Patents by Inventor Takayasu Sado

Takayasu Sado 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).

  • Patent number: 9748496
    Abstract: A specific nitrogen-containing heterocyclic compound having a urea structure, an electron transporting material containing the nitrogen-containing heterocyclic compound, and an organic electroluminescence device including a light emitting layer and an electron transporting layer between a cathode and an anode in which the electron transporting layer includes the electron transporting material or the nitrogen-containing heterocyclic derivative. An organic EL device exhibiting high emission efficiency even at low voltage and a material for organic EL devices are described.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: August 29, 2017
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado, Hiroki Ishida
  • Patent number: 9559311
    Abstract: An anthracene derivative is represented by a formula (1) below, in which at least one of Ar1, Ar2, Ar3, L1, L2 and L3 is a group derived from a skeleton represented by a formula (10) below,
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: January 31, 2017
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado
  • Publication number: 20160254459
    Abstract: An organic electroluminescence device that includes an anode, an emitting layer that includes a host and a fluorescent dopant, an electron transporting zone, a cathode, a blocking layer adjacent to the emitting layer in the electron transporting zone where the blocking layer includes an aromatic heterocyclic derivative with an azine ring and where the triplet energy ETb (eV) of the aromatic heterocyclic derivative is larger than a triplet energy ETh (eV) of the host.
    Type: Application
    Filed: March 18, 2016
    Publication date: September 1, 2016
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yuichiro KAWAMURA, Hiroyuki SAITO, Hitoshi KUMA, Masahiro KAWAMURA, Yukitoshi JINDE, Hirokatsu ITO, Takayasu SADO, Sayaka MIZUTANI
  • Publication number: 20160240795
    Abstract: Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.
    Type: Application
    Filed: April 27, 2016
    Publication date: August 18, 2016
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Tetsuya Inoue, Mitsunori Ito, Tomoki Kato, Kumiko Gorai, Kazuki Nishimura, Takayasu Sado
  • Publication number: 20160197289
    Abstract: An organic electroluminescence device includes: an anode; a cathode opposite the anode; and an organic layer interposed between the anode and the cathode, in which the organic layer includes: an emitting layer; and a first electron transporting layer and a second electron transporting layer which are provided on a side of the emitting layer near the cathode. The first electron transporting layer includes a compound represented by a formula (1) below, and the second electron transporting layer includes a compound represented by a formula (2) below.
    Type: Application
    Filed: October 8, 2013
    Publication date: July 7, 2016
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Takayasu SADO, Sayaka MIZUTANI
  • Patent number: 9373802
    Abstract: Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: June 21, 2016
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tetsuya Inoue, Mitsunori Ito, Tomoki Kato, Kumiko Gorai, Kazuki Nishimura, Takayasu Sado
  • Patent number: 9324950
    Abstract: An organic electroluminescence device that includes an anode, an emitting layer that includes a host and a fluorescent dopant, an electron transporting zone, a cathode, a blocking layer adjacent to the emitting layer in the electron transporting zone where the blocking layer includes an aromatic heterocyclic derivative with an azine ring and where the triplet energy ETb (eV) of the aromatic heterocyclic derivative is larger than a triplet energy ETh (eV) of the host.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: April 26, 2016
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yuichiro Kawamura, Hiroyuki Saito, Hitoshi Kuma, Masahiro Kawamura, Yukitoshi Jinde, Hirokatsu Ito, Takayasu Sado, Sayaka Mizutani
  • Publication number: 20160111655
    Abstract: An organic EL device includes an anode, an emitting layer, an electron transporting zone and a cathode in this sequence, in which the electron transporting zone contains an aromatic heterocyclic derivative represented by a formula (1) below. In the formula (1), X1 to X3 are a nitrogen atom or CR1, and A is represented by a formula (2) below. In the formula (2), L1 is s single bond or a linking group, and HAr is represented by a formula (3) below. In the formula (3), Y1 is an oxygen atom, a sulfur atom or the like, and one of X11 to X18 is a carbon atom bonded to L1 by a single bond and the rest of X11 to X18 are a nitrogen atom or CR13.
