Patents Assigned to Cambridge Display Technology
  • LIGHT-EMITTING COMPOUND
    Publication number: 20180138426
    Abstract: A phosphorescent compound of formula (I): wherein M is a transition metal; L is a ligand; R1 is a branched C3-20 alkyl group, a cyclic C5-20 alkyl group or group of formula (II): wherein each R5 is a C1-10, alkyl group; each R6 is a substituent; z is 0 or a positive integer; R2 is a C1-10 alkyl group; R3 is a C1-10 alkyl group or a group of formula —(Ar1)p wherein Ar1 is aryl or heteroaryl group and p is at least 1; each R4 is independently a substituent; v is at least 1; w is 0 or a positive integer; x is at least 1; and y is 0 or a positive integer. The compound may be used as a blue light-emitting material in an organic light-emitting device.
    Type: Application
    Filed: May 13, 2016
    Publication date: May 17, 2018
    Applicants: Cambridge Display Technology Limited
    Inventors: William Tarran, Kiran Kamtekar
  • PHOSPHORESCENT INK
    Publication number: 20180127604
    Abstract: A phosphorescent ink comprises a first solvent, a stabiliser and a first phosphorescent metal complex wherein the first phosphorescent metal complex comprises at least one aryl-imidazole or heteroaryl-imidazole ligand that may be unsubstituted or substituted with one or more substituents and wherein the solvent is selected from: linear, branched or cyclic ethers comprising one or more O—CH2 units; solvents comprising a CH2—C(R6)H—CH2 unit wherein R6 is an organic residue and the two CH2 groups may be linked by a divalent group: bicyclic, partially or fully saturated solvents; solvents of formula R8—CR7?CR7—CH2—R8 wherein each R7 is independently H or C1-10 alkyl and R8 in each occurrence is independently an organic residue; and solvents comprising a benzyl group. The stabiliser may be an antioxidant. The ink may be used to form an organic light-emitting device.
    Type: Application
    Filed: February 19, 2016
    Publication date: May 10, 2018
    Applicant: Cambridge Display Technology Limited
    Inventors: Simon Goddard, Gonçalo Pedro Gonçalves, Nazrul Islam
  • Polymers and organic electronic device
    Patent number: 9963550
    Abstract: A polymer comprising repeat units of formula (I) and repeat units of formula (II): wherein: Ar1 and Ar2 independently in each occurrence represents an aryl or heteroaryl group that may be unsubstituted or substituted with one or more substituents; Ar3 represents a fused aromatic or heteroaromatic group that may be unsubstituted or substituted with one or more substituents; R is a substituent; m is 0, 1 or 2 with the proviso that Ar2 is not phenanthrene if m is 1; each R9 is independently a substituent, and the two groups R9 may be linked to form a ring; each z is independently 0, 1 or 2; and each R10 is independently a substituent. The polymer may be used in an organic light-emitting device.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: May 8, 2018
    Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Kiran Kamtekar, Annette Steudel, Martin Humphries
  • Polymer and device
    Patent number: 9966534
    Abstract: A copolymer comprising a repeat unit of Formula (I) and at least one further repeat unit: Formula (I) wherein: wherein: Ar1 and Ar2 are each independently selected from aryl and heteroaryl, each of which is independently unsubstituted or substituted with one or more substituents; each R is independently a substituent; each n is independently 0, 1 or 2; each m is independently 0, 1, 2 or 3, and at least one of the repeat units of the polymer is a partially conjugating repeat unit.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: May 8, 2018
    Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Philip Stackhouse, Sophie Barbara Heidenhain, Ruth Pegington, Jonathan Pillow, Martin Humphries, Tomoyasu Yoshida
  • Method of doping an organic semiconductor and doping composition
    Patent number: 9960352
    Abstract: A method of forming a n-doped semiconductor layer wherein a film comprising an organic semiconductor and an n-dopant reagent is irradiated by light having a wavelength that is within an absorption range of the organic semiconductor, and wherein an absorption maximum wavelength of the n-dopant precursor is shorter than any peak wavelength of the light. The n-doped semiconductor layer may be an electron-injection layer of an organic light-emitting device.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: May 1, 2018
    Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Corporation Limited
    Inventors: Thomas Kugler, Sheena Zuberi
  • POLYMER COMPRISING AN UNSYMMETRIC DIARYLAMINOFLUOREN UNIT
    Publication number: 20180097183
    Abstract: A polymer comprising one or more optionally substituted repeat units of formula (I): wherein each Ar1 independently represents a substituted or unsubstituted aromatic or heteroaromatic group; each Ar2 independently represents a substituted or unsubstituted aromatic or heteroaromatic group; n and m in each occurrence is at least 1; and R1 and R2 are substituents wherein R1 and R2 are different.
