Patents by Inventor Philip T. Chiu

Philip T. Chiu 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: 20190149090
    Abstract: A quantum efficiency test controller (QETC) and related techniques for measuring quantum efficiency are described. The QETC performs one or more test iterations to obtain test results regarding quantum efficiency of a multijunction photovoltaic device (MPD) having a number N of photovoltaic junctions (N>0), where the QETC is associated with N bias light sources. During a test iteration, the QETC activates a grating monochromator to emit a first test probe of monochromatic light at a first wavelength; and while the grating monochromator is emitting the first test probe, iterates through and activates each of the N bias light sources to emit a corresponding bias band of wavelengths of light. After performing the test iteration(s), the QETC generates an output that is based on the test results related to the quantum efficiency of the MPD.
    Type: Application
    Filed: November 11, 2017
    Publication date: May 16, 2019
    Inventors: Philip T. Chiu, Dimitri D. Krut
  • Patent number: 10230012
    Abstract: Systems, methods, and apparatus for light collection and conversion to electricity are disclosed herein. The disclosed method involves receiving, by at least one concentrating element (e.g., a lens), light from at least one light source, where the light comprises direct light and diffuse light. The method further involves focusing, by at least one concentrating element, the direct light onto at least one concentrator photovoltaic cell. Also, the method involves passing, by at least one concentrating element, the diffuse light onto at least one solar cell of an array of solar cells arranged on a flat plate, where at least one concentrator photovoltaic cell is bonded on top of at least one of the solar cells in the array. In addition, the method involves collecting, by at least one concentrator photovoltaic cell, the direct light. Further, the method involves collecting, by at least one solar cell, the diffuse light.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: March 12, 2019
    Assignee: The Boeing Company
    Inventors: Richard R. King, Philip T. Chiu, Nasser H. Karam
  • Patent number: 10128793
    Abstract: An apparatus and methods for compensating for spatial non-uniformities in solar simulators. This is accomplished in part by acquiring a spatial map of the intensity distribution that the solar simulator produces across the illumination plane using a reference cell, identifying an area of an arbitrary solar cell within the illuminated area, and then calculating the expected illumination levels for that solar cell in that specific location based on the spatial mapping. The results of that process can then be used to determine the efficiency of the arbitrary solar cell during a test in which the reference cell (of known efficiency), located in a different part of the illuminating beam, simultaneously measures the illumination in one area of the illumination beam.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: November 13, 2018
    Assignee: The Boeing Company
    Inventors: Douglas R. Jungwirth, Philip T. Chiu, Ricardo Anaya
  • Patent number: 9954128
    Abstract: The present disclosure generally relates to a solar cell device that a first Bragg reflector disposed below a first solar cell and a second Bragg reflector disposed below the first Bragg reflector, wherein the first solar cell comprises a dilute nitride composition and has a first bandgap, wherein the first Bragg reflector is operable to reflect a first range of radiation wavelengths back into the first solar cell and the second Bragg reflector is operable to reflect a third range of wavelengths back into the first solar cell, and the first Bragg reflector and the second Bragg reflector are operable to cool the solar cell device by reflecting a second range of radiation wavelengths that are outside the photogeneration wavelength range of the first solar cell or that are weakly absorbed by the first solar cell.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: April 24, 2018
    Assignee: THE BOEING COMPANY
    Inventors: Richard R. King, Moran Haddad, Philip T. Chiu, Xingquan Liu, Christopher M. Fetzer
  • Publication number: 20170200845
    Abstract: The present disclosure generally relates to a solar cell device that a first Bragg reflector disposed below a first solar cell and a second Bragg reflector disposed below the first Bragg reflector, wherein the first solar cell comprises a dilute nitride composition and has a first bandgap, wherein the first Bragg reflector is operable to reflect a first range of radiation wavelengths back into the first solar cell and the second Bragg reflector is operable to reflect a third range of wavelengths back into the first solar cell, and the first Bragg reflector and the second Bragg reflector are operable to cool the solar cell device by reflecting a second range of radiation wavelengths that are outside the photogeneration wavelength range of the first solar cell or that are weakly absorbed by the first solar cell.
