Patents by Inventor Marc A. Baldo

Marc A. Baldo 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).

  • Patent number: 10794771
    Abstract: The present invention generally relates to composition and methods for downconverting light. In some embodiments, the composition and methods comprise an organic material, a nanocrystal, and a ligand capable of facilitating energy transfer between the organic material and the nanocrystal. In certain embodiments, the nanocrystal has a first excited energy state with an energy less than a triplet energy state of the organic material. The organic material, in some embodiments, may be aromatic and/or include one or more pi-conjugated carbon-carbon double bonds. In some cases, incident light may be absorbed by the organic material to produce two triplet excitons. The triplet excitons may then transfer to the nanocrystal via the ligand, where they can undergo recombination, resulting in the formation low energy photons.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: October 6, 2020
    Assignee: Massachusetts Institute of Technology
    Inventors: Daniel N. Congreve, Nicholas John Thompson, Mark W. B. Wilson, Mengfei Wu, Marc A. Baldo, Moungi G. Bawendi, Vladimir Bulovic
  • Patent number: 10629827
    Abstract: Organic light emitting devices are described wherein the emissive layer comprises a host material containing an emissive molecule, which molecule is adapted to luminesce when a voltage is applied across the heterostructure, and the emissive molecule is selected from the group of phosphorescent organometallic complexes, including cyclometallated platinum, iridium and osmium complexes. The organic light emitting devices optionally contain an exciton blocking layer. Furthermore, improved electroluminescent efficiency in organic light emitting devices is obtained with an emitter layer comprising organometallic complexes of transition metals of formula L2MX, wherein L and X are distinct bidentate ligands. Compounds of this formula can be synthesized more facilely than in previous approaches and synthetic options allow insertion of fluorescent molecules into a phosphorescent complex, ligands to fine tune the color of emission, and ligands to trap carriers.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: April 21, 2020
    Assignees: The Trustees of Princeton University, The University of Southern California
    Inventors: Mark E. Thompson, Peter Djurovich, Sergey Lamansky, Drew Murphy, Raymond Kwong, Feras Abdel-Razzaq, Stephen R. Forrest, Marc A. Baldo, Paul A. Burrows
  • Publication number: 20190372038
    Abstract: Embodiments related to interlayers (e.g., interlayers comprising a transition metal oxide, a transition metal oxynitride, and/or a transition metal nitride) and associated systems, devices (e.g., photovoltaic devices), and methods are disclosed. In some embodiments, a system for exciton transfer includes a substrate including an inorganic semiconductor. An interlayer may be disposed on the substrate, and a layer including a material that undergoes singlet exciton fission when exposed to electromagnetic radiation may be disposed on the interlayer. The interlayer may be disposed between the substrate and the layer. In some embodiments, a method for manufacturing a system for exciton transfer involves depositing an interlayer onto a substrate that includes an inorganic semiconductor. The method may also include depositing a layer including a material that undergoes singlet exciton fission when exposed to electromagnetic radiation onto the interlayer.
    Type: Application
    Filed: May 30, 2019
    Publication date: December 5, 2019
    Applicant: Massachusetts Institute of Technology
    Inventors: Marc A. Baldo, Tony Wu, Markus Einzinger
  • Publication number: 20190348636
    Abstract: An OLED is disclosed that includes an enhancement layer having optically active metamaterials, or hyperbolic metamaterials, which transfer radiative energy from the organic emissive material to a non-radiative mode, wherein the enhancement layer is disposed over the organic emissive layer opposite from the first electrode, and is positioned no more than a threshold distance away from the organic emissive layer, wherein the organic emissive material has a total non-radiative decay rate constant and a total radiative decay rate constant due to the presence of the enhancement layer, and the threshold distance is where the total non-radiative decay rate constant is equal to the total radiative decay rate constant; and an outcoupling layer disposed over the enhancement layer, wherein the outcoupling layer scatters radiative energy from the enhancement layer to free space.
    Type: Application
    Filed: July 26, 2019
    Publication date: November 14, 2019
    Applicant: Universal Display Corporation
    Inventors: Nicholas J. THOMPSON, Marc A. BALDO, Michael S. WEAVER, Vinod M. MENON
  • Publication number: 20190330735
    Abstract: A two-dimensional transition-metal dichalcogenide layer is grown by reacting a non- or low-volatile source material with a volatilized halogen or halide compound to produce a volatilized composition comprising at least one reaction product. The volatilized composition is flowed through an open chamber of a tube furnace with a temperature gradient, wherein the temperature changes along a path through which the volatilized composition flows through the open chamber of the tube furnace. Where the temperature along the path in the open chamber is in a reaction-temperature range, the volatilized composition is deposited as a two-dimensional crystalline transition-metal dichalcogenide layer.
