Patents Assigned to Cambridge Display Technology
  • Surface modification
    Patent number: 9112153
    Abstract: A method of modifying a fluorinated polymer surface comprising the steps of depositing a first layer on at least a portion of the fluorinated polymer surface, the first layer comprising a first polymer, the first polymer being a substantially perfluorinated aromatic polymer; and depositing a second layer on at least a portion of the first layer, the second layer comprising a second polymer, the second polymer being an aromatic polymer having a lower degree of fluorination than said first polymer, whereby the second layer provides a surface on to which a substance having a lower degree of fluorination than the first polymer, e.g. a non-fluorinated substance is depositable.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: August 18, 2015
    Assignee: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventor: Thomas Kugler
  • Organic light-emitting device
    Patent number: 9099666
    Abstract: An organic light-emitting device comprising an anode; a cathode; a first light-emitting layer between the anode and the cathode; and a second light-emitting layer between the first light-emitting layer and the cathode, wherein: the first light-emitting layer comprises a hole-transporting material and a first phosphorescent material, the second light-emitting layer comprises a second phosphorescent material; and the lowest triplet excited state energy level of the hole-transporting material is: (a) lower than the lowest triplet excited state of the second phosphorescent material, and (b) the same as or higher than the lowest triplet excited state energy level of the first phosphorescent material.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: August 4, 2015
    Assignees: Cambridge Display Technology, Ltd., Sumitomo Chemical Company Limited
    Inventors: Simon King, David Mohamad
  • Compound, Composition and Organic Light-Emitting Device
    Publication number: 20150214493
    Abstract: A compound of formula (I) wherein: Ar1 represents an aryl or heteroaryl group that may be unsubstituted or substituted with one or more substituents; n is 0 or 1; and Xan independently in each occurrence represents a group selected from formula (IIa) or (IIb): wherein X is O or S; R1 independently in each occurrence is H or a substituent; R2 independently in each occurrence is H or a substituent; p independently in each occurrence is 0, 1, 2, 3 or 4; q is 0, 1, 2 or 3; and * represents a bond to Ar1. Use of compounds of formula (I) as a host for phosphorescent emitters is disclosed.
    Type: Application
    Filed: January 22, 2015
    Publication date: July 30, 2015
    Applicants: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventor: Florence Bourcet
  • Method of fabricating an electronic device comprising allowing a self-assembled layer to form selectively
    Patent number: 9087999
    Abstract: A method of fabricating an electronic device, such as an organic thin film transistor, is disclosed. A substrate, for example a silicate glass substrate, has a surface which supports at least one metallic electrode comprising at least one metal, for example gold, and at least a portion of the surface of the substrate is exposed. The method comprises selectively forming a self-assembled layer on the exposed portion of the substrate surface such that no self-assembled layer is formed on the at least one metallic electrode and applying a solution or other liquid which is repelled by the self-assembled layer to at least one metal electrode so as to selectively form a layer of further material, such as a charge injection promoting material, on the at least one metallic electrode.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: July 21, 2015
    Assignee: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventor: Christopher Newsome
  • OPTICAL DEVICE COMPRISING A CHARGE TRANSPORT LAYER OF INSOLUBLE ORGANIC MATERIAL AND METHOD FOR THE PRODUCTION THEREOF
    Publication number: 20150188069
    Abstract: A method of forming an organic light emitting diode comprising the steps of: providing a substrate comprising a first electrode for injection of charge carriers of a first type; forming a charge transporting layer by depositing over the substrate a charge transporting material for transporting charge carriers of the first type, the charge transporting material being soluble in a solvent; treating the charge transporting layer to render it insoluble in the solvent; forming an electroluminescent layer by depositing onto the charge transporting layer a composition comprising the solvent, a phosphorescent material, and a host material; and depositing over the electroluminescent layer a second electrode for injection of charge carriers of a second type.