    Type: Application
    Filed: January 12, 2016
    Publication date: July 13, 2017
    Inventors: Richard R. King, Moran Haddad, Philip T. Chiu, Xingquan Liu, Christopher M. Fetzer
  • Publication number: 20170200849
    Abstract: The present disclosure generally relates to a solar cell device that includes a substrate comprising a front side surface and a backside surface; an epitaxial region overlying the substrate, wherein the epitaxial region comprises a first Bragg reflector disposed below a first solar cell, wherein the first solar cell has a first bandgap, wherein the first Bragg reflector is operable to reflect a first range of radiation wavelengths back into the first solar cell, and is operable to cool the solar cell device by reflecting a second range of radiation wavelengths that are outside the photogeneration wavelength range of the first solar cell or that are weakly absorbed by the first solar cell, and may additionally comprise a second Bragg reflector operable to reflect a third range of radiation wavelengths back into the first solar cell.
    Type: Application
    Filed: January 12, 2016
    Publication date: July 13, 2017
    Inventors: Richard R. King, Moran Haddad, Philip T. Chiu, Xingquan Liu, Christopher M. Fetzer
  • Patent number: 9689540
    Abstract: An apparatus and methods for retrofitting known solar simulator systems to allow the exit beam to be changed in size and location without changing the other fundamental functions of the main optical elements. The solar simulator system is provided with means for de-magnifying the exit beam to provide higher power densities at the illumination plane. By adding or replacing one final optical element, the system user can change the location of the illumination plane and the size of the illumination area. This change in size can increase or decrease the power density of the exit beam.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: June 27, 2017
    Assignee: The Boeing Company
    Inventors: Douglas R. Jungwirth, Philip T. Chiu
  • Publication number: 20170141726
    Abstract: An apparatus and methods for compensating for spatial non-uniformities in solar simulators. This is accomplished in part by acquiring a spatial map of the intensity distribution that the solar simulator produces across the illumination plane using a reference cell, identifying an area of an arbitrary solar cell within the illuminated area, and then calculating the expected illumination levels for that solar cell in that specific location based on the spatial mapping. The results of that process can then be used to determine the efficiency of the arbitrary solar cell during a test in which the reference cell (of known efficiency), located in a different part of the illuminating beam, simultaneously measures the illumination in one area of the illumination beam.
    Type: Application
    Filed: January 4, 2016
    Publication date: May 18, 2017
    Applicant: The Boeing Company
    Inventors: Douglas R. Jungwirth, Philip T. Chiu, Ricardo Anaya
  • Publication number: 20170084771
    Abstract: A tunnel junction for a semiconductor device is disclosed. The tunnel junction includes a n-doped tunnel layer and a p-doped tunnel layer. The p-doped tunnel layer is constructed of aluminum gallium arsenide antimonide (AlGaAsSb). A semiconductor device including the tunnel junction with the p-doped tunnel layer constructed of AlGaAsSb is also disclosed.
    Type: Application
    Filed: September 21, 2015
    Publication date: March 23, 2017
    Inventors: Philip T. Chiu, Moran Haddad, Richard R. King
  • Publication number: 20170062630
    Abstract: Systems, methods, and apparatus for light collection and conversion to electricity are disclosed herein. The disclosed method involves receiving, by at least one concentrating element (e.g., a lens), light from at least one light source, where the light comprises direct light and diffuse light. The method further involves focusing, by at least one concentrating element, the direct light onto at least one concentrator photovoltaic cell. Also, the method involves passing, by at least one concentrating element, the diffuse light onto at least one solar cell of an array of solar cells arranged on a flat plate, where at least one concentrator photovoltaic cell is bonded on top of at least one of the solar cells in the array. In addition, the method involves collecting, by at least one concentrator photovoltaic cell, the direct light. Further, the method involves collecting, by at least one solar cell, the diffuse light.