    Type: Application
    Filed: April 17, 2018
    Publication date: October 31, 2019
    Applicant: Massachusetts Institute of Technology
    Inventors: Brian J. Modtland, Jing Kong, Marc A. Baldo, Efren Navarro-Moratalla, Xiang Ji
  • Patent number: 10403854
    Abstract: An OLED is disclosed that includes an enhancement layer having optically active metamaterials, or hyperbolic metamaterials, which transfer radiative energy from the organic emissive material to a non-radiative mode, wherein the enhancement layer is disposed over the organic emissive layer opposite from the first electrode, and is positioned no more than a threshold distance away from the organic emissive layer, wherein the organic emissive material has a total non-radiative decay rate constant and a total radiative decay rate constant due to the presence of the enhancement layer, and the threshold distance is where the total non-radiative decay rate constant is equal to the total radiative decay rate constant; and an outcoupling layer disposed over the enhancement layer, wherein the outcoupling layer scatters radiative energy from the enhancement layer to free space.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: September 3, 2019
    Assignee: UNIVERSAL DISPLAY CORPORATION
    Inventors: Nicholas J. Thompson, Marc A. Baldo, Michael S. Weaver, Vinod M. Menon
  • Patent number: 10236450
    Abstract: Embodiments described herein relate to compositions including bridged bicyclic compounds such as iptycene-based structures and extended iptycene structures. In some embodiments, the compositions may be useful in organic light-emitting diodes (OLEDs), organic photovoltaics, and other devices.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: March 19, 2019
    Assignee: Massachusetts Institute of Technology
    Inventors: Timothy M. Swager, Troy Andrew Van Voorhis, Marc A. Baldo, Tony Wu, Katsuaki Kawasumi, Tianyu Zhu
  • Publication number: 20180219182
    Abstract: An OLED is disclosed that includes an enhancement layer having optically active metamaterials, or hyperbolic metamaterials, which transfer radiative energy from the organic emissive material to a non-radiative mode, wherein the enhancement layer is disposed over the organic emissive layer opposite from the first electrode, and is positioned no more than a threshold distance away from the organic emissive layer, wherein the organic emissive material has a total non-radiative decay rate constant and a total radiative decay rate constant due to the presence of the enhancement layer, and the threshold distance is where the total non-radiative decay rate constant is equal to the total radiative decay rate constant; and an outcoupling layer disposed over the enhancement layer, wherein the outcoupling layer scatters radiative energy from the enhancement layer to free space.
    Type: Application
    Filed: March 26, 2018
    Publication date: August 2, 2018
    Applicant: Universal Display Corporation
    Inventors: Nicholas J. THOMPSON, Marc A. BALDO, Michael S. WEAVER, Vinod M. MENON
  • Publication number: 20180205020
    Abstract: In one aspect, compositions comprising emissive compounds including polycyclic aromatic groups are provided. In some embodiments, the emissive compounds may include various moieties having desirable physical and electronic properties. In some embodiments, the compositions may be useful for use in, for example, organic light-emitting diodes (OLEDs), chemical sensors, organic photovoltaics, and other devices. An advantageous feature of some embodiments described herein is the ability to tune the electronic properties of the compositions in order to suit a particular application. For example, compositions comprising emissive compounds described herein may exhibit thermally activated delayed fluorescence (TADF) and may be useful as emissive chromophores in e.g., OLED devices. In other cases, the compositions may exhibit high-lying triplet states and may be able to trap various triplet emitters, for use as e.g., host materials for OLED devices.
