Patents by Inventor Peter Djurovich

Peter Djurovich 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: 7011897
    Abstract: An organic light emitting device is provided. The device has an anode, a cathode, and an emissive layer disposed between the anode and the cathode, the emissive layer further comprising an emissive material having the structure: wherein each of the variables are defined herein.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: March 14, 2006
    Assignees: The University of Southern California, Universal Display Corporation
    Inventors: Mark E. Thompson, Peter Djurovich, Raymond Kwong, Yeh-Jiun Tung, David B. Knowles, Jason Brooks, Robert W. Walters, Bin Ma
  • Publication number: 20060029829
    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: September 22, 2005
    Publication date: February 9, 2006
    Inventors: Mark Thompson, Peter Djurovich, Sergey Lamansky, Drew Murphy, Raymond Kwong, Feras Abdel-Razzaq, Stephen Forrest, Marc Baldo, Paul Burrows
  • Publication number: 20060024526
    Abstract: The present invention relates to organic light emitting devices (OLEDs), and more specifically to efficient OLEDs having electron blocking layers. The devices of the present invention comprise at least one electron blocking layer which functions to confine electrons to specific regions of the light emitting devices. The present invention also relates to materials for use as electron blockers that show increased stability when incorporated into an organic light emitting device.
    Type: Application
    Filed: September 19, 2005
    Publication date: February 2, 2006
    Inventors: Mark Thompson, Vadim Adamovich, Xiaofan Ren, Arnold Tamayo, Peter Djurovich
  • Publication number: 20050260448
    Abstract: An organic light emitting device having an anode, a cathode and an organic layer between the anode and the cathode is provided. The organic layer comprises a carbene-metal complex having the structure: where R may be halo, hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and additionally or alternatively, two or more R groups on the same ring form independently a 5 or 6-member cyclic group, which may be cycloalkyl, cycloheteroalkyl, aryl or heteroaryl; and which may be substituted by one or more substituents J; and J may be R?, CN, CF3, C(O)OR?, C(O)R?, C(O)NR?2, NR?2, NO2, OR?, SR?, SO2, SOR?, or SO3R?, and additionally or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group; each R? may be halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl and heteroaryl.
    Type: Application
    Filed: January 10, 2005
    Publication date: November 24, 2005
    Inventors: Chun Lin, Jui-Yi Tsai, Jason Brooks, Bert Alleyne, Mark Thompson, Peter Djurovich, Arnold Tamayo, Tissa Sajoto, Robert Walters
  • Publication number: 20050258433
    Abstract: An organic light emitting device having an anode, a cathode and an organic layer disposed between the anode and the cathode is provided. In one aspect, the organic layer comprises a compound having at least one zwitterionic carbon donor ligand.
    Type: Application
    Filed: January 10, 2005
    Publication date: November 24, 2005
    Inventors: Peter Djurovich, Jui-Yi Tsai, Chun Lin, Jason Brooks, Bert Alleyne, Mark Thompson, Peter MacKenzie, Bin Ma
  • Publication number: 20050260441
    Abstract: An organic light emitting device is provided. The device has an anode, a cathode and an organic layer disposed between the anode and the cathode. The organic layer comprises a compound further comprising one or more carbene ligands coordinated to a metal center.
    Type: Application
    Filed: May 18, 2004
    Publication date: November 24, 2005
    Inventors: Mark Thompson, Arnold Tamayo, Peter Djurovich, Tissa Sajoto
  • Publication number: 20050260447
    Abstract: An organic light emitting device is provided. The device has an anode, a cathode and an organic layer disposed between the anode and the cathode.
    Type: Application
    Filed: January 10, 2005
    Publication date: November 24, 2005
    Inventors: Jason Brooks, Xiao-Chang Li, Bert Alleyne, Mark Thompson, Peter Djurovich, Arnold Tamayo
  • Publication number: 20050214576
    Abstract: Emissive phosphorescent organometallic compounds are described that produce improved electroluminescence, particularly in the blue region of the visible spectrum. Organic light emitting devices employing such emissive phosphorescent organometallic compounds are also described. Also described is an organic light emitting layer including a host material having a lowest triplet excited state having a decay rate of less than about 1 per second; a guest material dispersed in the host material, the guest material having a lowest triplet excited state having a radiative decay rate of greater than about 1×105 or about 1×106 per second and wherein the energy level of the lowest triplet excited state of the host material is lower than the energy level of the lowest triplet excited state of the guest material.
    Type: Application
    Filed: May 3, 2005
    Publication date: September 29, 2005
    Inventors: Sergey Lamansky, Mark Thompson, Vadim Adamovich, Peter Djurovich, Chihaya Adachi, Marc Baldo, Stephen Forrest, Raymond Kwong
  • Publication number: 20050211974
    Abstract: The present invention generally relates to organic photosensitive optoelectronic devices. More specifically, it is directed to organic photovoltaic devices, e.g., organic solar cells. More specifically, it is directed to organic photosensitive optoelectronic devices that comprise a cyclometallated organometallic compound as a light absorbing material.
    Type: Application
    Filed: March 26, 2004
    Publication date: September 29, 2005
    Inventors: Mark Thompson, Peter Djurovich
  • Publication number: 20050176624
    Abstract: A series of organometallic complexes and the singlet oxygen sensitization properties of these complexes are provided. Complexes with acetylacetonate ligands give singlet oxygen quantum yields near unity, whether exciting the ligand-based state or the lowest energy excited state (MLCT+3LC). The singlet oxygen quenching rates for these ?-diketonate complexes are small, roughly three orders of magnitude slower than the corresponding phosphorescence quenching rate. Similar complexes were prepared with glycine or pyridine tethered to the Ir(III) center (i.e. (bsn)2Ir(gly) and (bt)2Ir(py)Cl, where gly=glycine, and py=pyridine). The glycine and pyridine derivatives give high singlet oxygen yields.
