasimos Konstantatos
Gerasimos Konstantatos 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: 20120100699Abstract: In an example embodiment, an optical device includes an integrated circuit, an array of conductive regions, and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region. In another example embodiment, a method of forming a nanocrystalline film includes fabricating nanocrystals having a plurality of first ligands attached to their outer surfaces, exchanging the first ligands for second ligands of a different chemical composition, forming a film of the ligand-exchanged nanocrystals, removing the second ligands, and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals. In another example embodiment, a film includes a network of fused nanocrystals with at least portions of the fused nanocrystals being in direct physical contact with adjacent nanocrystals, the film having substantially no defect states in regions where cores of the nanocrystals are fused.Type: ApplicationFiled: September 23, 2011Publication date: April 26, 2012Applicant: InVisage Technologies, Inc.Inventors: Edward Sargent, Gerasimos Konstantatos, Larissa Levina, Ian Howard, Ethan J.D. Klem, Jason Clifford
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Patent number: 8115232Abstract: The present invention provides of a three-dimensional bicontinuous heterostructure, a method of producing same, and the application of this structure towards the realization of photodetecting and photovoltaic devices working in the visible and the near-infrared. The three-dimensional bicontinuous heterostructure includes two interpenetrating layers which are spatially continuous, they are include only protrusions or peninsulas, and no islands. The method of producing the three-dimensional bicontinuous heterostructure relies on forming an essentially planar continuous bottom layer of a first material; forming a layer of this first material on top of the bottom layer which is textured to produce protrusions for subsequent interpenetration with a second material, coating this second material onto this structure; and forming a final coating with the second material that ensures that only the second material is contacted by subsequent layer.Type: GrantFiled: January 9, 2006Date of Patent: February 14, 2012Assignee: InVisage Technologies, Inc.Inventors: Edward Sargent, Steve McDonald, Shiguo Zhang, Larissa Levina, Gerasimos Konstantatos, Paul Cyr
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Patent number: 8102693Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: GrantFiled: August 6, 2010Date of Patent: January 24, 2012Assignee: InVisage Technologies, Inc.Inventors: Edward Sargent, Jason Clifford, Gerasimos Konstantatos, Ian Howard, Ethan J. D. Klem, Larissa Levina
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Publication number: 20110315959Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: ApplicationFiled: September 7, 2011Publication date: December 29, 2011Applicant: InVisage Technologies, Inc.Inventors: Edward Sargent, Gerasimos Konstantatos, Larissa Levina, Ian Howard, Ethan J.D. Klem, Jason Clifford
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Patent number: 8054671Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: GrantFiled: May 14, 2010Date of Patent: November 8, 2011Assignee: InVisage Technologies, Inc.Inventors: Edward Sargent, Gerasimos Konstantatos, Larissa Levina, Ian Howard, Ethan J. D. Klem, Jason Clifford
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Publication number: 20110240106Abstract: Photovoltaic cells are fabricated in which the compositions of the light-absorbing layer and the electron-accepting layer are selected such that at least one side of the junction between these two layers is substantially depleted of charge carriers, i.e., both free electrons and free holes, in the absence of solar illumination. In further aspects of the invention, the light-absorbing layer is comprised of dual-shell passivated quantum dots, each having a quantum dot core with surface anions, an inner shell containing cations to passivate the core surface anions, and an outer shell to passivate the inner shell anions and anions on the core surface.Type: ApplicationFiled: September 27, 2010Publication date: October 6, 2011Applicant: The Governing Council of the University of TorontoInventors: Jiang Tang, Andras Pattantyus-Abraham, Illan Kramer, Aaron Barkhouse, Xihua Wang, Gerasimos Konstantatos, Ratan Debnath, Edward H. Sargent
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Patent number: 8023306Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: GrantFiled: May 14, 2010Date of Patent: September 20, 2011Assignee: InVisage Technologies, Inc.Inventors: Edward Sargent, Larissa Levina, Gerasimos Konstantatos, Ian Howard, Ethan J. D. Klem, Jason Clifford
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Patent number: 8022391Abstract: A composite material is described. The composite material comprises semiconductor nanocrystals, and organic molecules that passivate the surfaces of the semiconductor nanocrystals. One or more properties of the organic molecules facilitate the transfer of charge between the semiconductor nanocrystals. A semiconductor material is described that comprises p-type semiconductor material including semiconductor nanocrystals. At least one property of the semiconductor material results in a mobility of electrons in the semiconductor material being greater than or equal to a mobility of holes. A semiconductor material is described that comprises n-type semiconductor material including semiconductor nanocrystals. At least one property of the semiconductor material results in a mobility of holes in the semiconductor material being greater than or equal to a mobility of electrons.Type: GrantFiled: April 20, 2009Date of Patent: September 20, 2011Assignee: InVisage Technologies, Inc.Inventors: Edward Hartley Sargent, Ghada Koleilat, Jiang Tang, Keith William Johnston, Andras Geza Pattantyus-Abraham, Gerasimos Konstantatos, Ethan Jacob Dukenfield Klem, Stefan Myrskog, Dean Delehanty MacNeil, Jason Paul Clifford, Larissa Levina
