Patents by Inventor Krzysztof Kempa

Krzysztof Kempa 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).

  • Publication number: 20200144429
    Abstract: Structures and methods for electron-hole photogeneration by plasmonic multiple exciton generation in light absorbing layers and solar cells are disclosed.
    Type: Application
    Filed: November 1, 2018
    Publication date: May 7, 2020
    Applicant: The Trustees of Boston College
    Inventors: Michael J. Naughton, Krzysztof Kempa
  • Patent number: 9708712
    Abstract: A method for the production of a transparent conductor deposit on a substrate, the method comprising: providing a substrate formed from a first material; depositing a film of a second material on the substrate; causing the film to crack so as to provide a plurality of recesses; depositing a conductive material in the recesses; and removing the film from the substrate so as to yield a transparent conductive deposit on the substrate.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: July 18, 2017
    Inventors: David Carnahan, Krzysztof Kempa, Nolan Nicholas
  • Patent number: 9110055
    Abstract: A nanocoaxial sensor includes an outer conductor, an inner conductor, a dielectric material disposed between the outer and inner conductors, a nanocavity sized to allow target species to enter the nanocavity between the outer and inner conductors, and an active sensing element immobilized within the nanocavity on at least one of the inner or outer conductors. The active sensing element is adapted to selectively capture the at least one of the target species.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: August 18, 2015
    Assignee: The Trustees of Boston College
    Inventors: Dong Cai, Thomas Chiles, Krzysztof Kempa, Michael Naughton, Zhifeng Ren, Paudel Trilochan
  • Publication number: 20140326697
    Abstract: A method for the production of a transparent conductor deposit on a substrate, the method comprising: providing a substrate formed from a first material; depositing a film of a second material on the substrate; causing the film to crack so as to provide a plurality of recesses; depositing a conductive material in the recesses; and removing the film from the substrate so as to yield a transparent conductive deposit on the substrate.
    Type: Application
    Filed: May 5, 2014
    Publication date: November 6, 2014
    Applicant: NanoLab, Inc.
    Inventors: David Carnahan, Krzysztof Kempa, Nolan Nicholas
  • Patent number: 8698267
    Abstract: An electrode includes a substantially planar metallic thin film layer with a patterned structure including a plurality of parallel lines or a plurality of crossed lines, the metallic thin film layer configured to transmit an incident light through the metallic thin film layer.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: April 15, 2014
    Assignee: South China Normal University
    Inventors: Yang Wang, Krzysztof Kempa, Zhifeng Ren
  • Publication number: 20120273915
    Abstract: An electrode includes a substantially planar metallic thin film layer with a patterned structure including a plurality of parallel lines or a plurality of crossed lines, the metallic thin film layer configured to transmit an incident light through the metallic thin film layer.
    Type: Application
    Filed: September 8, 2011
    Publication date: November 1, 2012
    Applicant: SOUTH CHINA NORMAL UNIVERSITY
    Inventors: Yang Wang, Krzysztof Kempa, Zhifeng Ren
  • Publication number: 20110287977
    Abstract: A nanocoaxial sensor includes an outer conductor, an inner conductor, a dielectric material disposed between the outer and inner conductors, a nanocavity sized to allow target species to enter the nanocavity between the outer and inner conductors, and an active sensing element immobilized within the nanocavity on at least one of the inner or outer conductors. The active sensing element is adapted to selectively capture the at least one of the target species.
    Type: Application
    Filed: November 16, 2007
    Publication date: November 24, 2011
    Inventors: Dong Cai, Thomas Chiles, Krzysztof Kempa, Michael Naughton, Zhifeng Ren, Paudel Trilochan
  • Publication number: 20090007956
    Abstract: A photovoltaic device includes a plurality of photovoltaic cells. Each photovoltaic cell of the plurality of photovoltaic cells includes a first electrode, a second electrode which is shared with at least one adjacent photovoltaic cell, and a photovoltaic material located between and in electrical contact with the first and the second electrodes. A thickness of the second electrode in a direction from one photovoltaic cell to an adjacent photovoltaic cell is less than an optical skin depth of the second electrode material, and a separation between first electrodes of adjacent photovoltaic cells is less than a peak wavelength of incident radiation.
