Patents by Inventor Marina E. Kondakova
Marina E. Kondakova 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: 9634256Abstract: An OLED device comprises a cathode, an anode, and has therebetween a light emitting layer (LEL) comprising a phosphorescent emitting compound disposed in a host comprising a mixture of at least one electron transporting co-host which is a benzophenone derivative with a spiro substituent and at least one hole transporting co-host which is a triphenylamine which contains one trivalent nitrogen atom that is bonded only to carbon atoms, at least one of which is a member of an aromatic ring, wherein there is present an electron transporting layer contiguous to the LEL (HBL?) on the cathode side comprising an anthracene or a fluoranthene and wherein there is present an election injecting layer comprising a phenanthroline or a lithium quinolate contiguous to the cathode.Type: GrantFiled: July 9, 2015Date of Patent: April 25, 2017Inventors: Marina E. Kondakova, Denis Y. Kondakov, Christopher T. Brown, Tukaram K. Hatwar, Jeffrey P. Spindler, William J. Begley
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Publication number: 20150311447Abstract: An OLED device comprises a cathode, an anode, and has therebetween a light emitting layer (LEL) comprising a phosphorescent emitting compound disposed in a host comprising a mixture of at least one electron transporting co-host which is a benzophenone derivative with a spiro substituent and at least one hole transporting co-host which is a triphenylamine which contains one trivalent nitrogen atom that is bonded only to carbon atoms, at least one of which is a member of an aromatic ring, wherein there is present an electron transporting layer contiguous to the LEL (HBL?) on the cathode side comprising an anthracene or a fluoranthene and wherein there is present an election injecting layer comprising a phenanthroline or a lithium quinolate contiguous to the cathode.Type: ApplicationFiled: July 9, 2015Publication date: October 29, 2015Inventors: Marina E. KONDAKOVA, Denis Y. KONDAKOV, Christopher T. BROWN, Tukaram K. HATWAR, Jeffrey P. Spindler, William J. Begley
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Patent number: 9118020Abstract: An OLED device comprises a cathode, an anode, and has therebetween a light emitting layer (LEL) comprising a phosphorescent emitting compound disposed in a host comprising a mixture of at least one electron transporting co-host which is a benzophenone derivative with a spiro substituent and at least one hole transporting co-host which is a triphenylamine which contains one trivalent nitrogen atom that is bonded only to carbon atoms, at least one of which is a member of an aromatic ring, wherein there is present an electron transporting layer contiguous to the LEL (HBL?) on the cathode side comprising an anthracene or a fluoranthene and wherein there is present an election injecting layer comprising a phenanthroline or a lithium quinolate contiguous to the cathode.Type: GrantFiled: December 9, 2009Date of Patent: August 25, 2015Assignee: Global OLED Technology LLCInventors: Marina E. Kondakova, Denis Y. Kondakov, Christopher T. Brown, Tukaram K. Hatwar, Jeffrey P. Spindler, William J. Begley
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Patent number: 8324800Abstract: An OLED device comprises a cathode, an anode, and has therebetween a light-emitting layer containing a phosphorescent emitter that emits yellow, orange or red light; a tertiary arylamine compound as a first host material, and a gallium complex with only nitrogen bidentate ligands as a second host material. Desirably, the phosphorescent emitter is an iridium complex.Type: GrantFiled: June 12, 2008Date of Patent: December 4, 2012Assignee: Global OLED Technology LLCInventors: Tommie L. Royster, Jr., Marina E. Kondakova
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Patent number: 8242489Abstract: The invention provides an OLED device comprising an anode, a cathode and a light-emitting layer located therebetween, said light-emitting layer comprising an anthracene host and a styrylamine blue light-emitting compound; and, located between the said light-emitting layer and the cathode, a first electron-transporting layer that is greater than 0.5 nm and less than 5 nm thick; and a second electron-transporting layer consisting essentially of an anthracene located between the first electron-transporting layer and the cathode. The first electron-transporting layer includes a compound with a less negative LUMO level than the anthracene in the second electron-transporting layer. Devices of the invention provide improvement in features such as efficiency.Type: GrantFiled: December 17, 2009Date of Patent: August 14, 2012Assignee: Global OLED Technology, LLC.Inventors: Marina E. Kondakova, Ralph H. Young
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Patent number: 8147989Abstract: The invention provides an OLED device including an anode, a cathode and a green light-emitting layer located therebetween, said light-emitting layer including an anthracene host, a bis-diarylamine 9,10-substituted anthracene and a stabilizer compound which is selected from a quinacridone or a biphenylstyrylamine. Devices of the invention provide improvement in features such as stability and efficiency while maintaining excellent color.Type: GrantFiled: February 27, 2009Date of Patent: April 3, 2012Assignee: Global OLED Technology LLCInventors: Marina E. Kondakova, Kevin P. Klubek, Margaret J. Helber, Peter G. Bessey, J. Ramon Vargas, Michele L. Ricks
