Patents by Inventor Michael David McGehee
Michael David McGehee 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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Patent number: 11586089Abstract: The present disclosure is directed toward an electrodeposition-based dynamic glass element comprising an electrolyte that includes an aqueous solvent and an additive, wherein the electrolyte is stable over a temperature range that is greater than the stable temperature range of the aqueous solvent alone. In some embodiments, the freezing point of the electrolyte is lowered by its inclusion of the additive. Additives suitable for use in accordance with the present disclosure include alcohols, metal salts, sugars, cryoprotectants, and the like. In some cases, the freezing point of the aqueous-solvent-based electrolyte is lowered from 0° C. to ?40° C. by virtue of the inclusion of the additive. In some cases, the maximum stable temperature of the electrolyte is increased from 100° C. to 110° C. by virtue of the inclusion of the additive.Type: GrantFiled: November 16, 2018Date of Patent: February 21, 2023Assignees: The Board of Trustees of the Leland Stanford Junior University, Board of Regents of the Nevada System of Higher Education, on behalf of the University of Nevada, RenoInventors: Christopher J. Barile, Michael David McGehee, Daniel J. Slotcavage
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Patent number: 11292029Abstract: The present disclosure enables high contrast, fast, uniform, and color-neutral dynamic-glass elements based on uniform and reversible electrodeposition of metals a surface of the element. Elements in accordance with the present disclosure include a surface-modified transparent-conductor-based window electrode, wherein the surface modification of the window electrode includes a nucleation layer that is anchored to the transparent conductor via a non-metallic adhesion layer. In some embodiments, a plurality of traces is disposed on and electrically connected to the window electrode to reduce the voltage drop across the total area of the element, where the traces have a core made of a low-resistivity material.Type: GrantFiled: July 19, 2018Date of Patent: April 5, 2022Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Christopher J. Barile, Daniel J. Slotcavage, Michael David McGehee, Tyler S. Hernandez, Michael T. Strand
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Patent number: 11296244Abstract: A perovskite-based solar cell comprising a transparent electrode disposed on a buffer layer that protects the perovskite from damage during the deposition of the electrode is disclosed. The buffer material is deposited using either low-temperature atomic-layer deposition, chemical-vapor deposition, or pulsed chemical-vapor deposition. In some embodiments, the perovskite material is operative as an absorption layer in a multi-cell solar-cell structure. In some embodiments, the perovskite material is operative as an absorption layer in a single junction solar cell structure.Type: GrantFiled: September 15, 2017Date of Patent: April 5, 2022Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Kevin Alexander Bush, Axel F Palmstrom, Michael David McGehee, Stacey F Bent
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Patent number: 11158828Abstract: A buffer layer for protecting an organic layer during high-energy deposition of an electrically conductive layer is disclosed. Buffer layers in accordance with the present invention are particularly well suited for use in perovskite-based single-junction solar cells and double-junction solar cell structures that include at least one perovskite-based absorbing layer. In some embodiments, the buffer layer comprises a layer of oxide-based nanoparticles that is formed using solution-state processing, in which a solution comprising the nanoparticles and a volatile solvent is spin coated onto a structure that includes the organic layer. The solvent is subsequently removed in a low-temperature process that does not degrade the organic layer.Type: GrantFiled: December 12, 2019Date of Patent: October 26, 2021Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Kevin Alexander Bush, Colin David Bailie, Michael David McGehee, Tomas Leijtens