    Type: Application
    Filed: March 9, 2015
    Publication date: July 2, 2015
    Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventors: Nalinkumar Lallubhai Patel, Natasha M. Conway, Mark Leadbeater, Ilaria Grizzi
  • LIGHT-EMITTING COMPOUND
    Publication number: 20150162551
    Abstract: A phosphorescent compound of formula (I): wherein: M is a transition metal; L in each occurrence is independently a mono- or poly-dentate ligand; R8, R9, R10 and R11 are each independently H or a substituent; D1 and D2 are each independently a dendron; x is at least 1; y is 0 or a positive integer; z1 and z2 are each independently 0 or a positive integer; and n1 and n2 are each independently 0 or 1 with the proviso that at least one of n1 and n2 is 1. The compound may be a phosphorescent compound of an organic light-emitting device.
    Type: Application
    Filed: November 21, 2014
    Publication date: June 11, 2015
    Applicants: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventor: Annette Steudel
  • Surface planarisation
    Patent number: 9054042
    Abstract: This invention generally relates to planarisation of a surface of a substrate. In an embodiment of planarising a surface region of a substrate, the substrate having a body on a portion of said surface region, the method comprises: modifying the wetability of a surface of said body with respect to a liquid planariser composition by providing a surface modifying layer such as a self-assembled monolayer thereon; and then depositing the liquid planariser composition on said substrate and said body such that the planariser composition wets said surface region, wherein said surface modifying layer determines a contact angle of said liquid planariser composition to said surface of said body such that the deposited liquid planariser composition is repelled from said surface of said body.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: June 9, 2015
    Assignee: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventors: Arne Fleissner, Surama Malik, Colin Baker, Laurence Scullion, Jeremy Burroughes
  • Process for controlling the acceptor strength of solution-processed transition metal oxides for OLED applications
    Patent number: 9054328
    Abstract: The present invention provides a process for the adjustment of the electron acceptor strength of a transition metal oxide (TMO) to the HOMO of a semiconducting hole transport layer material (HTL material) in a device comprising an anode, a layer of said TMO deposited on said anode and a layer of said HTL material deposited on said TMO layer, comprising: depositing a solution comprising a precursor for said TMO on said anode, wherein the precursor solution has a pH selected so that the acceptor strength of the TMO for which the solution is a precursor is adjusted to the HOMO of said HTL material; drying the deposited solution to form a solid layer precursor layer; depositing a solution of said HTL material onto said solid layer precursor layer; and annealing thermally the resulting product to give the desired device having TMO at the interface between said anode and said HTL.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: June 9, 2015
    Assignee: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventors: Thomas Kugler, Richard J. Wilson
  • Compositions and methods for manufacturing light-emissive devices
    Patent number: 9028715
    Abstract: A composition adapted for use in the manufacture of an organic light-emissive device by passing the composition through one or more openings under pressure to deposit the composition, the composition comprising: a semi-conductive organic host material; a luminescent metal complex; and a first solvent, wherein the first solvent has a structure: where X, X? independently comprise O, S or N and R, R? independently comprise an aromatic or aliphatic group.
    Type: Grant
    Filed: July 20, 2009
    Date of Patent: May 12, 2015
    Assignee: Cambridge Display Technology Limited
    Inventors: Simon Goddard, Paul Wallace
  • POLYMER COMPOUND AND LIGHT EMITTING ELEMENT USING SAME
    Publication number: 20150115204
    Abstract: A polymer compound is provided having constitutional units of formula (1) and formula (2), and a constitutional unit of formula (3) and/or (4?): wherein Ar1 to Ar4, Ar20, Ar30? and Ar40 represent arylene groups or the like; Ar5 to Ar7 represent aryl groups or the like; Ar8 represents (2+p)-valent aromatic hydrocarbon group or the like; Ar10 represents (2+n)-valent aromatic hydrocarbon group or the like; R1 represents alkyl group or the like; La, Lb, Lg and Lh represent alkylene groups or the like; LA and LD represent oxygen atoms or the like; Q1 represents monovalent crosslinkable group; Q2? to Q4? represent monovalent crosslinkable groups or the like; x, y, c, nA and nD represent 0 or 1; p represents integer of 1 or greater.; na and ng represent integer of 0 to 3; nb and nh represent integer of 0 to 12; and n represents integer of 1 to 4.