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Patent number: 8057917Abstract: An OLED device comprising, in sequence, an anode, a light-emitting layer that comprises a phosphorescent light-emitting organometallic compound, a hole-blocking layer, and a cathode, and between the hole-blocking layer and the cathode, a further layer containing a mixture of a first compound that is a tetracene compound that has the lowest LUMO value of the compounds in the layer, in an amount greater than or equal to 10% and less than 90% and a second compound that is a low voltage electron transport material, exhibiting a higher LUMO value than the first compound in an amount less than or equal to 90% and more than 10%.Type: GrantFiled: May 16, 2008Date of Patent: November 15, 2011Assignee: Global OLED Technology LLCInventors: William J. Begley, Tukaram K. Hatwar, Joseph C. Deaton, Christopher T. Brown, Natasha Andrievsky, Marina E. Kondakova
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Publication number: 20110147716Abstract: The invention provides an OLED device comprising an anode, a cathode and a light-emitting layer located therebetween, said light-emitting layer comprising an anthracene host and a styrylamine blue light-emitting compound; and, located between the said light-emitting layer and the cathode, a first electron-transporting layer that is greater than 0.5 nm and less than 5 nm thick; and a second electron-transporting layer consisting essentially of an anthracene located between the first electron-transporting layer and the cathode. The first electron-transporting layer includes a compound with a less negative LUMO level than the anthracene in the second electron-transporting layer. Devices of the invention provide improvement in features such as efficiency.Type: ApplicationFiled: December 17, 2009Publication date: June 23, 2011Inventors: MARINA E. KONDAKOVA, Ralph H. Young
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Publication number: 20100219748Abstract: The invention provides an OLED device including an anode, a cathode and a green light-emitting layer located therebetween, said light-emitting layer including an anthracene host, a bis-diarylamine 9,10-substituted anthracene and a stabilizer compound which is selected from a quinacridone or a biphenylstyrylamine. Devices of the invention provide improvement in features such as stability and efficiency while maintaining excellent color.Type: ApplicationFiled: February 27, 2009Publication date: September 2, 2010Inventors: Marina E. Kondakova, Kevin P. Klubek, Margaret J. Helber, Peter G. Bessey, J. R. Vargas, Michele L. Ricks
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Patent number: 7767316Abstract: An organic light emitting device contains a cathode, an anode, and has located there-between a light emitting layer, comprising co-hosts including a hole transporting compound and a particular aluminum chelate, together with at least one light emitting Iridium compound, wherein the Iridium compound is a tris C^N-cyclometallated complex with a triplet energy less than or equal to the triplet energy of each of the co-hosts.Type: GrantFiled: December 17, 2004Date of Patent: August 3, 2010Assignee: Global OLED Technology LLCInventors: Joseph C. Deaton, Christopher T. Brown, David W. Place, Marina E. Kondakova, Shouquan Huo
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Publication number: 20100084647Abstract: An OLED device comprises a cathode, an anode, and has therebetween a light emitting layer (LEL) comprising a phosphorescent emitting compound disposed in a host comprising a mixture of at least one electron transporting co-host which is a benzophenone derivative with a spiro substituent and at least one hole transporting co-host which is a triphenylamine which contains one trivalent nitrogen atom that is bonded only to carbon atoms, at least one of which is a member of an aromatic ring, wherein there is present an electron transporting layer contiguous to the LEL (HBL?) on the cathode side comprising an anthracene or a fluoranthene and wherein there is present an election injecting layer comprising a phenanthroline or a lithium quinolate contiguous to the cathode.Type: ApplicationFiled: December 9, 2009Publication date: April 8, 2010Inventors: MARINA E. KONDAKOVA, Denis Y. Kondakov, Christopher T. Brown, Tukaram K. Hatwar, Jeffrey P. Spindler
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Publication number: 20090309487Abstract: An OLED device comprises a cathode, an anode, and has therebetween a light-emitting layer containing a phosphorescent emitter that emits yellow, orange or red light; a tertiary arylamine compound as a first host material, and a gallium complex with only nitrogen bidentate ligands as a second host material. Desirably, the phosphorescent emitter is an iridium complex.Type: ApplicationFiled: June 12, 2008Publication date: December 17, 2009Inventors: Tommie L. Royster, JR., Marina E. Kondakova
