Patents Assigned to Evident Technologies
-
Patent number: 7850777Abstract: A semiconductor nanocrystal composition comprising a Group V to VI semiconductor material and a method of making same. The method includes synthesizing a semiconductor nanocrystal core, where the synthesizing includes dissolving a Group V to VI anion gas in a first solvent to produce a Group V to VI anion precursor, preparing a cation precursor, and reacting the Group V to VI anion precursor with the cation precursor in the presence of a second solvent. The reacting may occur in a high pressure vessel.Type: GrantFiled: February 28, 2007Date of Patent: December 14, 2010Assignee: Evident TechnologiesInventors: Adam Peng, Margaret Hines, Susanthri Perera
-
Publication number: 20100291724Abstract: Embodiments of the invention provide methods of forming photovoltaic or thermoelectric materials, including photovoltaic or thermoelectric films. In one embodiment, the invention provides a method of forming a photovoltaic material, the method comprising: depositing an inorganic capped nanoparticle solution onto a substrate; and heating the substrate.Type: ApplicationFiled: May 12, 2010Publication date: November 18, 2010Applicant: EVIDENT TECHNOLOGIESInventors: Daniel Landry, Susanthri Perera
-
Water based colorants comprising semiconductor nanocrystals and methods of making and using the same
Patent number: 7811470Abstract: A water based colorant that includes a polymer emulsion and semiconductor crystals capable of emitting light. The colorants include paints, inks and/or dyes can be applied to various substrates.Type: GrantFiled: October 4, 2007Date of Patent: October 12, 2010Assignee: Evident TechnologiesInventors: James Hayes, Luis Sanchez -
Patent number: 7804587Abstract: A system and method for distinguishing a first light source from other light sources utilizes an image receiver that can selectively engage and disengage a filter. The filter can be configured to either block bands of light corresponding to the light being emitted by either the first source or the other sources. By sequentially engaging and disengaging the filter from the image receiver, the first light source may be distinguished from other light sources.Type: GrantFiled: October 3, 2007Date of Patent: September 28, 2010Assignee: Evident Technologies, Inc.Inventors: Luis A. Sanchez, James Hayes, Clinton T. Ballinger, Eva Sbardella
-
Publication number: 20100226849Abstract: A method for producing a high yield of high quality, low size distribution, and size tunable semiconductor nanocrystals. The method produces III-V, II-VI, II-V, IV-VI, IV, ternary, quarternary, and quinary semiconductor nanocrystals (quantum dots) using a catalyst assisted two-phase reaction.Type: ApplicationFiled: February 26, 2010Publication date: September 9, 2010Applicant: EVIDENT TECHNOLOGIESInventor: Adam Peng
-
Patent number: 7785657Abstract: A first population of semiconductor nanocrystals to create electron transport conduits, a second population so semiconductor nanocrystals to create hole transport conduits; and a third population of semiconductor nanocrystals to be used for either light absorption or light emission can be combined to form an inorganic nanostructure layer.Type: GrantFiled: December 11, 2007Date of Patent: August 31, 2010Assignee: Evident Technologies, Inc.Inventors: Michael LoCascio, San Ming Yang
-
Patent number: 7777870Abstract: A system and method for distinguishing a first light source from other light sources utilizes an image receiver that can selectively engage and disengage a filter. The filter can be configured to block bands of light corresponding to the light being emitted by either the first source or the other sources. By alternately engaging and disengaging the filter from the image receiver, the first light source may be distinguished from other light sources.Type: GrantFiled: January 21, 2008Date of Patent: August 17, 2010Assignee: Evident Technologies, Inc.Inventors: James C. M. Hayes, Luis A. Sanchez, Eva Marie Sackal, Clinton T. Ballinger
-
Patent number: 7754329Abstract: A water-stable semiconductor nanocrystal complex and methods of making the same are provided. The water-stable semiconductor nanocrystal complex includes a semiconductor nanocrystal composition, a surfactant layer, and an outer layer. The outer layer and/or the surfactant layer can be cross-linked.Type: GrantFiled: March 8, 2007Date of Patent: July 13, 2010Assignee: Evident Technologies, Inc.Inventors: Wei Liu, Daniel Landry, Michael LoCascio