    Type: Application
    Filed: March 26, 2013
    Publication date: April 30, 2015
    Applicants: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED, SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Chizu Sekine, Satoshi Mikami, Makoto Anryu, Hidenobu Kakimoto, Annette Regine Steudel, Martin John Humphries, Kiran Timothy Kamtekar, Elena Hojas Garcia, Sophie Heidenhain, Ruth Pegington
  • Electronic device
    Patent number: 9006715
    Abstract: A method of making an electronic device comprising a double bank well-defining structure, which method comprises: providing an electronic substrate; depositing a first insulating material on the substrate to form a first insulating layer; depositing a second insulating material on the first insulating layer to form a second insulating layer; removing a portion of the second insulating layer to expose a portion of the first insulating layer and form a second well-defining bank; depositing a resist on the second insulating layer and on a portion of the exposed first insulating layer; removing the portion of the first insulating layer not covered by the resist, to expose a portion of the electronic substrate and form a first well-defining bank within the second well-defining bank; and removing the resist. The method can provide devices with reduced leakage currents.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: April 14, 2015
    Assignee: Cambridge Display Technology Limited
    Inventors: Mark Crankshaw, Mark Dowling, Daniel Forsythe, Simon Goddard, Gary Williams, Ilaria Grizzi, Angela McConnell
  • Organic light emissive device comprising a trilayer cathode including a layer comprising sodium fluoride
    Patent number: 8981365
    Abstract: A method of manufacturing an organic light emissive device comprising: depositing an organic light emissive layer over an anode and depositing a cathode over the organic light emissive layer, wherein the cathode comprises a trilayer structure formed by: depositing a first layer comprising an electron injecting material; depositing a second layer over the first layer, the second layer comprising a metallic material having a workfunction greater than 3.5 eV; and depositing a third layer over the second layer, the third layer comprising a metallic material having a workfunction greater than 3.5 eV.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: March 17, 2015
    Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Co., Ltd.
    Inventors: Daniel Alan Forsythe, Simon King, Matthew Roberts
  • Organic light-emitting polymer and device
    Patent number: 8981354
    Abstract: Light-emitting and/or charge transporting polymers, methods of making the same, and organic light emitting devices comprising such polymers, the polymers comprising a repeat unit of formula (I): —(Ar)q-Sp-CT-Sp-(Ar)q—??(I) in which CT represents a conjugated charge-transporting group, each Ar independently represents an optionally substituted aryl or heteroaryl group, q is at least 1, and each Sp independently represents a spacer group forming a break in conjugation between Ar and CT.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: March 17, 2015
    Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Annette Steudel, Richard Owoare
  • Optical device comprising a charge transport layer of insoluble organic material and method for the production thereof
    Patent number: 8974917
    Abstract: A method of forming an organic light emitting diode comprising the steps of: providing a substrate comprising a first electrode for injection of charge carriers of a first type; forming a charge transporting layer by depositing over the substrate a charge transporting material for transporting charge carriers of the first type, the charge transporting material being soluble in a solvent; treating the charge transporting layer to render it insoluble in the solvent; forming an electroluminescent layer by depositing onto the charge transporting layer a composition comprising the solvent, a phosphorescent material, and a host material; and depositing over the electroluminescent layer a second electrode for injection of charge carriers of a second type.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: March 10, 2015
    Assignee: Cambridge Display Technology Limited
    Inventors: Nalinkumar L. Patel, Natasha M. Conway, Mark Leadbeater, Ilaria Grizzi
  • Lighting Tiles
    Publication number: 20150048350
    Abstract: We describe a lighting tile having a substrate bearing an electrode structure, the electrode structure comprising: a plurality of electrically conductive tracks disposed over said substrate; and an electrical connection region connecting to said plurality of tracks; wherein the height of said tracks tapers away from said connection region to compensate for a reduction in luminance from said lighting tile array from the electrical connection region which arises from a non-uniform voltage drop which appears along the tracks in use. Advantageously the tracks are fabricated by electroplating: then, as the rate of deposition is determined by the voltage drop along a track during plating, the height of the deposited tracks, and therefore their resistance, will match the profile required in operation to compensate for the reduction in luminance which would otherwise occur.
