Patents by Inventor William A Crossland

William A Crossland 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: 20200365748
    Abstract: The invention provides an optoelectronic device comprising a photoactive region, which photoactive region comprises: an n-type region comprising at least one n-type layer; a p-type region comprising at least one p-type layer; and, disposed between the n-type region and the p-type region: a layer of a perovskite semiconductor without open porosity. The perovskite semiconductor is generally light-absorbing. In some embodiments, disposed between the n-type region and the p-type region is: (i) a first layer which comprises a scaffold material, which is typically porous, and a perovskite semiconductor, which is typically disposed in pores of the scaffold material; and (ii) a capping layer disposed on said first layer, which capping layer is said layer of a perovskite semiconductor without open porosity, wherein the perovskite semiconductor in the capping layer is in contact with the perovskite semiconductor in the first layer.
    Type: Application
    Filed: June 24, 2020
    Publication date: November 19, 2020
    Inventors: HENRY JAMES SNAITH, EDWARD JAMES WILLIAM CROSSLAND, ANDREW HEY, JAMES BALL, MICHAEL LEE, PABLO DOCAMPO
  • Patent number: 10777364
    Abstract: A formulation for use in the preferential formation of thin films of a perovskite material AMX3 with a certain required crystalline structure, wherein said formulation comprises two or more compounds which between them comprise one or more first organic cations A; one or more metal cations M; one or more second cations A?; one or more first anions X and one or more second anions X?.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: September 15, 2020
    Assignee: OXFORD PHOTOVOLTAICS LIMITED
    Inventors: Nicola Beaumont, Brett Akira Kamino, Benjamin Langley, Edward James William Crossland
  • Patent number: 10593487
    Abstract: A formulation for use in the preferential formation of thin films of a perovskite material AMX 3 with a certain required crystalline structure, wherein said formulation comprises two or more compounds which between them comprise one or more first organic cations A; one or more metalcations M; one or more second cations A?; one or more first anions X and one or more second anions X?.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: March 17, 2020
    Assignee: OXFORD PHOTOVOLTAICS LIMITED
    Inventors: Nicola Beaumont, Brett Akira Kamino, Benjamin Langley, Edward James William Crossland
  • Publication number: 20200051752
    Abstract: A formulation for use in the preferential formation of thin films of a perovskite material AMX3 with a certain required crystalline structure, wherein said formulation comprises two or more compounds which between them comprise one or more first organic cations A; one or more metal cations M; one or more second cations A?; one or more first anions X and one or more second anions X?.
    Type: Application
    Filed: October 16, 2019
    Publication date: February 13, 2020
    Inventors: Nicola BEAUMONT, Brett Akira KAMINO, Benjamin LANGLEY, Edward James William CROSSLAND
  • Patent number: 10310261
    Abstract: An imaging device includes a projection optic arranged to form a virtual image of an object. The imaging device further includes a first diffuser positioned a first distance from the virtual projection optic and a second diffuser positioned a second distance from the virtual projection optic. The controller is arranged to control the first and second diffuser to make the real image visible on one of the diffusers.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: June 4, 2019
    Assignee: TWO TREES PHOTONICS LIMITED
    Inventors: Jamieson Christmas, Dackson Masiyano, William Crossland
  • Publication number: 20180315870
    Abstract: The invention provides an optoelectronic device comprising a photoactive region, which photoactive region comprises: an n-type region comprising at least one n-type layer; a p-type region comprising at least one p-type layer; and, disposed between the n-type region and the p-type region: a layer of a perovskite semiconductor without open porosity. The perovskite semiconductor is generally light-absorbing. In some embodiments, disposed between the n-type region and the p-type region is: (i) a first layer which comprises a scaffold material, which is typically porous, and a perovskite semiconductor, which is typically disposed in pores of the scaffold material; and (ii) a capping layer disposed on said first layer, which capping layer is said layer of a perovskite semiconductor without open porosity, wherein the perovskite semiconductor in the capping layer is in contact with the perovskite semiconductor in the first layer.
