Patents by Inventor Elena E. Sheina
Elena E. Sheina 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: 9376529Abstract: High performance organic photovoltaic cells based on donor acceptor polymers in the active layer. A composition comprising: at least one copolymer comprising at least one first donor moiety and at least one first acceptor moiety in the copolymer backbone, wherein the first acceptor moiety comprises at least one first ring which is bivalently linked to the copolymer backbone and at least one second ring fused to the first ring and not bivalently linked to the copolymer backbone, wherein the first ring or the second ring comprises two adjacent fluoro ring substituents, and optionally, wherein the donor comprises at least one fused ring system. High efficiency, high Voc, and a combination of both can be achieved.Type: GrantFiled: December 14, 2011Date of Patent: June 28, 2016Assignee: SOLVAY USA INC.Inventors: Christopher T. Brown, Elena E. Sheina, Ting Xu
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Patent number: 9139688Abstract: Copolymers of 3,4-dialkoxythiophenes are disclosed that are useful as electronics materials. Also disclosed are methods of making these copolymers, as well as compositions and devices incorporating them. Use of these materials in hole injection or hole transport layers is disclosed. Materials comprising these copolymers can be designed to provide solubility in some solvents and intractability in others, which is useful for the construction of multilayer materials for use in electronic devices.Type: GrantFiled: December 17, 2010Date of Patent: September 22, 2015Assignee: SOLVAY USA, INC.Inventors: Venkataramanan Seshadri, Elena E. Sheina
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Publication number: 20150105534Abstract: An improved polymerization method including a method comprising providing a reaction mixture comprising a first monomer, an organic oxidant, and at least one Lewis acid or Brönsted acid, wherein the first monomer comprises at least one optionally substituted heterocyclic ring, wherein the heterocyclic ring comprises at least one heteroatom; and reacting the reaction mixture to obtain a conjugated polymer. The method can reduce the content of undesirable entities in the polymer such as halogens and metals, which can be useful in organic electronic device applications. Purification methods also are adapted to remove organic and inorganic impurities.Type: ApplicationFiled: September 9, 2014Publication date: April 16, 2015Inventors: Elena E. Sheina, Chad Landis, Venkataramanan Seshadri, Christopher T. Brown, Samuel M. Mazza
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Patent number: 8968885Abstract: Polymers which can be used in p-type materials for organic electronic devices and photovoltaic cells. Compounds, monomers, dimers, trimers, and polymers comprising: Good photovoltaic efficiency and lifetime can be achieved. The R group can provide solubility, environmental stability, and fine tuning of spectroscopic and/or electronic properties. Different polymer microstructures can be prepared which encourage multiple band gaps and broad and strong absorptions. The carbonyl can interact with adjacent thiophene rings to provide backbone with rigidity, induce planarity, and reduce and/or eliminate intramolecular chain twisting defects. Polymers comprising benzodithiophene and/or benzothiadiazole structures can show particularly high performance.Type: GrantFiled: September 1, 2010Date of Patent: March 3, 2015Assignee: Solvay USA, Inc.Inventors: Christopher T. Brown, Christophe René Gaston Grenier, Chad Landis, Elena E. Sheina, Atta Gueye
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Patent number: 8859718Abstract: An improved polymerization method including a method comprising providing a reaction mixture comprising a first monomer, an organic oxidant, and at least one Lewis acid or Brönsted acid, wherein the first monomer comprises at least one optionally substituted heterocyclic ring, wherein the heterocyclic ring comprises at least one heteroatom; and reacting the reaction mixture to obtain a conjugated polymer. The method can reduce the content of undesirable entities in the polymer such as halogens and metals, which can be useful in organic electronic device applications. Purification methods also are adapted to remove organic and inorganic impurities.Type: GrantFiled: October 19, 2012Date of Patent: October 14, 2014Assignee: Solvay USA, Inc.Inventors: Elena E. Sheina, Chad Landis, Venkataramanan Seshadri, Christopher T. Brown, Samuel M. Mazza
