Patents Assigned to Princeton University
  • Patent number: 7968146
    Abstract: A method for forming a coating over a surface is disclosed. The method comprises depositing over a surface, a hybrid layer comprising a mixture of a polymeric material and a non-polymeric material. The hybrid layer may have a single phase or comprise multiple phases. The hybrid layer is formed by chemical vapor deposition using a single source of precursor material. The chemical vapor deposition process may be plasma-enhanced and may be performed using a reactant gas. The precursor material may be an organo-silicon compound, such as a siloxane. The hybrid layer may comprise various types of polymeric materials, such as silicone polymers, and various types of non-polymeric materials, such as silicon oxides. By varying the reaction conditions, the wt % ratio of polymeric material to non-polymeric material may be adjusted. The hybrid layer may have various characteristics suitable for use with organic light-emitting devices, such as optical transparency, impermeability, and/or flexibility.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: June 28, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Sigurd Wagner, Prashant Mandlik
  • Patent number: 7966327
    Abstract: A content-addressable and -searchable storage system for managing and exploring massive amounts of feature-rich data such as images, audio or scientific data, is shown. A segmentation and feature extraction unit segments data corresponding to an object into a plurality of data segments and -generates a feature vector for each data segment. A sketch construction component converts the feature vector into a compact bit-vector corresponding to the object. The system also has a similarity index having plurality of compact bit-vectors corresponding to a plurality of objects and an index insertion component for inserting a compact bit-vector corresponding to an object into the similarity index. The system may further have an indexing unit for identifying a candidate set of objects from said similarity index based upon a compact bit-vector corresponding to a query object.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: June 21, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Kai Li, Qin Lv, Moses Charikar
  • Patent number: 7964439
    Abstract: The invention provides a method of depositing a layer of a conductive material, e.g. metal, metal oxide or electroconductive polymer, from a patterned stamp, preferably a soft, elastomeric stamp, to a substrate after an organic layer has been transferred from a patterned stamp to an organic layer over the substrate. The patterned metal or organic layer may be used for example, in a wide range of electronic devices. The present methods are particularly suitable for nanoscale patterning of organic electronic components.
    Type: Grant
    Filed: November 3, 2004
    Date of Patent: June 21, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Changsoon Kim, Yifang Cao, Winston O. Soboyejo, Stephen Forrest
  • Patent number: 7955889
    Abstract: An optoelectronic device and a method for fabricating the optoelectronic device includes a first electrode disposed on a substrate, an exposed surface of the first electrode having a root mean square roughness of at least 30 nm and a height variation of at least 200 nm, the first electrode being transparent. A conformal layer of a first organic semiconductor material is deposited onto the first electrode by organic vapor phase deposition, the first organic semiconductor material being a small molecule material. A layer of a second organic semiconductor material is deposited over the conformal layer. At least some of the layer of the second organic semiconductor material directly contacts the conformal layer. A second electrode is deposited over the layer of the second organic semiconductor material. The first organic semiconductor material is of a donor-type or an acceptor-type relative to the second organic semiconductor material, which is of the other material type.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: June 7, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Fan Yang, Stephen R. Forrest
  • Patent number: 7951501
    Abstract: A fuel cell is provided, which includes a first plenum around an anode for receiving fuel, and a second plenum around a cathode for receiving oxygen. A fluid controller controls the supply of fuel to the first plenum or oxygen to the second plenum. A sensor detects the load on the fuel cell, and a controller controls the fluid controller in response to the load detected by the sensor. A method for controlling the output of a fuel cell is also provided, which includes the step of providing a fuel cell having a reaction area with an effective area where reactions may occur. The demand on the fuel cell is detected and the effective area of the reaction area is varied in response to the demand. Alternatively, the fuel cell may have an internal resistance, and the method may include varying the internal resistance in response to the demand.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: May 31, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Jay B Benziger, Claire H. Woo
  • Patent number: 7947897
    Abstract: A photosensitive device includes a series of organic photoactive layers disposed between two electrodes. Each layer in the series is in direct contact with a next layer in the series. The series is arranged to form at least one donor-acceptor heterojunction, and includes a first organic photoactive layer comprising a first host material serving as a donor, a thin second organic photoactive layer comprising a second host material disposed between the first and a third organic photoactive layer, and the third organic photoactive layer comprising a third host material serving as an acceptor. The first, second, and third host materials are different. The thin second layer serves as an acceptor relative to the first layer or as a donor relative to the third layer.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: May 24, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Barry P. Rand, Stephen R. Forrest
  • Publication number: 20110114897
    Abstract: Functionalized graphene sheets having a carbon to oxygen molar ratio of at least about 23:1 and method of preparing the same.