    Type: Application
    Filed: November 21, 2017
    Publication date: April 5, 2018
    Applicants: Sumimoto Chemical Company Limited, Cambridge Display Technology Limited
    Inventors: Ruth Pegington, Sophie Barbara Heidenhain, Mary J. McKiernan
  • ORGANIC LIGHT EMITTING DEVICE
    Publication number: 20180078554
    Abstract: An OLED comprising a hole-transporting layer and light-emitting layer wherein the hole-transporting layer comprises a hole-transporting polymer wherein no more than 5% of the polystyrene equivalent polymer weight measured by gel permeation chromatography consists of chains with weight of less than 50,000.
    Type: Application
    Filed: November 21, 2017
    Publication date: March 22, 2018
    Applicants: Sumitomo Chemical Company Limited, Cambridge Display Technology Limited
    Inventors: Ruth Pegington, Martin Humphries
  • IMPROVED CHARGE STORAGE DEVICE AND SYSTEM
    Publication number: 20180083332
    Abstract: A charge storage device and system comprises an anode assembly and a cathode assembly, each of the assemblies comprising a charge storage layer of a conjugated polymer material, wherein the conjugated polymer material of the charge storage layer of the cathode assembly is air stable and non-ionic in its discharged state, and wherein the conjugated polymer material of the charge storage layer of the anode assembly includes is air stable and non-ionic in its discharged state. The polymer materials are fully conjugated along the main chain, and are made by processes that do not involve oxidative or electrochemical polymerisation. The charge storage layers are formed from solutions of these polymers, and are amorphous and continuous.
    Type: Application
    Filed: March 21, 2016
    Publication date: March 22, 2018
    Applicant: Cambridge Display Technology Limited
    Inventor: Jonathan Pillow
  • COMPOUND, COMPOSITION AND ORGANIC LIGHT-EMITTING DEVICE
    Publication number: 20180062089
    Abstract: Compound, Composition and Organic Light-Emitting Device A compound of formula (I) (Formula (I)) wherein X is O, S, NR8, CR82 or SiR82 wherein R8 in each occurrence is independently a substituent; R1, R5 and R6 are independently in each occurrence a substituent; x independently in each occurrence is 0, 1, 2, 3 or 4; and y independently in each occurrence is 0, 1 or 2. The compound may be provided as a sidechain, end group or backbone group of a polymer. The compound may be used as a host for a phosphorescent light-emitting material in an organic light-emitting device.
    Type: Application
    Filed: February 16, 2016
    Publication date: March 1, 2018
    Applicants: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventor: Kiran KAMTEKAR
  • Solution for a semiconducting layer of an organic electronic device
    Patent number: 9905783
    Abstract: Provided is a solution comprising a polymer and an organic semiconductor compound, wherein the semiconductor compound is a thiophene derivative, and wherein the solvent is a mixture comprising a) at least one of 4-methyl anisole, indane and an alkylbenzene with a linear or branched alkyl group containing from 4 to 7 carbon atoms; and b) at least one of tetrahydronaphthalin and 1,2,4-trimethylbenzene.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: February 27, 2018
    Assignee: Cambridge Display Technology Limited
    Inventors: Christopher Newsome, Daniel Tobjork
  • POLYMER BLENDS FOR A SEMICONDUCTING LAYER OF AN ORGANIC ELECTRONIC DEVICE
    Publication number: 20180053897
    Abstract: Provided is a polymer blend for a semiconducting layer of an organic electronic device, comprising: a first polymer; a second polymer which is different from the first polymer; and a semiconductor compound selected from the group of pentacene derivatives and thiophene derivatives. The semiconductor compound is distributed homogeneously in the semiconducting layer in the direction parallel to the surface of the electrodes. This improved lateral distribution of the semiconductor compound in the semiconducting layer provides a reduced contact resistance, particularly for short channel length devices.
    Type: Application
    Filed: March 1, 2016
    Publication date: February 22, 2018
    Applicants: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Christopher Newsome, Shuji Doi
  • ORGANIC LIGHT EMITTING POLYMER COMPRISING LIGHT-EMITTING REPEAT UNIT IN BACKBONE OF POLYMER AND DEVICE THEREWITH
    Publication number: 20180037812
    Abstract: A light-emitting polymer comprising a light-emitting repeat unit in a backbone of the polymer, wherein the polymer has an anisotropy of no more than 0.8 and wherein a transition dipole moment of the light-emitting repeat unit is aligned with the polymer backbone.
    Type: Application
    Filed: February 18, 2016
    Publication date: February 8, 2018
    Applicants: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Ruth Pegington, Michael Cass, David Mohamad, Matthew Roberts, William Tarran, Martin Humphries
  • Polymer and organic light-emitting device
    Patent number: 9873831
    Abstract: A co-polymer comprising a repeat unit of formula (I): wherein Ar1, Ar2 and Ar3 each independently represent an aryl or heteroaryl group that may be unsubstituted or substituted with one or more substituents, the copolymer further comprising a conjugation-breaking repeat unit that does not provide any conjugation path between repeat units adjacent to the conjugation-breaking repeat unit. The copolymer may be used as a host material of a phosphorescent material in a light-emitting layer of an organic light-emitting device.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: January 23, 2018
    Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Annette Steudel, Kiran Kamtekar
  • POLYMER AND ORGANIC LIGHT EMITTING DEVICE
    Publication number: 20180019400
    Abstract: A polymer comprising a repeat unit of formula (I): wherein R1 in each occurrence is independently H or a substituent; R2 in each occurrence is independently a substituent; and x is 0, 1, 2 or 3. The polymer may be used as a light-emitting polymer in an organic light-emitting device.