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Patent number: 8691931Abstract: Polymers which can be used in p-type materials for organic electronic devices and photovoltaic cells. Compounds, monomers, dimers, trimers, and polymers comprising: wherein A1 and A2 each independently comprise a fused ring system comprising at least two fused rings directly covalently linked to the pyrrole rings. Good photovoltaic efficiency and lifetime can be achieved. The R group can provide solubility, environmental stability, and fine tuning of spectroscopic and/or electronic properties. Different polymer microstructures can be prepared which encourage multiple band gaps and broad and strong absorptions. The carbonyl can interact with adjacent thiophene rings to provide backbone with rigidity, induce planarity, and reduce and/or eliminate intramolecular chain twisting defects.Type: GrantFiled: September 1, 2010Date of Patent: April 8, 2014Assignee: Plextronics, Inc.Inventors: Christopher T. Brown, Christophe René Gaston Grenier, Chad Landis, Elena E. Sheina, Ting Xu
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Patent number: 8440785Abstract: A composition comprising a homopolymer or a copolymer comprising bithiophene units for use in, for example, low band gap materials including uses in organic photovoltaic active layers. The band gap and other properties can be engineered by polymerization methods including selection of monomer structure and ratio of monomer components. In addition, a dimer adapted for making alternating copolymers further comprising one first monomer moiety comprising at least one bithiophene moiety compound covalently linked to one second monomer moiety comprising a different bithiophene moiety or at least one moiety that is not a bithiophene. The composition can be copolymerized to form an alternating copolymer that can be further processed to form a polymeric film used in a printed organic electronic device.Type: GrantFiled: June 30, 2010Date of Patent: May 14, 2013Assignee: Plextronics, Inc.Inventors: Christopher T. Brown, Chad Landis, Elena E. Sheina
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Publication number: 20130023621Abstract: Copolymers of 3,4-dialkoxythiophenes are disclosed that are useful as electronics materials. Also disclosed are methods of making these copolymers, as well as compositions and devices incorporating them. Use of these materials in hole injection or hole transport layers is disclosed. Materials comprising these copolymers can be designed to provide solubility in some solvents and intractability in others, which is useful for the construction of multilayer materials for use in electronic devices.Type: ApplicationFiled: December 17, 2010Publication date: January 24, 2013Inventors: Venkataramanan Seshadri, Elena E. Sheina
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Patent number: 8227566Abstract: The present invention relates to polythiophenes, particularly regioregular head-to-tail poly(3-alkylthiophenes) (HT-PATs), block copolymers made therefrom, and their methods of formation. The present invention provides HT-PATs with well-defined, specific end-groups, functionalization of the defined HT-PATs, and incorporation of end group functionalized HT-PATs into block copolymers with structural polymers. The intrinsically conductive diblock and triblock copolymers, formed from the HT-PATs, have excellent conductivity and low polydispersities that are useful in a number of applications. The block copolymers of the present invention have been found to exhibit conductivities that range from a low of 10?8 S/cm for certain applications to as high as several hundred S/cm or more.Type: GrantFiled: March 23, 2005Date of Patent: July 24, 2012Assignee: Carnegie Mellon UniversityInventors: Richard D. McCullough, Jinsong Liu, Paul C. Ewbank, Elena E. Sheina
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Publication number: 20120152357Abstract: High performance organic photovoltaic cells based on donor acceptor polymers in the active layer. A composition comprising: at least one copolymer comprising at least one first donor moiety and at least one first acceptor moiety in the copolymer backbone, wherein the first acceptor moiety comprises at least one first ring which is bivalently linked to the copolymer backbone and at least one second ring fused to the first ring and not bivalently linked to the copolymer backbone, wherein the first ring or the second ring comprises two adjacent fluoro ring substituents, and optionally, wherein the donor comprises at least one fused ring system. High efficiency, high Voc, and a combination of both can be achieved.Type: ApplicationFiled: December 14, 2011Publication date: June 21, 2012Inventors: Christopher T. BROWN, Elena E. Sheina, Ting Xu