    Type: Application
    Filed: February 3, 2009
    Publication date: May 19, 2011
    Applicant: The Trustees of Princeton University
    Inventors: Ilhan A. Aksay, David L. Milius, Sibel Korkut, Robert K. Prud'Homme
  • Patent number: 7943419
    Abstract: An organic semiconductor device is provided. The device has a first electrode and a second electrode, with an organic semiconductor layer disposed between the first and second electrodes. An electrically conductive grid is disposed within the organic semiconductor layer, which has openings in which the organic semiconductor layer is present. At least one insulating layer is disposed adjacent to the electrically conductive grid, preferably such that the electrically conductive grid is completely separated from the organic semiconductor layer by the insulating layer. Methods of fabricating the device, and the electrically conductive grid in particular, are also provided. In one method, openings are formed in an electrically conductive layer with a patterned die, which is then removed. In another method, an electrically conductive layer and a first insulating layer are etched through the mask to expose portions of a first electrode.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: May 17, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Marc Baldo, Peter Peumans, Stephen Forrest, Changsoon Kim
  • Publication number: 20110110986
    Abstract: Polymer surfaces coated with organometallic layers, wherein the organometallic layers and polymer surfaces have functional groups that react to bond the organometallic layer to the polymer surface with organometallic functional groups remaining unreacted for the subsequent covalent attachment of organic overlayers. Coating methods and coated articles are also disclosed.
    Type: Application
    Filed: November 4, 2010
    Publication date: May 12, 2011
    Applicant: The Trustees of Princeton University
    Inventors: Jeffrey Schwartz, T. Joseph Dennes
  • Patent number: 7935754
    Abstract: An automotive body panel containing a polymer composite formed of at least one polymer and a modified graphite oxide material, which is a thermally exfoliated graphite oxide with a surface area of from about 300 m2/g to 2600 m2/g.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: May 3, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Robert K. Prud'Homme, Ilhan A. Aksay, Douglas Adamson, Ahmed Abdala
  • Patent number: 7931794
    Abstract: The present invention relates to a method and system for electrolytic fabrication of cells. A cell can be formed of a silicon layer (cathode) sandwiched between layers of glass. One or more holes are formed in the silicon layer. An alkali metal enriched glass material is placed in or associated with the one or more holes. Electrolysis is used to make the alkali metal ions in the alkali metal enriched glass material combine with electrons from the silicon cathode to form neutral alkali metal atoms in the one or more holes.
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: April 26, 2011
    Assignee: Princeton University
    Inventors: William Happer, Yuan-Yu Jau, Fei Gong, Katharine Estelle Jensen
  • Patent number: 7931943
    Abstract: Process for forming a coated article by (a) depositing a layer of an omega functionalized organophosphorous compound on an oxide substrate; (b) heating the substrate of step (a) to a temperature sufficient to bond the omega functionalized organophosphorous compound to the oxide substrate; (c) depositing a separate layer onto the layer produced by step (b); and (d) bonding the layers produced by steps (b) and (c) through the omega functional group.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: April 26, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Jeffrey Schwartz, Michael Danahy, Michael Avaltroni, Jing Guo
  • Publication number: 20110088621
    Abstract: Methods and systems for organic vapor jet deposition are provided, where an exhaust is disposed between adjacent nozzles. The exhaust may reduce pressure buildup in the nozzles and between the nozzles and the substrate, leading to improved deposition profiles, resolution, and improved nozzle-to-nozzle uniformity. The exhaust may be in fluid communication with an ambient vacuum, or may be directly connected to a vacuum source.
    Type: Application
    Filed: December 21, 2010
    Publication date: April 21, 2011
    Applicants: The Regents of the University of Michigan, The Trustees of Princeton University
    Inventors: Stephen Forrest, Richard Lunt
  • Publication number: 20110093082
    Abstract: The present invention provides a dense-coverage, adherent phosphorous-based coating on the native oxide surface of a material. Disclosed phosphorous-based coatings include phosphate and organo-phosphonate coatings. The present invention also provides further derivatization of the phosphorous-based coatings to yield dense surface coverage of chemically reactive coatings and osetoblast adhesion-promoting and proliferation-promoting coatings on the native oxide surface of a titanium material.
