Patents by Inventor Jonathan S. Steckel
Jonathan S. Steckel 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: 20150004775Abstract: Disclosed is a method for preparing a semiconductor nanocrystal, comprising: forming a reaction mixture comprising injecting one or more first semiconductor nanocrystal precursors including one or more Group V elements and one or more Group VI elements into a mixture including one or more second semiconductor nanocrystal precursors including one or more Group II elements and one or more Group III elements at a first temperature; and reacting the first and second semiconductor nanocrystal precursors in the reaction mixture at a second temperature for a period time sufficient to form a semiconductor nanocrystal core comprising at least a portion of the one or more Group II elements, one or more Group III elements, one or more Group V elements, and one or more Group VI elements included in the first and second semiconductor nanocrystal precursors, wherein the second temperature is greater than the first temperature.Type: ApplicationFiled: June 4, 2014Publication date: January 1, 2015Inventors: DIYUN HUANG, JONATHAN S. STECKEL
-
Patent number: 8906265Abstract: A semiconductor nanocrystal capable of emitting blue light upon excitation. Also disclosed are devices, populations of semiconductor nanocrystals, and compositions including a semiconductor nanocrystal capable of emitting blue light upon excitation. In one embodiment, a semiconductor nanocrystal capable of emitting blue light including a maximum peak emission at a wavelength not greater than about 470 nm with a photoluminescence quantum efficiency greater than about 65% upon excitation. In another embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting blue light with a photoluminescence quantum efficiency greater than about 65% upon excitation.Type: GrantFiled: March 25, 2013Date of Patent: December 9, 2014Assignee: QD Vision, Inc.Inventors: Craig Breen, Jonathan S. Steckel, Dorai Ramprasad
-
Publication number: 20140322901Abstract: A method for preparing semiconductor nanocrystals includes adding a non-protonated surface modification agent to semiconductor nanocrystal cores in a liquid medium to form a mixture; adding one or more precursors for forming a shell including a semiconductor material to the mixture under conditions for forming the shell over at least a portion of an outer surface of the cores, and adding an acid ligand to the mixture after addition of at least a portion of the one or more precursors. Semiconductor nanocrystals, other methods of making semiconductor nanocrystals, compositions and products including semiconductor nanocrystals are also disclosed.Type: ApplicationFiled: February 28, 2014Publication date: October 30, 2014Applicant: QD VISION, INC.Inventors: DIYUN HUANG, CHUNMING WANG, ZHIMING WANG, JONATHAN S. STECKEL
-
Publication number: 20140312300Abstract: A semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light with an improved photoluminescence quantum efficiency. Also disclosed are populations of semiconductor nanocrystals, compositions and devices including a semiconductor nanocrystal capable of emitting light with an improved photoluminescence quantum efficiency. In one embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light upon excitation with a photoluminescence quantum efficiency greater than about 65%.Type: ApplicationFiled: April 7, 2014Publication date: October 23, 2014Applicant: QD VISION, INC.Inventors: DORAI RAMPRASAD, CRAIG BREEN, JONATHAN S. STECKEL
-
Patent number: 8849087Abstract: The present inventions relate to optical components which include quantum confined semiconductor nanoparticles, wherein at least a portion of the nanoparticles include a ligand attached to a surface thereof, the ligand being represented by the formula: X-Sp-Z, wherein: X represents a primary amine group, a secondary amine group, a urea, a thiourea, an imidizole group, an amide group, an other nitrogen containing group, a carboxylic acid group, a phosphonic or arsonic acid group, a phosphinic or arsinic acid group, a phosphate or arsenate group, a phosphine or arsine oxide group; Sp represents a spacer group, such as a group capable of allowing a transfer of charge or an insulating group; and Z represents: (i) a reactive group capable of communicating specific chemical properties to the nanocrystal as well as provide specific chemical reactivity to the surface of the nanocrystal, and/or (ii) a group that is cyclic, halogenated, or polar a-protic.Type: GrantFiled: December 22, 2009Date of Patent: September 30, 2014Assignee: QD Vision, Inc.Inventors: Craig Breen, John R. Linton, Jonathan S. Steckel, Marshall Cox, Seth Coe-Sullivan, Mark Comerford