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Publication number: 20200363690Abstract: The present disclosure is directed toward an electrodeposition-based dynamic glass element comprising an electrolyte that includes an aqueous solvent and an additive, wherein the electrolyte is stable over a temperature range that is greater than the stable temperature range of the aqueous solvent alone. In some embodiments, the freezing point of the electrolyte is lowered by its inclusion of the additive. Additives suitable for use in accordance with the present disclosure include alcohols, metal salts, sugars, cryoprotectants, and the like. In some cases, the freezing point of the aqueous-solvent-based electrolyte is lowered from 0° C. to ?40° C. by virtue of the inclusion of the additive. In some cases, the maximum stable temperature of the electrolyte is increased from 100° C. to 110° C. by virtue of the inclusion of the additive.Type: ApplicationFiled: November 16, 2018Publication date: November 19, 2020Inventors: Christopher J. BARILE, Michael David MCGEHEE, Daniel J. SLOTCAVAGE
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Publication number: 20200142273Abstract: The present disclosure enables high contrast, fast, uniform, and color-neutral dynamic-glass elements based on uniform and reversible electrodeposition of metals a surface of the element. Elements in accordance with the present disclosure include a surface-modified transparent-conductor-based window electrode, wherein the surface modification of the window electrode includes a nucleation layer that is anchored to the transparent conductor via a non-metallic adhesion layer. In some embodiments, a plurality of traces is disposed on and electrically connected to the window electrode to reduce the voltage drop across the total area of the element, where the traces have a core made of a low-resistivity material.Type: ApplicationFiled: July 19, 2018Publication date: May 7, 2020Inventors: Christopher J. BARILE, Daniel J. SLOTCAVAGE, Michael David MCGEHEE, Tyler S. HERNANDEZ, Michael T. STRAND
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Publication number: 20200136072Abstract: A buffer layer for protecting an organic layer during high-energy deposition of an electrically conductive layer is disclosed. Buffer layers in accordance with the present invention are particularly well suited for use in perovskite-based single-junction solar cells and double-junction solar cell structures that include at least one perovskite-based absorbing layer. In some embodiments, the buffer layer comprises a layer of oxide-based nanoparticles that is formed using solution-state processing, in which a solution comprising the nanoparticles and a volatile solvent is spin coated onto a structure that includes the organic layer. The solvent is subsequently removed in a low-temperature process that does not degrade the organic layer.Type: ApplicationFiled: December 12, 2019Publication date: April 30, 2020Inventors: Kevin Alexander BUSH, Colin David BAILIE, Michael David MCGEHEE, Tomas LEIJTENS
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Patent number: 10535791Abstract: A 2-terminal multi-junction solar cell having a thin film of metal halide semiconductor as the top solar-cell material and crystalline silicon as the bottom solar-cell material. In the illustrative embodiment, the top solar-cell material is a perovskite of the form AM(IxH1-x)3, where A is a cation, preferably methylammonium (CH3NH3), formamidinium ([R2N—CH?NR2]+), or cesium; M is metal, preferably Pb, Sn, Ge; H is a halide, preferably Br or Cl; and x=iodine fraction, in the range of 0 to 1, inclusive. The integration of the two solar-cell materials is enabled by the use of a tunnel junction composed of indirect band-gap material.Type: GrantFiled: December 3, 2015Date of Patent: January 14, 2020Assignees: The Board of Trustees of the Leland Stanford Junior University, Massachusetts Institute of TechnologyInventors: Jonathan P. Mailoa, Colin David Bailie, Eric Carl Johlin, Michael David McGehee, Tonio Buonassisi
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Patent number: 10522774Abstract: A buffer layer for protecting an organic layer during high-energy deposition of an electrically conductive layer is disclosed. Buffer layers in accordance with the present invention are particularly well suited for use in perovskite-based single-junction solar cells and double-junction solar cell structures that include at least one perovskite-based absorbing layer. In some embodiments, the buffer layer comprises a layer of oxide-based nanoparticles that is formed using solution-state processing, in which a solution comprising the nanoparticles and a volatile solvent is spin coated onto a structure that includes the organic layer. The solvent is subsequently removed in a low-temperature process that does not degrade the organic layer.Type: GrantFiled: October 21, 2016Date of Patent: December 31, 2019Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Kevin Alexander Bush, Colin David Bailie, Michael David McGehee, Tomas Leijtens