    Type: Application
    Filed: October 19, 2010
    Publication date: April 21, 2011
    Applicant: The Trustees of Princeton University
    Inventors: Jeffrey Schwartz, Michael J. Avaltroni, Kim S. Midwood, Jean E. Schwarzbauer, Ellen Gawalt
  • Patent number: 7929937
    Abstract: A system and method for blind estimation of carrier frequency offsets (CFOs) and separation of user signals in wireless communications systems are provided. Blind estimation of CFOs (i.e., without knowledge of the conditions of the transmitter or the transmission medium/channel) is carried out in order to improve reception quality by a wireless communications device. A received RF signal is over-sampled by a pre-defined over-sampling factor, and polyphase components are extracted from the over-sampled signal. The polyphase components are used to construct a virtual receiver output matrix, e.g., a model of the received signal and its associated output matrix. System response conditions are blindly estimated by applying a blind system estimation algorithm to the virtual receiver output matrix.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: April 19, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Visa Koivunen, Athina Petropulu, H. Vincent Poor, Yuanning Yu
  • Patent number: 7927714
    Abstract: A metallic article for high temperature applications such as a turbine engine component is protected by a thermal barrier coating system on the article's metallic substrate. The thermal barrier coating system includes a bond coat layer of aluminum containing alloy on the metal substrate, an alumina layer on the bond coat layer and a ceramic thermal barrier layer on the alumina layer. The bond coat layer is doped with elemental barium that enhances the creep resistance of the alumina layer, thus, minimizing spallation of the ceramic thermal barrier layer.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: April 19, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Emily A. Carter, Ivan Milas
  • Patent number: 7923041
    Abstract: Disclosed are compositions for promoting general health and well-being, comprising an extract of a botanical raw material, wherein said extract inhibits the carboxyl demethylating activity of a protein phosphatase, and methods of making and using same.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: April 12, 2011
    Assignees: Signum Biosciences, Inc., The Trustees of Princeton University
    Inventors: Jeffry Stock, Maxwell Stock, Haoming Gu, Zhu Li, Peter Wolanin
  • Patent number: 7915521
    Abstract: A device comprises a plurality of fence layers of a semiconductor material and a plurality of alternating layers of quantum dots of a second semiconductor material embedded between and in direct contact with a third semiconductor material disposed in a stack between a p-type and n-type semiconductor material. Each quantum dot of the second semiconductor material and the third semiconductor material form a heterojunction having a type II band alignment. A method for fabricating such a device is also provided.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: March 29, 2011
    Assignees: The Trustees of Princeton University, The Regents of the University of Michigan
    Inventors: Stephen R. Forrest, Guodan Wei, Kuen-Ting Shiu
  • Patent number: 7915701
    Abstract: A device is provided having a first electrode, a second electrode, a first photoactive region having a characteristic absorption wavelength ?1 and a second photoactive region having a characteristic absorption wavelength ?2. The photoactive regions are disposed between the first and second electrodes, and further positioned on the same side of a reflective layer, such that the first photoactive region is closer to the reflective layer than the second photoactive region. The materials comprising the photoactive regions may be selected such that ?1 is at least about 10% different from ?2. The device may further comprise an exciton blocking layer disposed adjacent to and in direct contact with the organic acceptor material of each photoactive region, wherein the LUMO of each exciton blocking layer other than that closest to the cathode is not more than about 0.3 eV greater than the LUMO of the acceptor material.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: March 29, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Stephen Forrest, Jiangeng Xue, Soichi Uchida, Barry P. Rand
  • Patent number: 7910825
    Abstract: A photosensitive device includes a series of organic photoactive layers disposed between two electrodes. Each layer in the series is in direct contact with a next layer in the series. The series is arranged to form at least one donor-acceptor heterojunction, and includes a first organic photoactive layer comprising a first host material serving as a donor, a thin second organic photoactive layer comprising a second host material disposed between the first and a third organic photoactive layer, and the third organic photoactive layer comprising a third host material serving as an acceptor. The first, second, and third host materials are different. The thin second layer serves as an acceptor relative to the first layer or as a donor relative to the third layer.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: March 22, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Barry P. Rand, Stephen R. Forrest