    Type: Application
    Filed: July 2, 2008
    Publication date: January 8, 2009
    Inventors: Krzysztof Kempa, Michael Naughton
  • Publication number: 20080202581
    Abstract: A photovoltaic cell includes a first electrode, a first nanoparticle layer located in contact with the first electrode, a second electrode, a second nanoparticle layer located in contact with the second electrode, and a thin film photovoltaic material located between and in contact with the first and the second nanoparticle layers.
    Type: Application
    Filed: February 11, 2008
    Publication date: August 28, 2008
    Inventor: Krzysztof Kempa
  • Publication number: 20080178924
    Abstract: A photovoltaic cell includes a first electrode, a second electrode, and a photovoltaic material located between and in electrical contact with the first and the second electrodes. The photovoltaic material comprises i) semiconductor nanocrystals having a bang gap that is significantly smaller than peak solar radiation energy to exhibit a multiple exciton effect in response to irradiation by the solar radiation; and/or ii) a first and a second set of semiconductor nanocrystals and the nanocrystals of the first set have a different band gap energy than the nanocrystals of the second set. A width of the photovoltaic material in a direction from the first electrode to the second electrode is less than about 200 nm while a height of the photovoltaic material in a direction substantially perpendicular to the width of the photovoltaic material is at least 1 micron.
    Type: Application
    Filed: January 29, 2008
    Publication date: July 31, 2008
    Inventors: Krzysztof Kempa, Michael Naughton, Zhifeng Ren
  • Publication number: 20070240757
    Abstract: The present invention discloses a solar cell comprising a nanostructure array capable of accepting energy and producing electricity. In an embodiment, the solar cell comprises an at least one optical antenna having a geometric morphology capable of accepting energy. In addition, the cell comprises a rectifier having the optical antenna at a first end and engaging a substrate at a second end wherein the rectifier comprises the optical antenna engaged to a rectifying material (such as, a semiconductor). In addition, an embodiment of the solar cell comprises a metal layer wherein the metal layer surrounds a length of the rectifier, wherein the optical antenna accepts energy and converts the energy from AC to DC along the rectifier. Further, the invention provides various methods of efficiently and reliably producing such solar cells.
    Type: Application
    Filed: October 14, 2005
    Publication date: October 18, 2007
    Inventors: Zhifeng Ren, Krzysztof Kempa, Yang Wang
  • Publication number: 20070137697
    Abstract: An apparatus and methods for solar conversion using nanoscale cometal structures are disclosed herein. The cometal structures may be coaxial and coplanar. A nanoscale optics apparatus for use as a solar cell comprises a plurality of nanoscale cometal structures each including a photovoltaic material located between a first electrical conductor and a second electrical conductor. A method of fabricating solar cells comprises preparing a plurality of nanoscale planar structures; coating a plurality of planar surfaces of the plurality of planar structures with a photovoltaic semiconductor while leaving space between the plurality of planar surfaces; and coating the photovoltaic semiconductor with an outer electrical conductor layer, wherein a portion of the outer electrical conductor layer is located between the planar structures to form coplanar structures.
    Type: Application
    Filed: August 24, 2006
    Publication date: June 21, 2007
    Inventors: Krzysztof Kempa, Michael Naughton, Zhifeng Ren, Jakub Rybczynski
  • Publication number: 20070138376
    Abstract: Nanoscale optical probes for use with nanoscale optical microscopy are disclosed herein. A nanoscale optical probe for use with a near-field scanning optical microscope includes an inner conductor having a top end, a bottom end, and a body; a dielectric material engaging the inner conductor; and an outer conductor engaging the dielectric material, wherein the inner conductor is longer at a tip surface of the probe than the dielectric material and the outer conductor.