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Patent number: 7597967Abstract: An electroluminescent device comprises a cathode and an anode; and, located therebetween, a light-emitting layer (LEL) comprising at least one hole transporting co-host and at least one electron transporting co-host, together with at least one phosphorescent emitter, and wherein the triplet energy of each of the co-host materials is greater than the triplet energy of the phosphorescent emitter, and further containing an exciton blocking layer comprising a hole transporting material with triplet energy greater or equal to 2.5 eV adjacent the emitting layer on the anode side. The invention provides devices that emit light with high luminous efficiency at low voltage.Type: GrantFiled: December 17, 2004Date of Patent: October 6, 2009Assignee: Eastman Kodak CompanyInventors: Marina E. Kondakova, Joseph C. Deaton, Christopher T. Brown, Kevin P. Klubek, Shouquan Huo
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Patent number: 7585363Abstract: A method for preparing a nanodispersion comprising the steps of: (i) introducing into a milling apparatus a solid fluorinated phthalocycanine pigment according to Formula (I): Wherein M is a metal cation chosen from Groups 1b, 2b, 2a or 3a of the Periodic Table of the Elements; R is fluorine, a perfluoroalkyl or a perfluoroaryl group; z is 1 to 4; L is an anionic ligand; and n is 0 or 1 such that the overall charge on the molecular unit is neutral; followed by milling with agitation the solid fluorinated phthalocyanine in an organic solvent into a suspension of particles so that at least 80 volume % of the particles have a particle size of less than 100 nm.Type: GrantFiled: October 29, 2008Date of Patent: September 8, 2009Assignee: Eastman Kodak CompanyInventors: Tommie L. Royster, Jr., Marina E. Kondakova, Peter G. Bessey
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Patent number: 7579090Abstract: An OLED device contains a layer comprising a hole transporting compound, a certain type of oxinoid compound, and a light emitting phosphorescent compound.Type: GrantFiled: December 17, 2004Date of Patent: August 25, 2009Assignee: Eastman Kodak CompanyInventors: Christopher T. Brown, Joseph C. Deaton, David W. Place, Marina E. Kondakova, Shouquan Huo
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Publication number: 20080286610Abstract: An electroluminescent device comprises a cathode and an anode; and located therebetween, a fluorescent light-emitting layer (LEL) comprising at least one fluorescent emitter and a host, together with at least one phosphorescent light-emitting layer comprising at least one phosphorescent emitter and a host, and having a spacer layer interposed between the fluorescent and phosphorescent light-emitting layers. The materials within these layers are selected so that the triplet energy levels of certain components satisfy certain interrelationships. The invention provides devices that emit light with high luminous efficiency at low voltage.Type: ApplicationFiled: May 17, 2007Publication date: November 20, 2008Inventors: Joseph C. Deaton, Marina E. Kondakova, David J. Giesen, William J. Begley, Denis Y. Kondakov
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Publication number: 20080258615Abstract: An OLED device comprising, in sequence, an anode, a light-emitting layer that comprises a phosphorescent light-emitting organometallic compound, a hole-blocking layer, and a cathode, and between the hole-blocking layer and the cathode, a further layer containing a mixture of a first compound that is a tetracene compound that has the lowest LUMO value of the compounds in the layer, in an amount greater than or equal to 10% and less than 90% and a second compound that is a low voltage electron transport material, exhibiting a higher LUMO value than the first compound in an amount less than or equal to 90% and more than 10%.Type: ApplicationFiled: May 16, 2008Publication date: October 23, 2008Inventors: William J. Begley, Tukaram K. Hatwar, Joseph C. Deaton, Christopher T. Brown, Natasha Andrievsky, Marina E. Kondakova
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Patent number: 7374828Abstract: Disclosed is an electroluminescent device comprising a cathode and an anode and, located therebetween, a light-emitting layer (LEL) comprising a phosphorescent guest material, a hole- and electron-transporting host material, and an efficiency-enhancing material having an ionization potential lower than that of the host material and a triplet energy level that is lower than that of the phosphorescent guest material by no more than 0.2 eV. Such a device provides useful light emission features.Type: GrantFiled: December 5, 2003Date of Patent: May 20, 2008Assignee: Eastman Kodak CompanyInventors: Marina E. Kondakova, Ralph H. Young
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Patent number: 7084425Abstract: Disclosed is an electroluminescent device comprising a cathode and an anode; and, located therebetween, a light-emitting layer (LEL) comprising a phosphorescent green-light-emitting material and a host material for the light-emitting material, and in a layer adjacent to the LEL on the anode side, an exciton-blocking layer containing a compound having a hole mobility of at least 1×10?3 cm2V?1s?1 and a triplet energy exceeding that of the green-light-emitting material of the LEL. Such a device provides useful light emission.Type: GrantFiled: December 5, 2003Date of Patent: August 1, 2006Assignee: Eastman Kodak CompanyInventors: Marina E. Kondakova, Ralph H. Young