-
Patent number: 7723744Abstract: Light-emitting devices are provided that incorporate one or more underlying LED chips or other light sources and a layer having one or more populations of nanoparticles disposed over the light source. The nanoparticles may absorb some light emitted by the underlying source, and re-emit light at a different level. By varying the type and relative concentration of nanoparticles, different emission spectra may be achieved. White light and specialty-color emission may be achieved. Devices also may include multiple LED chips, with nanoparticles disposed over one or more underlying chips in an array.Type: GrantFiled: December 7, 2007Date of Patent: May 25, 2010Assignee: Evident Technologies, Inc.Inventors: Jennifer Gillies, David Socha, Kwang-Ohk Cheon, Michael LoCasio
-
Publication number: 20090246900Abstract: A shaped article comprising a plurality of semiconductor nanocrystals. Devices incorporating shaped articles are also provided. Methods of manufacturing shaped articles by various molding processes are also provided.Type: ApplicationFiled: January 8, 2009Publication date: October 1, 2009Applicant: EVIDENT TECHNOLOGIESInventor: Jennifer Gilles
-
Patent number: 7524746Abstract: A high-refractive index material that includes semiconductor nanocrystal compositions. The high-refractive index material has at least one semiconductor nanocrystal composition incorporated in a matrix material and has a refractive index greater than 1.5. The semiconductor nanocrystal composition has a semiconductor nanocrystal core of a II-VI, III-V, or IV-VI semiconductor material. A method of making a high-refractive index material includes incorporating, at least one semiconductor nanocrystal composition in a matrix material. An application of a high-refractive index material includes incorporating at least one semiconductor nanocrystal composition in a matrix material to form the high-refractive index material and depositing the high-refractive index material on the surface of a lighting device.Type: GrantFiled: March 8, 2007Date of Patent: April 28, 2009Assignee: Evident Technologies, Inc.Inventors: Michael Locascio, Jennifer Gillies, Margaret Hines
-
Patent number: 7482059Abstract: A semiconductor nanocrystal complex including a metal layer formed on the outer surface of a semiconductor nanocrystal core after synthesis of the semiconductor nanocrystal core and a method for preparing a nanocrystal complex comprising forming a metal layer on a semiconductor nanocrystal core after synthesis of the semiconductor nanocrystal core. The metal layer may passivate the surface of the semiconductor nanocrystal core and protect the semiconductor nanocrystal core from the effects of oxidation. Also provided is a semiconductor nanocrystal complex with a shell grown onto the metal layer formed on the semiconductor nanocrystal core. In this embodiment, the metal layer may prevent lattice mismatch between the semiconductor shell and the semiconductor nanocrystal core.Type: GrantFiled: May 10, 2005Date of Patent: January 27, 2009Assignee: Evident TechnologiesInventors: Adam Peng, Wei Liu
-
Publication number: 20080277626Abstract: The present invention relates to inks and more particularly, to fluorescent ink formulations including quantum dots for various printing processes such as inkjet, flexographic, screen printing, thermal transfer, and pens. The inks include one or more populations of fluorescent quantum dots dispersed in polymeric material, having fluorescence emissions between about 450 nm and about 2500 nm; and a liquid or solid vehicle. The vehicle is present in a ratio to achieve an ink viscosity, surface tension effective, drying time and other printing parameters used for printing processes.Type: ApplicationFiled: May 23, 2007Publication date: November 13, 2008Applicant: EVIDENT TECHNOLOGIES, INC.Inventors: San Ming YANG, Luis SANCHEZ, James HAYES
-
Publication number: 20080246017Abstract: Light-emitting devices are provided that incorporate one or more underlying LED chips or other light sources and a layer having one or more populations of nanoparticles disposed over the light source. The nanoparticles may absorb some light emitted by the underlying source, and re-emit light at a different level. By varying the type and relative concentration of nanoparticles, different emission spectra may be achieved. White light and specialty-color emission may be achieved. Devices also may include multiple LED chips, with nanoparticles disposed over one or more underlying chips in an array.Type: ApplicationFiled: December 7, 2007Publication date: October 9, 2008Applicant: EVIDENT TECHNOLOGIESInventors: Jennifer GILLIES, David Socha, Kwang Ohk CHEON, Michael Locasio