    Type: Application
    Filed: August 27, 2015
    Publication date: March 2, 2017
    Inventors: Richard R. King, Philip T. Chiu, Nasser H. Karam
  • Publication number: 20160327224
    Abstract: An apparatus and methods for retrofitting known solar simulator systems to allow the exit beam to be changed in size and location without changing the other fundamental functions of the main optical elements. The solar simulator system is provided with means for de-magnifying the exit beam to provide higher power densities at the illumination plane. By adding or replacing one final optical element, the system user can change the location of the illumination plane and the size of the illumination area. This change in size can increase or decrease the power density of the exit beam.
    Type: Application
    Filed: May 5, 2015
    Publication date: November 10, 2016
    Applicant: The Boeing Company
    Inventors: Douglas R. Jungwirth, Philip T. Chiu
  • Patent number: 9368671
    Abstract: A method of fabricating on a semiconductor substrate bifacial tandem solar cells with semiconductor subcells having a lower bandgap than the substrate bandgap on one side of the substrate and with subcells having a higher bandgap than the substrate on the other including, first, growing a lower bandgap subcell on one substrate side that uses only the same periodic table group V material in the dislocation-reducing grading layers and bottom subcells as is present in the substrate and after the initial growth is complete and then flipping the substrate and growing the higher bandgap subcells on the opposite substrate side which can be of different group V material.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: June 14, 2016
    Assignee: MASIMO SEMICONDUCTOR, INC.
    Inventors: Steven J. Wojtczuk, Philip T. Chiu, Xuebing Zhang, Edward Gagnon, Michael Timmons
  • Publication number: 20150099324
    Abstract: A method of fabricating on a semiconductor substrate bifacial tandem solar cells with semiconductor subcells having a lower bandgap than the substrate bandgap on one side of the substrate and with subcells having a higher bandgap than the substrate on the other including, first, growing a lower bandgap subcell on one substrate side that uses only the same periodic table group V material in the dislocation-reducing grading layers and bottom subcells as is present in the substrate and after the initial growth is complete and then flipping the substrate and growing the higher bandgap subcells on the opposite substrate side which can be of different group V material.
    Type: Application
    Filed: October 6, 2014
    Publication date: April 9, 2015
    Inventors: Steven J. Wojtczuk, Philip T. Chiu, Xuebing Zhang, Edward Gagnon, Michael Timmons
  • Patent number: 8852994
    Abstract: A method of fabricating on a semiconductor substrate bifacial tandem solar cells with semiconductor subcells having a lower bandgap than the substrate bandgap on one side of the substrate and with subcells having a higher bandgap than the substrate on the other including, first, growing a lower bandgap subcell on one substrate side that uses only the same periodic table group V material in the dislocation-reducing grading layers and bottom subcells as is present in the substrate and after the initial growth is complete and then flipping the substrate and growing the higher bandgap subcells on the opposite substrate side which can be of different group V material.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: October 7, 2014
    Assignee: Masimo Semiconductor, Inc.
    Inventors: Steven J. Wojtczuk, Philip T. Chiu, Xuebing Zhang, Edward Gagnon, Michael Timmons
  • Publication number: 20110287578
    Abstract: A method of fabricating on a semiconductor substrate bifacial tandem solar cells with semiconductor subcells having a lower bandgap than the substrate bandgap on one side of the substrate and with subcells having a higher bandgap than the substrate on the other including, first, growing a lower bandgap subcell on one substrate side that uses only the same periodic table group V material in the dislocation-reducing grading layers and bottom subcells as is present in the substrate and after the initial growth is complete and then flipping the substrate and growing the higher bandgap subcells on the opposite substrate side which can be of different group V material.
    Type: Application
    Filed: May 24, 2010
    Publication date: November 24, 2011
    Inventors: Steven J. Wojtczuk, Philip T. Chiu, Xuebing Zhang, Edward Gagnon, Michael Timmons