    Type: Application
    Filed: June 20, 2018
    Publication date: November 1, 2018
    Inventors: HENRY JAMES SNAITH, EDWARD JAMES WILLIAM CROSSLAND, ANDREW HEY, JAMES BALL, MICHAEL LEE, PABLO DOCAMPO
  • Patent number: 10069025
    Abstract: The invention provides an optoelectronic device comprising a photoactive region, which photoactive region comprises: an n-type region comprising at least one n-type layer; a p-type region comprising at least one p-type layer; and, disposed between the n-type region and the p-type region: a layer of a perovskite semiconductor without open porosity. The perovskite semiconductor is generally light-absorbing. In some embodiments, disposed between the n-type region and the p-type region is: (i) a first layer which comprises a scaffold material, which is typically porous, and a perovskite semiconductor, which is typically disposed in pores of the scaffold material; and (ii) a capping layer disposed on said first layer, which capping layer is said layer of a perovskite semiconductor without open porosity, wherein the perovskite semiconductor in the capping layer is in contact with the perovskite semiconductor in the first layer.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: September 4, 2018
    Assignee: OXFORD UNIVERSITY INNOVATION LIMITED
    Inventors: Henry James Snaith, Edward James William Crossland, Andrew Hey, James Ball, Michael Lee, Pablo Docampo
  • Patent number: 10067471
    Abstract: A LCOS routing device, comprising: an optical input and plurality of optical outputs; a spatial light modulator (SLM) between said input and output, for displaying a kinoform; a data processor, configured to provide kinoform data for displaying said kinoform on said SLM. Said data processor inputs routing and calculates said kinoform data. Said data processor calculates kinoform data by: determining an initial phase pattern for said kinoform; calculating a replay field of said phase pattern; modifying an amplitude component of said replay field, retaining a phase component of said replay field to provide an updated replay field; performing a space-frequency transform on said updated replay field to determine an updated phase pattern for said kinoform; and repeating said calculating and updating of said replay field and said performing of said space-frequency transform until said kinoform for display is determined; and outputting said kinoform data for display on said LCOS SLM.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: September 4, 2018
    Assignee: CAMBRIDGE ENTERPRISE LIMITED
    Inventors: Neil Collings, Andreas Georgiou, Maura Michelle Redmond, Brian Robertson, Jinsong Liu, William Crossland, John Richard Moore, Daping Chu
  • Patent number: 9930431
    Abstract: This invention relates to methods and apparatus for routing light beams in telecommunications devices using holographic techniques, in particular by displaying kinoforms on Liquid Crystal on Silicon devices. At least one optical input to receives an input beam. A plurality of optical outputs and a spatial light modulator (SLM) on an optical path between said optical input and said optical outputs are provided, and a driver for said SLM to display a kinoform on said SLM diffracts said input beam into an output beam comprising a plurality of diffraction orders, wherein a routed one of said diffraction orders is directed to at least one selected said optical output; said apparatus is configured to modify a wavefront of said output beam to reduce a coupling of said output beam into said selected optical output; and said kinoform is adapted to compensate for said wavefront modification to compensate for said reduced coupling.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: March 27, 2018
    Assignee: Cambridge Enterprise Limited
    Inventors: Daping Chu, Neil Collings, William Crossland, Maura Michelle Redmond, Brian Robertson
  • Publication number: 20170358398
    Abstract: There is provided a photovoltaic device that comprises a front electrode, a back electrode, and disposed between the front electrode and the back electrode, an electron transporter region comprising an electron transporter layer; a hole transporter region comprising a hole transporter layer, and a layer of perovskite semiconductor disposed between and in contact with the electron transporter layer and the hole transporter layer. The electron transporter region is nearest to the front electrode and the hole transporter region is nearest to the back electrode, and the electron transporter layer comprises any of a chalcogenide material and an organic material and has a thickness of at least 2 nm.