    Type: Application
    Filed: January 10, 2018
    Publication date: July 19, 2018
    Applicant: Massachusetts Institute of Technology
    Inventors: Timothy M. Swager, Hiroyuki Tsujimoto, Georgios Markopoulos, Dong-Gwang Ha, Marc A. Baldo
  • Patent number: 9972795
    Abstract: Described herein are molecules for use in organic light emitting diodes. Example molecules comprise at least one moiety A and at least one moiety D. Values and preferred values of the moieties A and D are described herein. The molecules comprise at least one atom selected from Si, Se, Ge, Sn, P, or As.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: May 15, 2018
    Assignees: Presidents and Fellows of Harvard College, Massachusetts Institute of Technology
    Inventors: Alan Aspuru-Guzik, Rafael Gomez-Bombarelli, Jorge Aguilera-Iparraguirre, Marc Baldo, Troy Van Voorhis, Timothy D. Hirzel, Matthias Bahlke, David McMahon, Tony Chang-Chi Wu
  • Patent number: 9960386
    Abstract: A method for improving the operation of an OLED includes maximizing on-radiative transfer of excited state energy from the OLED's organic emissive material to surface plasmon polaritons in an enhancement layer by providing the enhancement layer no more than a threshold distance away from the organic emissive layer; and emitting light into free space from the enhancement layer by scattering the energy from the surface plasmon polaritons through an outcoupling layer that is provided proximate to the enhancement layer but opposite from the organic emissive layer.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: May 1, 2018
    Assignee: Universal Display Corporation
    Inventors: Nicholas J. Thompson, Marc A. Baldo, Michael S. Weaver, Vinod M. Menon
  • Patent number: 9944847
    Abstract: The present invention generally relates to composition and methods for upconverting light. In some embodiments, the composition and methods comprise an organic material, a nanocrystal, and a ligand capable of facilitating energy transfer between the nanocrystal and the organic material. In certain embodiments, the nanocrystal has a first excited energy state with an energy greater than a triplet state of the organic material. The organic material, in some embodiments, may be aromatic and/or include one or more pi-conjugated carbon-carbon double bonds. In some cases, incident light may be absorbed by the nanocrystal to produce triplet excitons. The triplet excitons may then transfer from the nanocrystal to the organic material and undergo triplet-triplet annihilation, creating a singlet state of approximately twice the energy of the triplet exciton. In certain embodiments, the singlet state fluoresces, resulting in the formation of a high energy photon.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: April 17, 2018
    Assignee: Massachusetts Institute of Technology
    Inventors: Marc A. Baldo, Daniel N. Congreve, Nicholas John Thompson, Mark W. B. Wilson, Mengfei Wu, Moungi G. Bawendi, Vladimir Bulovic
  • Publication number: 20170301869
    Abstract: Organic light emitting devices are described wherein the emissive layer comprises a host material containing an emissive molecule, which molecule is adapted to luminesce when a voltage is applied across the heterostructure, and the emissive molecule is selected from the group of phosphorescent organometallic complexes, including cyclometallated platinum, iridium and osmium complexes. The organic light emitting devices optionally contain an exciton blocking layer. Furthermore, improved electroluminescent efficiency in organic light emitting devices is obtained with an emitter layer comprising organometallic complexes of transition metals of formula L2MX, wherein L and X are distinct bidentate ligands. Compounds of this formula can be synthesized more facilely than in previous approaches and synthetic options allow insertion of fluorescent molecules into a phosphorescent complex, ligands to fine tune the color of emission, and ligands to trap carriers.
    Type: Application
    Filed: August 29, 2013
    Publication date: October 19, 2017
    Applicants: The University of Southern California, The Trustees of Princeton University
    Inventors: Mark E. Thompson, Peter Djurovich, Sergey Lamansky, Drew Murphy, Raymond Kwong, Feras Abdel-Razzaq, Stephen R. Forrest, Marc A. Baldo, Paul A. Burrows
  • Publication number: 20170271601
    Abstract: Described herein are molecules for use in organic light emitting diodes. Example molecules comprise at least one moiety A and at least one moiety D. Values and preferred values of the moieties A and D are described herein. The molecules comprise at least one atom selected from Si, Se, Ge, Sn, P, or As.
    Type: Application
    Filed: May 13, 2015
    Publication date: September 21, 2017
    Inventors: Alan Aspuru-Guzik, Rafael Gomez-Bombarelli, Jorge Aguilera-Iparraguirre, Marc Baldo, Troy Van Voorhi, Timothy D. Hirzel, Matthias Bahlke, David McMahon, Tony Chang-Chi Wu
  • Publication number: 20170133631
    Abstract: A method for improving the operation of an OLED includes maximizing on-radiative transfer of excited state energy from the OLED's organic emissive material to surface plasmon polaritons in an enhancement layer by providing the enhancement layer no more than a threshold distance away from the organic emissive layer; and emitting light into free space from the enhancement layer by scattering the energy from the surface plasmon polaritons through an outcoupling layer that is provided proximate to the enhancement layer but opposite from the organic emissive layer.