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Publication number: 20110204341Abstract: Polymers which can be used in p-type materials for organic electronic devices and photovoltaic cells. Compounds, monomers, dimers, trimers, and polymers comprising: Good photovoltaic efficiency and lifetime can be achieved. The R group can provide solubility, environmental stability, and fine tuning of spectroscopic and/or electronic properties. Different polymer microstructures can be prepared which encourage multiple band gaps and broad and strong absorptions. The carbonyl can interact with adjacent thiophene rings to provide backbone with rigidity, induce planarity, and reduce and/or eliminate intramolecular chain twisting defects. Polymers comprising benzodithiophene and/or benzothiadiazole structures can show particularly high performance.Type: ApplicationFiled: September 1, 2010Publication date: August 25, 2011Inventors: Christopher T. Brown, Christophe René Gaston Grenier, Chad Landis, Elena E. Sheina
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Publication number: 20110114184Abstract: Polymers which can be used in p-type materials for organic electronic devices and photovoltaic cells. Compounds, monomers, dimers, trimers, and polymers comprising: wherein A1 and A2 each independently comprise a fused ring system comprising at least two fused rings directly covalently linked to the pyrrole rings. Good photovoltaic efficiency and lifetime can be achieved. The R group can provide solubility, environmental stability, and fine tuning of spectroscopic and/or electronic properties. Different polymer microstructures can be prepared which encourage multiple band gaps and broad and strong absorptions. The carbonyl can interact with adjacent thiophene rings to provide backbone with rigidity, induce planarity, and reduce and/or eliminate intramolecular chain twisting defects.Type: ApplicationFiled: September 1, 2010Publication date: May 19, 2011Inventors: Christopher T. Brown, Christophe René Gaston Grenier, Chad Landis, Elena E. Sheina, Ting Xu
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Publication number: 20110028644Abstract: A composition comprising a homopolymer or a copolymer comprising bithiophene units for use in, for example, low band gap materials including uses in organic photovoltaic active layers. The band gap and other properties can be engineered by polymerization methods including selection of monomer structure and ratio of monomer components. In addition, a dimer adapted for making alternating copolymers further comprising one first monomer moiety comprising at least one bithiophene moiety compound covalently linked to one second monomer moiety comprising a different bithiophene moiety or at least one moiety that is not a bithiophene. The composition can be copolymerized to form an alternating copolymer that can be further processed to form a polymeric film used in a printed organic electronic device.Type: ApplicationFiled: June 30, 2010Publication date: February 3, 2011Inventors: Christopher T. Brown, Chad Landis, Elena E. Sheina
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Patent number: 7834106Abstract: Regioregular poly(3-alkylthiophenes) and other polythiophenes can be prepared by living polymerization which have good solubility, processability and environmental stability. The polymerization method can afford regioregular poly(3-alkylthiophenes) in high yields. Kinetic study of polymerization revealed the living character of this process. The molecular weight of poly(3-alkylthiophenes) is a function of the molar ratio of the monomer to nickel initiator, and conducting polymers with relatively narrow molecular weight distribution (PDI<1.5) are now readily available. Sequential monomer addition resulted in new block copolymers containing different poly(3-alkylthiophene) segments, which further confirms the “livingness” of this system. Other synthetic methods can be used as well to conduct living polymerization. Blends and electronic devices can be prepared.Type: GrantFiled: October 13, 2008Date of Patent: November 16, 2010Assignee: Carnegie Mellon UniversityInventors: Richard D. McCullough, Elena E. Sheina, Mihaela C. Iovu
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Publication number: 20100273007Abstract: Post-polymerization treatment including dehalogenation of polymeric materials including debromination of polythiophenes. The polymers can be used in organic electronic devices like OLEDs and OPVs. Improved lifetime and stability can result.Type: ApplicationFiled: April 9, 2010Publication date: October 28, 2010Inventor: Elena E. SHEINA