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Patent number: 7881091Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: GrantFiled: February 27, 2009Date of Patent: February 1, 2011Assignee: InVisage Technologies. Inc.Inventors: Edward Sargent, Gerasimos Konstantatos, Larissa Levina, Ian Howard, Ethan J. D. Klem, Jason Clifford
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Publication number: 20100314529Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: ApplicationFiled: August 6, 2010Publication date: December 16, 2010Inventors: Edward Sargent, Jason Clifford, Gerasimos Konstantatos, Ian Howard, Ethan J.D. Klem, Larissa Levina
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Publication number: 20100317175Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: ApplicationFiled: May 14, 2010Publication date: December 16, 2010Inventors: Edward Sargent, Gerasimos Konstantatos, Larissa Levina, Ian Howard, Ethan J.D. Klem, Jason Clifford
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Publication number: 20100314603Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: ApplicationFiled: May 14, 2010Publication date: December 16, 2010Inventors: Edward Sargent, Gerasimos Konstantatos, Larissa Levina, Ian Howard, Ethan J.D. Klem, Jason Clifford
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Patent number: 7773404Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: GrantFiled: August 24, 2006Date of Patent: August 10, 2010Assignee: InVisage Technologies, Inc.Inventors: Edward Sargent, Jason Clifford, Gerasimos Konstantatos, Ian Howard, Ethan J. D. Klem, Larissa Levina
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Publication number: 20100187404Abstract: A photodetector is described along with corresponding materials, systems, and methods. The photodetector comprises an integrated circuit and at least two optically sensitive layers. A first optically sensitive layer is over at least a portion of the integrated circuit, and a second optically sensitive layer is over the first optically sensitive layer. Each optically sensitive layer is interposed between two electrodes. The two electrodes include a respective first electrode and a respective second electrode. The integrated circuit selectively applies a bias to the electrodes and reads signals from the optically sensitive layers. The signal is related to the number of photons received by the respective optically sensitive layer.Type: ApplicationFiled: March 19, 2010Publication date: July 29, 2010Inventors: Ethan Jacob Dukenfield Klem, Dean Delehanty Macneil, Gerasimos Konstantatos, Jiang Tang, Michael Charles Brading, Hui Tian, Edward Hartley Sargent
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Publication number: 20100187408Abstract: A photodetector is described along with corresponding materials, systems, and methods. The photodetector comprises an integrated circuit and at least two optically sensitive layers. A first optically sensitive layer is over at least a portion of the integrated circuit, and a second optically sensitive layer is over the first optically sensitive layer. Each optically sensitive layer is interposed between two electrodes. The two electrodes include a respective first electrode and a respective second electrode. The integrated circuit selectively applies a bias to the electrodes and reads signals from the optically sensitive layers. The signal is related to the number of photons received by the respective optically sensitive layer.Type: ApplicationFiled: March 19, 2010Publication date: July 29, 2010Inventors: Ethan Jacob Dukenfield Klem, Dean Delehanty Macneil, Gerasimos Konstantatos, Jiang Tang, Michael Charles Brading, Hui Tian, Edward Hartley Sargent
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Patent number: 7746681Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: GrantFiled: August 24, 2006Date of Patent: June 29, 2010Assignee: InVisage Technologies, Inc.Inventors: Edward Sargent, Gerasimos Konstantatos, Larissa Levina, Ian Howard, Ethan J. D. Klem, Jason Clifford
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Patent number: 7742322Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: GrantFiled: August 24, 2006Date of Patent: June 22, 2010Assignee: InVisage Technologies, Inc.Inventors: Edward Sargent, Gerasimos Konstantatos, Larissa Levina, Ian Howard, Ethan J. D. Klem, Jason Clifford
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Publication number: 20100133418Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: ApplicationFiled: August 24, 2006Publication date: June 3, 2010Inventors: Edward Sargent, Jason Clifford, Gerasimos Konstantatos, Ian Howard, Ethan J.D. Klem, Larissa Levina
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Publication number: 20100044676Abstract: A composite material is described. The composite material comprises semiconductor nanocrystals, and organic molecules that passivate the surfaces of the semiconductor nanocrystals. One or more properties of the organic molecules facilitate the transfer of charge between the semiconductor nanocrystals. A semiconductor material is described that comprises p-type semiconductor material including semiconductor nanocrystals. At least one property of the semiconductor material results in a mobility of electrons in the semiconductor material being greater than or equal to a mobility of holes. A semiconductor material is described that comprises n-type semiconductor material including semiconductor nanocrystals. At least one property of the semiconductor material results in a mobility of holes in the semiconductor material being greater than or equal to a mobility of electrons.Type: ApplicationFiled: April 20, 2009Publication date: February 25, 2010Applicant: InVisage Technologies, Inc.Inventors: Edward Hartley Sargent, Ghada Koleilat, Jiang Tang, Keith William Johnston, Andras Geza Pattantyus-Abraham, Gerasimos Konstantatos, Ethan Jacob Dukenfield Klem, Stefan Myrskog, Dean Delehanty MacNeil, Jason Paul Clifford, Larissa Levina
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Publication number: 20090305452Abstract: Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals.Type: ApplicationFiled: February 27, 2009Publication date: December 10, 2009Inventors: Edward Sargent, Gerasimos Konstantatos, Larissa Levina, Ian Howard, Ethan J.D. Klem, Jason Clifford