    Type: Application
    Filed: August 24, 2006
    Publication date: June 21, 2007
    Inventors: Michael Naughton, Krzysztof Kempa, Zhifeng Ren
  • Publication number: 20070105240
    Abstract: An apparatus and methods for nanolithography using nanoscale optics are disclosed herein. Submicron-scale structures may be obtained using standard photolithography systems with a de-magnifying lens. A de-magnifying lens for use in a standard photolithography system includes a film having a top surface, a bottom surface and a plurality of cylindrical channels containing a dielectric material; and an array of carbon nanotubes penetrating the film through the plurality of cylindrical channels, wherein an image on the top surface of the film is converted into a de-magnified image on the bottom surface of the film by the carbon nanotubes.
    Type: Application
    Filed: August 24, 2006
    Publication date: May 10, 2007
    Inventors: Krzysztof Kempa, Michael Naughton, Zhifeng Ren, Jakub Rybczynski
  • Publication number: 20070107103
    Abstract: An apparatus and methods for manipulating light using nanoscale cometal structures are disclosed. A nanoscale optics apparatus for manipulating light includes a plurality of nanoscale cometal structures each comprising a dielectric material located between a first electrical conductor and a second electrical conductor. A method of fabricating a nanoscale optics apparatus for manipulating light includes preparing a plurality of nanoscale planar structures; coating a plurality of planar surfaces of the plurality of planar structures with a dielectric while leaving space between the plurality of planar surfaces; and coating the dielectric with an outer electrical conductor layer, wherein a portion of the outer electrical conductor layer is located between the planar structures to form coplanar structures.
    Type: Application
    Filed: August 24, 2006
    Publication date: May 10, 2007
    Inventors: Krzysztof Kempa, Michael Naughton, Zhifeng Ren, Jakub Rybczynski
  • Publication number: 20070081242
    Abstract: An apparatus and methods for optical switching using nanoscale optics are disclosed herein. A nano-optics apparatus for use as an optical switch includes a metallic film having a top surface, a bottom surface and a plurality of cylindrical channels containing a dielectric material, the metallic film acting as an outer electrode; and an array of non-linear optical components penetrating the metallic film through the plurality of cylindrical channels, the array acting as an array of inner electrodes.
    Type: Application
    Filed: August 24, 2006
    Publication date: April 12, 2007
    Inventors: Krzysztof Kempa, Zhifeng Ren, Michael Naughton, Jakub Rybczynski
  • Publication number: 20070047056
    Abstract: An apparatus and method for solar conversion using nanocoax structures are disclosed herein. A nano-optics apparatus for use as a solar cell comprising a plurality of nano-coaxial structures comprising an internal conductor surrounded by a semiconducting material coated with an outer conductor; a film having the plurality of nano-coaxial structures; and a protruding portion of the an internal conductor extending beyond a surface of the film. A method of fabricating a solar cell comprising: coating a substrate with a catalytic material; growing a plurality of carbon nanotubes as internal cores of nanocoax units on the substrate; oxidizing the substrate; coating with a semiconducting film; and filling with a metallic medium that wets the semiconducting film of the nanocoax units.
    Type: Application
    Filed: April 10, 2006
    Publication date: March 1, 2007
    Inventors: Krzysztof Kempa, Michael Naughton, Zhifeng Ren, Yang Wang, Jakub Rybczynski
  • Patent number: 5417494
    Abstract: A method and system for probing a volume of material by detecting local conductivity in the material using microwave radiation. The probed volume of material is exposed to microwave radiation of a wavelength selected to excite the carriers of electrical current and induce localized heating in regions of the volume of material which is an electronic material or a device. A thermographic imaging system detects size and distribution of the locally heated regions, and a processing system determines a selected property of the material by analyzing the size and distribution of the locally heated regions. The thermographic imaging system can be an infra-red imaging system which detects infra-red radiation emitted from the locally heated region, or it can be a system which deposits a thermally sensitive film onto a surface of the material and detects thermally induced changes in the deposited film caused by the transferred heat.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: May 23, 1995
    Assignee: Exid, Inc.
    Inventors: Krzysztof Kempa, Roman Litovsky