    Type: Application
    Filed: August 18, 2014
    Publication date: February 19, 2015
    Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventors: Colin Baker, Aleksandra Rankov
  • OPTOELECTRONIC DEVICE
    Publication number: 20150041787
    Abstract: This invention generally relates to an optoelectronic device and a method of fabricating such a device, and more particularly to an optoelectronic device comprising an anode layer, a semiconductive layer provided over the anode layer, and a cathode layer provided over the semiconductive layer, the anode layer comprising a plurality of electrically conductive tracks connected together and spaced apart from one another with gaps therebetween, the device further comprising a first and one or more further hole injection layers provided between the anode layer and the semiconductive layer and extending across said gaps, wherein the first hole injection layer has a conductivity greater than the conductivity of the one or more further hole injection layers.
    Type: Application
    Filed: March 13, 2013
    Publication date: February 12, 2015
    Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventors: Surama Malik, Julian Carter, Laurence Scullion, Colin Baker, Arne Fleissner, Jeremy Burroughes
  • Conductive polymer compositions in opto-electrical devices
    Patent number: 8945432
    Abstract: A conductive polymer composition comprising a conductive polymer in a solid polyelectrolyte.
    Type: Grant
    Filed: December 23, 2005
    Date of Patent: February 3, 2015
    Assignees: Cambridge Display Technology Limited, CDT Oxford Limited
    Inventors: Andrew Bruce Holmes, Mary J. McKiernan, Caroline Towns
  • Method of making an organic thin film transistor
    Patent number: 8946685
    Abstract: A method of forming an organic thin film transistor the method comprising: seeding a surface outside a channel region with one or more crystallization sites prior to deposition of the organic semiconductor; depositing a solution of the organic semiconductor onto the seeded surface and over the channel region whereby the organic semiconductor begins forming a crystal domain at the or each of the crystallization sites, the or each crystal domain growing from its crystallization site across the channel region in a direction determined by an advancing surface evaporation front; and applying energy to control the direction and rate of movement of the surface evaporation front thereby controlling the direction and rate of growth of the or each crystal domain across the channel region from the one or more crystallization sites outside the channel region.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: February 3, 2015
    Assignee: Cambridge Display Technology Limited
    Inventor: Thomas Kugler
  • Organic semiconductors
    Patent number: 8946448
    Abstract: A semiconducting compound with the structure: where X1 and X2 are independently S, Se, SiR1R2, O, CR3R4, C2R5R6, N, NR7, where R1 to R7 independently comprise hydrogen, straight, branched or cyclic alkyl, akenyl or alkynyl groups, alkoxy, aryl, silyl or amino; where each of Ar1 to Ar4 is optional and independently comprises, if present, an aryl or heteroaryl group; and where Y1 to Y4 independently comprise hydrogen, reactive groups, optionally substituted straight, branched or cyclic alkyl, alkoxy, akenyl, alkynyl, amido or amino groups, optionally substituted aryl or heteroaryl where at least one of Y1 to Y4 does not comprise hydrogen; and methods and devices related thereto.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: February 3, 2015
    Assignee: Cambridge Display Technology Limited
    Inventors: Sheena Zuberi, Tania Zuberi
  • Multiple wavelength light emitting device, electronic apparatus, and interference mirror
    Patent number: RE45442
    Abstract: A multiple wavelength light emitting device is provided wherewith the resonance strength and directivity between colors can be easily adjusted for balance. This light emitting device comprises a light emission means 4 for emitting light containing wavelength components to be output, and a semi-reflecting layer group 2 wherein semi-reflecting layers 2R, 2G, and 2B that transmit some light having specific wavelengths emitted from the light emission means and reflect the remainder are stacked up in order in the direction of light advance in association with wavelengths of light to be output. Light emission regions AR, AG, and AB are determined in association with the wavelengths of light to be output.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: March 31, 2015
    Assignees: Seiko Epson Corporation, Cambridge Display Technology Limited
    Inventors: Tatsuya Shimoda, Tomoko Koyama, Takeo Kaneko, Jeremy Henley Burroughes