    Type: Application
    Filed: November 11, 2015
    Publication date: December 14, 2017
    Applicant: Oxford Photovoltaics Limited
    Inventors: Nicola BEAUMONT, Brett Akira KAMINO, Benjamin LANGLEY, Edward James William CROSSLAND, Henry James SNAITH
  • Publication number: 20170315507
    Abstract: A LCOS routing device, comprising: an optical input and plurality of optical outputs; a spatial light modulator (SLM) between said input and output, for displaying a kinoform; a data processor, configured to provide kinoform data for displaying said kinoform on said SLM. Said data processor inputs routing and calculates said kinoform data. Said data processor calculates kinoform data by: determining an initial phase pattern for said kinoform; calculating a replay field of said phase pattern; modifying an amplitude component of said replay field, retaining a phase component of said replay field to provide an updated replay field; performing a space-frequency transform on said updated replay field to determine an updated phase pattern for said kinoform; and repeating said calculating and updating of said replay field and said performing of said space-frequency transform until said kinoform for display is determined; and outputting said kinoform data for display on said LCOS SLM.
    Type: Application
    Filed: December 19, 2016
    Publication date: November 2, 2017
    Inventors: Neil Collings, Andreas Georgiou, Maura Michelle Redmond, Brian Robertson, Jinsong Liu, William Crossland, John Richard Moore, Daping Chu
  • Publication number: 20170243699
    Abstract: A formulation for use in the preferential formation of thin films of a perovskite material AMX 3 with a certain required crystalline structure, wherein said formulation comprises two or more compounds which between them comprise one or more first organic cations A; one or more metalcations M; one or more second cations A?; one or more first anions X and one or more second anions X?.
    Type: Application
    Filed: September 2, 2015
    Publication date: August 24, 2017
    Inventors: Nicola BEAUMONT, Brett Akira KAMINO, Benjamin LANGLEY, Edward James William CROSSLAND
  • Publication number: 20170082855
    Abstract: There is provided an imaging device. The imaging device comprises a projection optic arranged to form a virtual image of an object. The imaging device further comprises a first diffuser positioned a first distance from the virtual projection optic and a second diffuser positioned a second distance from the virtual projection optic. The controller is arranged to control the first and second diffuser to make the real image visible on one of the diffusers.
    Type: Application
    Filed: May 13, 2015
    Publication date: March 23, 2017
    Inventors: Jamieson Christmas, Dackson Masiyano, William Crossland
  • Patent number: 9547276
    Abstract: We describe a LCOS (liquid crystal on silicon) telecommunications light beam routing device, the device comprising: an optical input; a plurality of optical outputs; a LCOS spatial light modulator (SLM) in an optical path between said input and said output, for displaying a kinoform; a data processor, coupled to said SLM, configured to provide kinoform data for displaying said kinoform on said SLM; wherein said kinoform data defines a kinoform which routes a beam from said optical input to a selected said optical output; wherein said data processor is configured to input routing data defining said selected optical output and to calculate said kinoform data for routing said beam responsive to said routing data; and wherein said data processor is configured to calculate said kinoform data by: determining an initial phase pattern for said kinoform; calculating a replay field of said phase pattern; modifying an amplitude component of said replay field to represent a target replay field for said beam routing, reta
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: January 17, 2017
    Assignee: Cambridge Enterprise Limited
    Inventors: Neil Collings, Andreas Georgiou, Marua Michelle Redmond, Brian Robertson, Jinsong Liu, William Crossland, John Richard Moore, Daping Chu
  • Publication number: 20160301994
    Abstract: This invention relates to methods and apparatus for routing light beams in telecommunications devices using holographic techniques, in particular by displaying kinoforms on Liquid Crystal on Silicon devices. At least one optical input to receives an input beam. A plurality of optical outputs and a spatial light modulator (SLM) on an optical path between said optical input and said optical outputs are provided, and a driver for said SLM to display a kinoform on said SLM diffracts said input beam into an output beam comprising a plurality of diffraction orders, wherein a routed one of said diffraction orders is directed to at least one selected said optical output; said apparatus is configured to modify a wavefront of said output beam to reduce a coupling of said output beam into said selected optical output; and said kinoform is adapted to compensate for said wavefront modification to compensate for said reduced coupling.