    Type: Application
    Filed: July 24, 2015
    Publication date: May 11, 2017
    Applicant: Universal Display Corporation
    Inventors: Nicholas J. THOMPSON, Marc A. BALDO, Michael S. WEAVER, Vinod M. MENON
  • Publication number: 20160285007
    Abstract: Embodiments described herein relate to compositions including bridged bicyclic compounds such as iptycene-based structures and extended iptycene structures. In some embodiments, the compositions may be useful in organic light-emitting diodes (OLEDs), organic photovoltaics, and other devices.
    Type: Application
    Filed: March 23, 2016
    Publication date: September 29, 2016
    Applicant: Massachusetts Institute of Technology
    Inventors: Timothy M. Swager, Troy Andrew Van Voorhis, Marc A. Baldo, Tony Wu, Katsuaki Kawasumi, Tianyu Zhu
  • Publication number: 20160237343
    Abstract: The present invention generally relates to composition and methods for upconverting light. In some embodiments, the composition and methods comprise an organic material, a nanocrystal, and a ligand capable of facilitating energy transfer between the nanocrystal and the organic material. In certain embodiments, the nanocrystal has a first excited energy state with an energy greater than a triplet state of the organic material. The organic material, in some embodiments, may be aromatic and/or include one or more pi-conjugated carbon-carbon double bonds. In some cases, incident light may be absorbed by the nanocrystal to produce triplet excitons. The triplet excitons may then transfer from the nanocrystal to the organic material and undergo triplet-triplet annihilation, creating a singlet state of approximately twice the energy of the triplet exciton. In certain embodiments, the singlet state fluoresces, resulting in the formation of a high energy photon.
    Type: Application
    Filed: February 16, 2016
    Publication date: August 18, 2016
    Applicant: Massachusetts Institute of Technology
    Inventors: Marc A. Baldo, Daniel N. Congreve, Nicholas John Thompson, Mark W.B. Wilson, Mengfei Wu, Moungi G. Bawendi, Vladimir Bulovic
  • Publication number: 20160238455
    Abstract: The present invention generally relates to composition and methods for downconverting light. In some embodiments, the composition and methods comprise an organic material, a nanocrystal, and a ligand capable of facilitating energy transfer between the organic material and the nanocrystal. In certain embodiments, the nanocrystal has a first excited energy state with an energy less than a triplet energy state of the organic material. The organic material, in some embodiments, may be aromatic and/or include one or more pi-conjugated carbon-carbon double bonds. In some cases, incident light may be absorbed by the organic material to produce two triplet excitons. The triplet excitons may then transfer to the nanocrystal via the ligand, where they can undergo recombination, resulting in the formation low energy photons.
    Type: Application
    Filed: February 16, 2016
    Publication date: August 18, 2016
    Applicant: Massachusetts Institute of Technology
    Inventors: Daniel N. Congreve, Nicholas John Thompson, Mark W.B. Wilson, Mengfei Wu, Marc A. Baldo, Moungi G. Bawendi, Vladimir Bulovic
  • Patent number: 9385322
    Abstract: In one embodiment the disclosure relates to an apparatus for depositing an organic material on a substrate, including a source heater for heating organic particles to form suspended organic particles; a transport stream for delivering the suspended organic particles to a discharge nozzle, the discharge nozzle having a plurality of micro-pores, the micro-pores providing a conduit for passage of the suspended organic particles; and a nozzle heater for pulsatingly heating the micro-pores nozzle to discharge the suspended organic particles from the discharge nozzle.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: July 5, 2016
    Assignee: Massachusetts Institute of Technology
    Inventors: Vladimir Bulovic, Marc A. Baldo, Martin A. Schmidt, Valerie Gassend, Jianglong Chen
  • Patent number: 9208845
    Abstract: A logic gate device is disclosed. The logic gate device structure can include a magnetic tunnel junction on a soft ferromagnetic wire to provide a readout. One input contact can be at one end of the soft ferromagnetic wire and a second input contact can be at the other end of the soft ferromagnetic wire to control domain wall position in the soft ferromagnetic wire.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: December 8, 2015
    Assignee: MASSACHUSETTS INSTIUTE OF TECHNOLOGY
    Inventors: Jean Anne Currivan Incorvia, Marc A. Baldo, Caroline A. Ross