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Patent number: 7790979Abstract: Regioregular polythiophene polymers can be used in photovoltaic applications including copolymers and blends. The polymer can comprise heteroatoms in the side groups. Better efficiencies can be achieved.Type: GrantFiled: September 26, 2005Date of Patent: September 7, 2010Assignee: Plextronics, Inc.Inventors: Shawn P. Williams, Darin W. Laird, Troy D. Hammond, Andrew W. Hannah, Elena E. Sheina, Shijun Jia
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Publication number: 20090221740Abstract: A composition comprising a copolymer comprising DTP units for use in, for example, low band gap materials including uses in organic photovoltaic active layers. The band gap and other properties can be engineered by copolymerization methods including selection of monomer structure and ratio of monomer components. In addition, a dimer adapted for making alternating copolymers further comprising one first monomer moiety comprising at least one DTP moiety compound covalently linked to one second monomer moiety comprising at least one non-DTP moiety or a different DTP moiety. The composition can be copolymerized to form an alternating copolymer that can be further processed to form a polymeric film used in a printed organic electronic device.Type: ApplicationFiled: February 13, 2009Publication date: September 3, 2009Inventor: Elena E. Sheina
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Publication number: 20090043052Abstract: Regioregular poly(3-alkylthiophenes) and other polythiophenes can be prepared by living polymerization which have good solubility, processability and environmental stability. The polymerization method can afford regioregular poly(3-alkylthiophenes) in high yields. Kinetic study of polymerization revealed the living character of this process. The molecular weight of poly(3-alkylthiophenes) is a function of the molar ratio of the monomer to nickel initiator, and conducting polymers with relatively narrow molecular weight distribution (PDI<1.5) are now readily available. Sequential monomer addition resulted in new block copolymers containing different poly(3-alkylthiophene) segments, which further confirms the “livingness” of this system. Other synthetic methods can be used as well to conduct living polymerization. Blends and electronic devices can be prepared.Type: ApplicationFiled: October 13, 2008Publication date: February 12, 2009Inventors: Richard D. McCullough, Elena E. Sheina, Mihaela C. Iovu
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Patent number: RE40813Abstract: The present invention relates to polythiophenes, particularly regioregular head-to-tail poly(3-alkylthiophenes) (HT-PATs), block copolymers made therefrom, and their methods of formation. The present invention provides HT-PATs with well-defined, specific end-groups, functionalization of the defined HT-PATs, and incorporation of end group functionalized HT-PATs into block copolymers with structural polymers. The intrinsically conductive diblock and triblock copolymers, formed from the HT-PATs, have excellent conductivity and low polydispersities that are useful in a number of applications. The block copolymers of the present invention have been found to exhibit conductivities that range from a low of 10?8 S/cm for certain applications to as high as several hundred S/cm or more.Type: GrantFiled: August 4, 2005Date of Patent: June 30, 2009Assignee: Carnegie Mellon UniversityInventors: Richard D. McCullough, Jinsong Liu, Paul C. Ewbank, Elena E. Sheina
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Patent number: RE41587Abstract: The present invention relates to polythiophenes, particularly regioregular head-to-tail poly(3-alkylthiophenes) (HT-PATs), block copolymers made therefrom, and their methods of formation. The present invention provides HT-PATs with well-defined, specific end-groups, functionalization of the defined HT-PATs, and incorporation of end group functionalized HT-PATs into block copolymers with structural polymers. The intrinsically conductive diblock and triblock copolymers, formed from the HT-PATs, have excellent conductivity and low polydispersities that are useful in a number of applications. The block copolymers of the present invention have been found to exhibit conductivities that range from a low of 10?8 S/cm for certain applications to as high as several hundred S/cm or more.Type: GrantFiled: May 2, 2007Date of Patent: August 24, 2010Assignee: Carnegie Mellon UniversityInventors: Richard D. McCullough, Jinsong Liu, Paul C. Ewbank, Elena E. Sheina