    Type: Application
    Filed: August 6, 2004
    Publication date: August 11, 2005
    Inventors: Mark Thompson, Peter Djurovich, Drew Murphy, Matthias Selke
  • Publication number: 20050164031
    Abstract: An organic light emitting device is provided. The device has an anode, a cathode, and an emissive layer disposed between and electrically connected to the anode and the cathode. The emissive layer further comprises a compound having two metal centers, in which each metal has an atomic weight greater than 40. A bridging ligand, small molecule, or polymer is coordinated to both metal centers, and at least one photoactive ligand is bound to each metal. In one embodiment, the transition dipole moment of the photoactive ligand bound to the first metal is orthogonal to the photoactive ligand bound to the second metal. In another embodiment, the first metal center and the atoms of the bridging ligand that are coordinated to the first metal center form a plane and the atoms of the bridging ligand that are coordinated to the second metal center form another plane, and the planes form an angle that is between about 80 degrees and 100 degrees. In another embodiment, the bridging ligand is diacetylacetonate.
    Type: Application
    Filed: March 24, 2004
    Publication date: July 28, 2005
    Inventors: Mark Thompson, Biwu Ma, Peter Djurovich
  • Publication number: 20050119485
    Abstract: An organic light emitting device is provided. The device has an anode, a cathode, and an emissive layer disposed between the anode and the cathode. The emissive layer further comprising an emissive material having the structure: M is a metal having an atomic weight greater than 40. R5 is an aromatic group. The emissive material itself is also provided. The emissive material provides an improved stability and efficiency.
    Type: Application
    Filed: December 3, 2004
    Publication date: June 2, 2005
    Inventors: Cory Brown, David Knowles, Raymond Kwong, Yeh-Jiun Tung, Robert Walters, Peter Djurovich, Mark Thompson
  • Publication number: 20040262576
    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: June 16, 2004
    Publication date: December 30, 2004
    Inventors: Mark E. Thompson, Peter Djurovich, Sergey Lamansky, Drew Murphy, Raymond Kwong, Feras Abdel-Razzaq, Stephen R. Forrest, Marc A. Baldo, Paul E. Burrows
  • Publication number: 20040253478
    Abstract: An organic light emitting device is provided, having an anode, a cathode, and an emissive layer disposed between the anode and the cathode.
    Type: Application
    Filed: March 24, 2004
    Publication date: December 16, 2004
    Inventors: Mark E. Thompson, Arnold Tamayo, Peter Djurovich
  • Patent number: 6830828
    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: June 18, 2001
    Date of Patent: December 14, 2004
    Assignees: The Trustees of Princeton University, The University of Southern California
    Inventors: Mark E. Thompson, Peter Djurovich, Sergey Lamansky, Stephen R. Forrest, Marc A. Baldo, Paul E. Burrows
  • Publication number: 20040209115
    Abstract: The present invention relates to organic light emitting devices (OLEDs), and more specifically to efficient OLEDs having an emissive layer having host material with a wide energy gap. The present invention also relates to materials for use as a wide gap host material.
    Type: Application
    Filed: April 21, 2003
    Publication date: October 21, 2004
    Inventors: Mark E. Thompson, Peter Djurovich, Xiaofan Ren, Russell J. Holmes, Stephen R. Forrest
  • Publication number: 20040197600
    Abstract: Devices are provided having an anode, a cathode, and an emissive layer disposed between and electrically connected to the anode and the cathode. The emissive layer includes an emissive material having more than one metal center. In one embodiment, first and second metal centers are independently selected from the group consisting of d7, d8 and d9 metals. A bridging ligand is coordinated to the first metal center and to the second metal center. In one embodiment, the first and second metal centers each have coordination numbers of at least 3, and more preferably each have coordination numners of 4. In one embodiment, photoactive ligands are coordinated to the first and second metal centers. In one embodiment, there are no photoactive ligands. In one embodiment, a charge neutral bi-nuclear emissive material is provided. In one embodiment the first and metal centers have a co-facial configuration, and preferably a square planar co-facial configuration.
    Type: Application
    Filed: April 1, 2003
    Publication date: October 7, 2004
    Applicant: THE UNIVERSITY OF SOUTHERN CALIFORNIA,
    Inventors: Mark E. Thompson, Bert Alleyne, Peter Djurovich
  • Publication number: 20040121184
    Abstract: An organic light emitting device is provided.
    Type: Application
    Filed: August 18, 2003
    Publication date: June 24, 2004
    Inventors: Mark E. Thompson, Peter Djurovich, Raymond Kwong, Yeh-Jiun Tung, David B. Knowles, Jason Brooks, Robert W. Walters
  • Publication number: 20040102632
    Abstract: Emissive phosphorescent organometallic compounds that produce electroluminescence and organic light emitting devices employing such emissive phosphorescent organometallic compounds are provided. More specifically the present invention is directed to novel primarily non-emitting ligands which produce a blue shift in emitted light when associated with a cyclometallated ligand.
    Type: Application
    Filed: August 18, 2003
    Publication date: May 27, 2004
    Inventors: Mark E. Thompson, Peter Djurovich, Jian Li
  • Publication number: 20030059647
    Abstract: Light emitting devices having charge transporting layers comprising one or more metal complexes are provided. More particularly, devices include hole transporting layers comprising at least one metal complex are disclosed. The present devices can further comprise an electron blocking layer for improved efficiency.
    Type: Application
    Filed: August 23, 2002
    Publication date: March 27, 2003
    Inventors: Mark E. Thompson, Xiaofan Ren, Peter Djurovich, Haiping Hong, Stephen R. Forrest, Chihaya Adachi