-
Patent number: 8845927Abstract: A nanoparticle has a semiconductor nanocrystal capable of emitting light. The nanoparticle further includes a ligand attached to a surface of the coating. The ligand is represented by the formula: X-Sp-Z, wherein X represents, e.g., a primary amine group, a secondary amine group, a urea, a thiourea, an imidizole group, an amide group, a phosphonic or arsonic acid group, a phosphinic or arsinic acid group, a phosphate or arsenate group, a phosphine or arsine oxide group; Sp represents a spacer group, such as a group capable of allowing a transfer of charge or an insulating group; and Z represents: (i) reactive group capable of communicating specific chemical properties to the nanocrystal as well as provide specific chemical reactivity to the surface of the nanocrystal, and/or (ii) a group that is cyclic, halogenated, or polar a-protic.Type: GrantFiled: March 11, 2010Date of Patent: September 30, 2014Assignee: QD Vision, Inc.Inventors: Craig Breen, Marshall Cox, Jonathan S. Steckel
-
Patent number: 8718437Abstract: A composition useful for altering the wavelength of visible or invisible light is disclosed. The composition comprising a solid host material and quantum confined semiconductor nanoparticles, wherein the nanoparticles are included in the composition in amount in the range from about 0.001 to about 15 weight percent based on the weight of the host material. The composition can further include scatterers. An optical component including a waveguide component and quantum confined semiconductor nanoparticles is also disclosed. A device including an optical component is disclosed. A system including an optical component including a waveguide component and quantum confined semiconductor nanoparticles and a light source optically coupled to the waveguide component is also disclosed. A decal, kit, ink composition, and method are also disclosed. A TFEL including quantum confined semiconductor nanoparticles on a surface thereof is also disclosed.Type: GrantFiled: September 12, 2008Date of Patent: May 6, 2014Assignee: QD Vision, Inc.Inventors: Seth Coe-Sullivan, John R. Linton, Craig Breen, Jonathan S. Steckel, Mark Comerford, Rohit Modi
-
Patent number: 8691114Abstract: A composition comprising a semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light upon excitation with a photoluminescence quantum efficiency greater than about 65%. Also disclosed is a composition comprising a semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material comprising at least three chemical elements, wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 60% upon excitation.Type: GrantFiled: February 15, 2013Date of Patent: April 8, 2014Assignee: QD Vision, Inc.Inventors: Dorai Ramprasad, Craig Breen, Jonathan S. Steckel
-
Publication number: 20140027711Abstract: A quantum dot including a fluorine-containing ligand attached to a surface thereof and having a coating comprising a fluoropolymer over at least a portion of the outer surface of the quantum dot. A method for preparing a quantum dot with a coating comprising a fluoropolymer over at least a portion of the outer surface of the quantum dot is also disclosed. The method comprises contacting a quantum dot having a fluorine-containing ligand attached to a surface thereof with a fluoropolymer to coat the fluoropolymer over at least a portion of the outer surface of the quantum dot. A device including the quantum dot taught herein is further disclosed. An emissive material including the quantum dot taught herein is further disclosed.Type: ApplicationFiled: September 30, 2013Publication date: January 30, 2014Applicant: QD Vision, Inc.Inventors: Craig Breen, Jonathan S. Steckel
-