    Type: Application
    Filed: June 6, 2016
    Publication date: October 13, 2016
    Applicant: Cambridge Enterprise Limited
    Inventors: Daping Chu, Neil Collings, William Crossland, Maura Michelle Redmond, Brian Robertson
  • Patent number: 9363582
    Abstract: This invention relates to methods and apparatus for routing light beams in telecommunications devices using holographic techniques, in particular by displaying kinoforms on LCOS (Liquid Crystal on Silicon) devices.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: June 7, 2016
    Assignee: Cambridge Enterprise Limited
    Inventors: Daping Chu, Neil Collings, William Crossland, Maura Michelle Redmond, Brian Robertson
  • Patent number: 9274400
    Abstract: The invention relates to optical beam steering. There is described an optical beam steering apparatus, comprising: a splitter arranged to split an optical beam into at least a first part having a first polarization and a second part having a second polarization, said first and second polarizations being substantially mutually orthogonal; a first liquid crystal device region arranged to receive said first part and to have director orientation substantially aligned to said first polarization; and a second liquid crystal device region arranged to receive said second part and to have director orientation substantially aligned to said second polarization.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: March 1, 2016
    Assignee: Cambridge Enterprise Limited, University of Cambridge
    Inventors: Neil Collings, William Crossland, Maura Michelle Redmond, John Richard Moore, David Nugent, Brian Robertson
  • Publication number: 20160013434
    Abstract: The invention provides a process for producing a layer of a semiconductor material, wherein the process comprises: a) disposing on a substrate: i) a plurality of particles of a semiconductor material, ii) a binder, wherein the binder is a molecular compound comprising at least one metal atom or metalloid atom, and iii) a solvent; and b) removing the solvent. The invention also provides a layer of semiconductor material obtainable by this process. In a preferred embodiment, the particles of a semiconductor material comprise mesoporous particles of the semiconductor material or mesoporous single crystals of the semiconductor material.
    Type: Application
    Filed: February 28, 2014
    Publication date: January 14, 2016
    Inventors: Henry James SNAITH, Edward James Williams CROSSLAND, Nakita NOEL, Varun SIVARAM, Tomas LEIJTENS
  • Publication number: 20150286187
    Abstract: We describe a LCOS (liquid crystal on silicon) telecommunications light beam routing device, the device comprising: an optical input; a plurality of optical outputs; a LCOS spatial light modulator (SLM) in an optical path between said input and said output, for displaying a kinoform; a data processor, coupled to said SLM, configured to provide kinoform data for displaying said kinoform on said SLM; wherein said kinoform data defines a kinoform which routes a beam from said optical input to a selected said optical output; wherein said data processor is configured to input routing data defining said selected optical output and to calculate said kinoform data for routing said beam responsive to said routing data; and wherein said data processor is configured to calculate said kinoform data by: determining an initial phase pattern for said kinoform; calculating a replay field of said phase pattern; modifying an amplitude component of said replay field to represent a target replay field for said beam routing, reta
    Type: Application
    Filed: February 15, 2012
    Publication date: October 8, 2015
    Applicant: CAMBRIDGE ENTERPRISE LIMITED
    Inventors: Neil Collings, Andreas Georgiou, Marua Michelle Redmond, Brian Robertson, Jinsong Liu, William Crossland, John Richard Moore, Daping Chu
  • Publication number: 20150249170
    Abstract: The invention provides an optoelectronic device comprising a photoactive region, which photoactive region comprises: an n-type region comprising at least one n-type layer; a p-type region comprising at least one p-type layer; and, disposed between the n-type region and the p-type region: a layer of a perovskite semiconductor without open porosity. The perovskite semiconductor is generally light-absorbing. In some embodiments, disposed between the n-type region and the p-type region is: (i) a first layer which comprises a scaffold material, which is typically porous, and a perovskite semiconductor, which is typically disposed in pores of the scaffold material; and (ii) a capping layer disposed on said first layer, which capping layer is said layer of a perovskite semiconductor without open porosity, wherein the perovskite semiconductor in the capping layer is in contact with the perovskite semiconductor in the first layer.
    Type: Application
    Filed: September 17, 2013
    Publication date: September 3, 2015
    Applicant: ISIS INNOVATION LIMITED
    Inventors: Henry James Snaith, Edward James William Crossland, Andrew Hey, James Ball, Michael Lee, Pablo Docampo