    Type: Application
    Filed: October 20, 2015
    Publication date: January 18, 2018
    Applicants: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Jonathan Pillow, Martin Humphries
  • Organic light emitting device
    Patent number: 9859498
    Abstract: An OLED comprising a hole-transporting layer and light-emitting layer wherein the hole-transporting layer comprises a hole-transporting polymer wherein no more than 5% of the polystyrene equivalent polymer weight measured by gel permeation chromatography consists of chains with weight of less than 50,000.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: January 2, 2018
    Assignees: Sumitomo Chemical Company Limited, Cambridge Display Technology Limited
    Inventors: Ruth Pegington, Martin Humphries
  • Polymer comprising an unsymmetric diarylaminofluorene unit
    Patent number: 9859499
    Abstract: A polymer comprising one or more optionally substituted repeat units of formula (I): (I) wherein each Ar1 independently represents a substituted or unsubstituted aromatic or heteroaromatic group; each Ar2 independently represents a substituted or unsubstituted aromatic or heteroaromatic group; n and m in each occurrence is at least 1; and R1 and R2 are substituents wherein R1 and R2 are different.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: January 2, 2018
    Assignees: Sumitomo Chemical Company Limited, Cambridge Display Technology Limited
    Inventors: Ruth Pegington, Sophie Barbara Heidenhain, Mary J. McKiernan
  • ORGANIC LIGHT-EMITTING DEVICE
    Publication number: 20170365805
    Abstract: Organic Light-Emitting Device An organic light-emitting device (100) comprising an anode (103); a cathode (109); a light-emitting layer (107) between the anode and the cathode; and a hole-transporting layer (105) between the anode and the cathode, wherein the light-emitting layer comprises a light-emitting compound of formula (I) and the hole-transporting layer comprises a hole-transporting material having a HOMO level that is no more than 5.1 e V from vacuum level: N N ML x R 2 (R) m (R) n y (I) wherein: R in each occurrence is independently a substituent; R 2 is H or a substituent; m is 0, 1 or 2; n is 0, 1, 2, 3 or 4; M is a transition metal; L is a ligand; y is at least 1; and x is 0 or a positive integer.
    Type: Application
    Filed: December 1, 2015
    Publication date: December 21, 2017
    Applicants: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Simon King, David Mohamad
  • Composition containing dopant and co-polymers having non-conjugated spacer units and its use in OLED devices
    Patent number: 9812644
    Abstract: A polymer comprising repeat units of formula (I) and one or more co-repeat units: Ar1 in each occurrence independently represent an aryl or heteroaryl group; R1 and R2 in each occurrence independently represent a substituent; p independently in each occurrence is 0 or a positive integer; Sp represents a spacer group comprising at least one carbon or silicon atom spacing the two groups Ar1 apart; and each group Ar1 is bound to an aromatic group of a co-repeat unit. The polymer may form a charge-transporting layer of an OLED or may be a host material used with a luminescent dopant in a light-emitting layer of an OLED.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: November 7, 2017
    Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Kiran Kamtekar, Annette Steudel
  • Organic light-emitting device and method
    Patent number: 9812647
    Abstract: Composition which may be useful in an organic light emitting diode, the composition having a fluorescent light-emitting polymer with light-emitting repeat units, and a triplet-accepting unit mixed with the light-emitting polymer.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: November 7, 2017
    Assignees: Cambridge Display Technology, Ltd., Sumitomo Chemical Company Limited
    Inventors: Jonathan Pillow, Matthew Roberts, Martina Pintani, Simon King, Michael Cass
  • POLYMER AND ORGANIC LIGHT-EMITTING DEVICE
    Publication number: 20170309837
    Abstract: A composition comprising a phosphorescent compound of formula (I) and a polymer comprising a repeat unit of formula (II) Ar1 is an aryl or heteroaryl group. R2 is a substituent. A is independently in each occurrence N or CR3 wherein R3 is H or a substituent. M is a transition metal or metal ion. x is a positive integer of at least 1. y is 0 or a positive integer. L1 is a mono- or polydentate ligand. R1 is a substituent. z is 0 or a positive integer. X is O or S. The phosphorescent compound of formula (I) may be mixed with the polymer or may be covalently bound thereto. The composition may be used in the light-emitting layer of an organic light-emitting device.
    Type: Application
    Filed: November 28, 2014
    Publication date: October 26, 2017
    Applicants: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Florence Bourcet, Annette Steudel, Richard J Wilson