Publication number: 20140027713Abstract: A method for making a device, the method comprising: depositing a layer comprising quantum dots over a first electrode, the quantum dots including ligands attached to the outer surfaces thereof; treating the surface of the deposited layer comprising quantum dots to remove the exposed ligands; and forming a device layer thereover. Also disclosed is a device made in accordance with the disclosed method. Another aspect of the invention relates to a device comprising a first electrode and a second electrode, and a layer comprising quantum dots between the two electrodes, the layer comprising quantum dots deposited from a dispersion that have been treated to remove exposed ligands after formation of the layer in the device.Type: ApplicationFiled: September 30, 2013Publication date: January 30, 2014Applicant: QD Vision, Inc.Inventors: Marshall Cox, Craig Breen, Zhaoqun Zhou, Jonathan S. Steckel
-
Patent number: 8541810Abstract: A semiconductor nanocrystal includes a core including a first semiconductor material and an overcoating including a second semiconductor material. A monodisperse population of the nanocrystals emits blue light over a narrow range of wavelengths with a high quantum efficiency.Type: GrantFiled: November 16, 2011Date of Patent: September 24, 2013Assignee: Massachusettts Institute of TechnologyInventors: Jonathan S. Steckel, John P. Zimmer, Seth Coe-Sullivan, Nathan E. Stott, Vladimir Bulović, Moungi G. Bawendi
-
Publication number: 20130234109Abstract: A semiconductor nanocrystal capable of emitting blue light upon excitation. Also disclosed are devices, populations of semiconductor nanocrystals, and compositions including a semiconductor nanocrystal capable of emitting blue light upon excitation. In one embodiment, a semiconductor nanocrystal capable of emitting blue light including a maximum peak emission at a wavelength not greater than about 470 nm with a photoluminescence quantum efficiency greater than about 65% upon excitation. In another embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting blue light with a photoluminescence quantum efficiency greater than about 65% upon excitation.Type: ApplicationFiled: March 25, 2013Publication date: September 12, 2013Applicant: QD Vision, Inc.Inventors: Craig Breen, Jonathan S. Steckel, Dorai Ramprasad
-
Patent number: 8404154Abstract: A semiconductor nanocrystal capable of emitting blue light upon excitation. Also disclosed are devices, populations of semiconductor nanocrystals, and compositions including a semiconductor nanocrystal capable of emitting blue light upon excitation. In one embodiment, a semiconductor nanocrystal capable of emitting blue light including a maximum peak emission at a wavelength not greater than about 470 nm with a photoluminescence quantum efficiency greater than about 65% upon excitation. In another embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting blue light with a photoluminescence quantum efficiency greater than about 65% upon excitation.Type: GrantFiled: May 21, 2009Date of Patent: March 26, 2013Assignee: QD Vision, Inc.Inventors: Craig Breen, Jonathan S. Steckel, Dorai Ramprasad
-
Publication number: 20130069018Abstract: A method for preparing semiconductor nanocrystals comprises reacting cation precursors and anion precursors in a reaction mixture including one or more acids, one or more phenol compounds, and a solvent to produce semiconductor nanocrystals having a predetermined composition. A method for forming a coating on at least a portion of a population of semiconductor nanocrystals is also disclosed. The method comprises forming a first mixture including a population of semiconductor nanocrystals, one or more amine compounds, and a first solvent; adding cation precursors and anion precursors to the first mixture at a temperature sufficient for growing a semiconductor material on at least a portion of an outer surface of at least a portion of the population of semiconductor nanocrystals; and initiating addition of one or more acids to the first mixture after addition of the cation and anion precursors is initiated. Semiconductor nanocrystals and populations thereof are also disclosed.Type: ApplicationFiled: August 10, 2012Publication date: March 21, 2013Inventors: ZHENGGUO ZHU, Jonathan S. Steckel, Craig Breen, Justin W. Kamplain, Inia Song, Chunming Wang
-
Patent number: 8377333Abstract: A semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light with an improved photoluminescence quantum efficiency. Also disclosed are populations of semiconductor nanocrystals, compositions and devices including a semiconductor nanocrystal capable of emitting light with an improved photoluminescence quantum efficiency. In one embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light upon excitation with a photoluminescence quantum efficiency greater than about 65%.Type: GrantFiled: May 21, 2009Date of Patent: February 19, 2013Assignee: QD Vision, Inc.Inventors: Dorai Ramprasad, Craig Breen, Jonathan S. Steckel