-
Publication number: 20080246388Abstract: A display device that includes an underlying excitation source, a converting layer, and an optical filter layer. The underlying excitation source emits light in a spatial pattern that may or may not be altered in time and has a short wavelength capable of being at least partially absorbed by the overlying converting layer. The converting layer can be a contiguous film or pixels of quantum dots that can be dispersed in a matrix material. This converting layer is capable of absorbing at least a portion of the wavelength(s) of the light from the underlying excitation source and emitting light at one or more different wavelengths. The optical filter layer prevents the residual light from the excitation source that was not absorbed by the converting layer from being emitted by the display device.Type: ApplicationFiled: March 13, 2008Publication date: October 9, 2008Applicant: EVIDENT TECHNOLOGIES, Inc.Inventors: Kwang-Ohk Cheon, Michael LoCascio, San Ming Yang
-
Publication number: 20080237546Abstract: A semiconductor nanocrystal composite comprising a semiconductor nanocrystal composition dispersed in an inorganic matrix material and a method of making same are provided. The method includes providing a semiconductor nanocrystal composition having a semiconductor nanocrystal core, providing a surfactant formed on the outer surface of the composition, and replacing the surfactant with an inorganic matrix material. The semiconductor nanocrystal composite emits light having wavelengths between about 1 and about 10 microns.Type: ApplicationFiled: September 4, 2007Publication date: October 2, 2008Applicant: Evident TechnologiesInventors: Michael LoCasio, Jennifer Gillies, Margaret Hines
-
Publication number: 20080230750Abstract: Powdered quantum dots that can be dispersed into a silicone layer are provided. The powdered quantum dots are a plurality of quantum dot particles, preferably on the micron or nanometer scale. The powdered quantum dots can include quantum dot-dielectric particle complexes or quantum dot-crosslinked silane complexes. The powdered quantum dots can included quantum dot particles coated with a dielectric layer.Type: ApplicationFiled: March 20, 2008Publication date: September 25, 2008Applicant: EVIDENT TECHNOLOGIES, INC.Inventors: Jennifer GILLIES, David SOCHA, Michael LOCASCIO
-
Publication number: 20080202383Abstract: A semiconductor nanocrystal composition that is stable and has high luminescent quantum yield. The semiconductor nanocrystal composition has a semiconductor nanocrystal core of a group II alloyed I-III-VI semiconductor nanocrystal material. A method of making a semiconductor nanocrystal composition is also provides which includes synthesizing a semiconductor nanocrystal core of a group II alloyed I-III-VI semiconductor material.Type: ApplicationFiled: February 27, 2007Publication date: August 28, 2008Applicant: EVIDENT TECHNOLOGIES, INC.Inventor: Weili SHI
-
Publication number: 20080191604Abstract: A method and system of retro-emission include a microlens array to focus light of a first wavelength on a layer of luminescent material configured to emit light of a second wavelength when excited by a light of the first wavelength.Type: ApplicationFiled: September 27, 2007Publication date: August 14, 2008Applicant: EVIDENT TECHNOLOGIESInventors: G. Michael Morris, Stephen Chakmakjian, Tasso R. M. Sales, Clinton T. Ballinger, Michael LoCascio
-
Publication number: 20080173886Abstract: Solid state lighting devices containing quantum dots dispersed in polymeric or silicone acrylates and deposited over a light source. Solid state lighting devices with different populations of quantum dots either dispersed in matrix materials or not are also provided. Also provided are solid state lighting devices with non-absorbing light scattering dielectric particles dispersed in a matrix material containing quantum dots and deposited over a light source. Methods of manufacturing solid state lighting devices containing quantum dots are also provided.Type: ApplicationFiled: May 11, 2007Publication date: July 24, 2008Applicant: EVIDENT TECHNOLOGIES, INC.Inventors: Kwang-Ohk CHEON, Jennifer GILLIES, David SOCHA, David DUNCAN, Michael LoCASIO