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Publication number: 20180309077Abstract: A buffer layer for protecting an organic layer during high-energy deposition of an electrically conductive layer is disclosed. Buffer layers in accordance with the present invention are particularly well suited for use in perovskite-based single-junction solar cells and double-junction solar cell structures that include at least one perovskite-based absorbing layer. In some embodiments, the buffer layer comprises a layer of oxide-based nanoparticles that is formed using solution-state processing, in which a solution comprising the nanoparticles and a volatile solvent is spin coated onto a structure that includes the organic layer. The solvent is subsequently removed in a low-temperature process that does not degrade the organic layer.Type: ApplicationFiled: October 21, 2016Publication date: October 25, 2018Inventors: Kevin Alexander BUSH, Colin David BAILIE, Michael David MCGEHEE, Tomas LEIJTENS
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Publication number: 20170040557Abstract: A solar-cell module comprising a tandem solar cell and a controller that substantially optimizes the power output the tandem solar cell is disclosed. The tandem solar cell includes a first solar cell having a first energy bandgap and a second solar cell having a second energy bandgap, where the first and second solar cells are arranged such that light not absorbed by the first solar cell passes through it to the second solar cell to be absorbed. The controller controls an electrical parameter, such as current or voltage, of at least one of the first and second solar cells such that the electrical parameter is equal in both cells, thereby substantially optimizing the output power of the tandem solar cell.Type: ApplicationFiled: August 5, 2016Publication date: February 9, 2017Inventors: Colin Bailie, Timothy Matthew Burke, Michael David McGehee
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Patent number: 9564593Abstract: A solar cell includes a light-absorbing layer comprising a 2d-perovskite.Type: GrantFiled: June 8, 2015Date of Patent: February 7, 2017Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Hemamala Indivari Karunadasa, Ian Smith, Michael David McGehee
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Publication number: 20160163904Abstract: A 2-terminal multi-junction solar cell having a thin film of metal halide semiconductor as the top solar-cell material and crystalline silicon as the bottom solar-cell material. In the illustrative embodiment, the top solar-cell material is a perovskite of the form AM(IxH1-x)3, where A is a cation, preferably methylammonium (CH3NH3), formamidinium ([R2N—CH?NR2]+), or cesium; M is metal, preferably Pb, Sn, Ge; H is a halide, preferably Br or Cl; and x=iodine fraction, in the range of 0 to 1, inclusive. The integration of the two solar-cell materials is enabled by the use of a tunnel junction composed of indirect band-gap material.Type: ApplicationFiled: December 3, 2015Publication date: June 9, 2016Inventors: Jonathan P. Mailoa, Colin David Bailie, Eric Carl Johlin, Michael David McGehee, Tonio Buonassisi
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Publication number: 20150357591Abstract: A solar cell includes a light-absorbing layer comprising a 2d-perovskite.Type: ApplicationFiled: June 8, 2015Publication date: December 10, 2015Inventors: Hemamala Indivari Karunadasa, Ian Smith, Michael David McGehee
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Patent number: 8895844Abstract: A method for forming a solar cell having a plasmonic back reflector is disclosed. The method includes the formation of a nanoimprinted surface on which a metal electrode is conformally disposed. The surface structure of the nanoimprinted surface gives rise to a two-dimensional pattern of nanometer-scale features in the metal electrode enabling these features to collectively form the plasmonic back reflector.Type: GrantFiled: November 29, 2011Date of Patent: November 25, 2014Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: I-Kang Ding, Jia Zhu, Yi Cui, Michael David McGehee
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Publication number: 20120125430Abstract: A method for forming a solar cell having a plasmonic back reflector is disclosed. The method includes the formation of a nanoimprinted surface on which a metal electrode is conformally disposed. The surface structure of the nanoimprinted surface gives rise to a two-dimensional pattern of nanometer-scale features in the metal electrode enabling these features to collectively form the plasmonic back reflector.Type: ApplicationFiled: November 29, 2011Publication date: May 24, 2012Applicant: The Board of Trustees of the Leland Stanford Junior UniversityInventors: I-Kang Ding, Jia Zhu, Yi Cui, Michael David McGehee