-
Publication number: 20130037778Abstract: A method of making a device comprises forming a layer comprising quantum dots over a substrate including a first electrode, fixing the layer comprising quantum dots formed over the substrate, and exposing at least a portion of, and preferably all, exposed surfaces of the fixed layer comprising quantum dots to small molecules. Also disclosed is a method of making a device, the method comprising forming a layer comprising quantum dots over a substrate including a first electrode, exposing the layer comprising quantum dots to small molecules and light flux. A method of making a film including a layer comprising quantum dots, and a method of preparing a device component including a layer comprising quantum dots are also disclosed. Devices, device components, and films are also disclosed.Type: ApplicationFiled: May 10, 2012Publication date: February 14, 2013Inventors: PETER T. KAZLAS, John Spencer Morris, Robert J. Nick, Zoran Popovic, Matthew Stevenson, Jonathan S. Steckel
-
Patent number: 8354785Abstract: A nanocrystal comprising a semiconductor material comprising one or more elements of Group IIIA of the Periodic Table of Elements and one or more elements of Group VA of the Periodic Table of Elements, wherein the nanocrystal is capable of emitting light having a photoluminescence quantum efficiency of at least about 30% upon excitation. Also disclosed is a nanocrystal including a core comprising a first semiconductor material comprising one or more elements of Group IIIA of the Periodic Table of Elements and one or more elements of Group VA of the Periodic Table of Elements, and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the nanocrystal is capable of emitting light having a photoluminescence quantum efficiency of at least about 30% upon excitation.Type: GrantFiled: May 21, 2009Date of Patent: January 15, 2013Assignee: QD Vision, Inc.Inventors: Christopher R. Clough, Craig Breen, Jonathan S. Steckel, Ebenezer Selwyn Arun Thambaw
-
Patent number: 8080437Abstract: A semiconductor nanocrystal includes a core including a first semiconductor material and an overcoating including a second semiconductor material. A monodisperse population of the nanocrystals emits blue light over a narrow range of wavelengths with a high quantum efficiency.Type: GrantFiled: June 27, 2007Date of Patent: December 20, 2011Assignee: Massachusetts Institute of TechnologyInventors: Jonathan S. Steckel, John P. Zimmer, Seth Coe-Sullivan, Nathan E. Stott, Vladimir Bulović, Moungi G. Bawendi
-
Publication number: 20110229998Abstract: A semiconductor nanocrystal includes a core including a first semiconductor material and an overcoating including a second semiconductor material. A monodisperse population of the nanocrystals emits blue light over a narrow range of wavelengths with a high quantum efficiency.Type: ApplicationFiled: June 27, 2007Publication date: September 22, 2011Inventors: Jonathan S. Steckel, John P. Zimmer, Seth Coe-Sullivan, Nathan E. Stott, Vladimir Bulovic, Moungi G. Bawendi
-
Publication number: 20100314646Abstract: The present inventions relate to optical components which include quantum confined semiconductor nanoparticles, wherein at least a portion of the nanoparticles include a ligand attached to a surface thereof, the ligand being represented by the formula: X-Sp-Z, wherein: X represents a primary amine group, a secondary amine group, a urea, a thiourea, an imidizole group, an amide group, an other nitrogen containing group, a carboxylic acid group, a phosphonic or arsonic acid group, a phosphinic or arsinic acid group, a phosphate or arsenate group, a phosphine or arsine oxide group; Sp represents a spacer group, such as a group capable of allowing a transfer of charge or an insulating group; and Z represents: (i) a reactive group capable of communicating specific chemical properties to the nanocrystal as well as provide specific chemical reactivity to the surface of the nanocrystal, and/or (ii) a group that is cyclic, halogenated, or polar a-protic.Type: ApplicationFiled: December 22, 2009Publication date: December 16, 2010Inventors: Craig Breen, John R. Linton, Jonathan S. Steckel, Marshall Cox, Seth Coe-Sullivan, Mark Comerford