    Type: Application
    Filed: October 21, 2015
    Publication date: April 21, 2016
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka MIZUTANI, Takayasu Sado
  • Patent number: 9209406
    Abstract: An organic EL device includes an anode, an emitting layer, an electron transporting zone and a cathode in this sequence, in which the electron transporting zone contains an aromatic heterocyclic derivative represented by a formula (1) below. In the formula (1), X1 to X3 are a nitrogen atom or CR1, and A is represented by a formula (2) below. In the formula (2), L1 is s single bond or a linking group, and HAr is represented by a formula (3) below. In the formula (3), Y1 is an oxygen atom, a sulfur atom or the like, and one of X11 to X18 is a carbon atom bonded to L1 by a single bond and the rest of X11 to X18 are a nitrogen atom or CR13.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: December 8, 2015
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado
  • Patent number: 9196842
    Abstract: An organic electroluminescence device having a long lifetime and a higher emission efficiency and a specific aromatic amine derivative which provides such an organic electroluminescence device are provided. In the specific aromatic amine derivative, a dibenzofuranyl group or a dibenzothiophenyl group is bonded via a p-phenylene and a heteroaryl group is bonded via a m-phenylene. The organic electroluminescence device includes a cathode, an anode and an organic thin film layer including one or more layers which is disposed between the cathode and the anode. The organic thin film layer includes at least one light emitting layer and at least one layer of the organic thin film layer includes the aromatic amine derivative singly or in combination.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: November 24, 2015
    Assignees: IDEMITSU KOSAN CO., LTD., MITSUI CHEMICALS, INC.
    Inventors: Tomoki Kato, Takayasu Sado, Takahiro Fujiyama
  • Publication number: 20150287921
    Abstract: An organic EL device that has a high efficiency and a long service life, an electronic apparatus containing the organic EL device, and a compound capable of providing the organic EL device.
    Type: Application
    Filed: February 7, 2013
    Publication date: October 8, 2015
    Applicants: Idemitsu Kosan Co., Ltd., Mitsui Chemicals, Inc.
    Inventors: Tomoki Kato, Takayasu Sado, Takahiro Fujiyama
  • Publication number: 20150287931
    Abstract: An organic electroluminescence device having a long lifetime and a higher emission efficiency and a specific aromatic amine derivative which provides such an organic electroluminescence device are provided. In the specific aromatic amine derivative, a dibenzofuranyl group or a dibenzothiophenyl group is bonded via a p-phenylene and a heteroaryl group is bonded via a m-phenylene. The organic electroluminescence device includes a cathode, an anode and an organic thin film layer including one or more layers which is disposed between the cathode and the anode. The organic thin film layer includes at least one light emitting layer and at least one layer of the organic thin film layer includes the aromatic amine derivative singly or in combination.
    Type: Application
    Filed: June 20, 2013
    Publication date: October 8, 2015
    Applicants: IDEMITSU KOSAN CO., LTD., MITSUI CHEMICALS, INC.
    Inventors: Tomoki Kato, Takayasu Sado, Takahiro Fujiyama
  • Publication number: 20150263292
    Abstract: An aromatic amine derivative represented by formula (1): wherein HAr1, Ar2, L1, L2, and L3 are as defined in the specification, is useful as a material for constituting an organic EL device and realizes an organic EL device having a high efficiency and a long lifetime even when driving at a low voltage.
    Type: Application
    Filed: August 29, 2013
    Publication date: September 17, 2015
    Applicants: IDEMITSU KOSAN CO., LTD., MITSUI CHEMICALS, INC.
    Inventors: Tomoki Kato, Takayasu Sado, Takahiro Fujiyama
  • Publication number: 20150243891
    Abstract: An aromatic amine derivative represented by formula (1): wherein R1, R2, R3, L, AR1, Ar2, k, m, and n are the same as defined in the specification, is useful as a material for an organic EL device and realizes an organic EL device with a high efficiency and a long lifetime even when driving it at a low voltage.
    Type: Application
    Filed: August 29, 2013
    Publication date: August 27, 2015
    Applicants: IDEMITSU KOSAN CO., LTD., MITSUI CHEMICALS, INC.
    Inventors: Tomoki Kato, Takayasu Sado, Takahiro Fujiyama
  • Publication number: 20150228899
    Abstract: An organic electroluminescent device containing, between an anode and a cathode facing each other, a first hole transporting layer, an adjacent layer adjacent to an emitting layer, and an emitting layer, in this order from the side of the anode, wherein the first hole transporting layer contains a compound represented by the following formula (1), is provided as an organic EL device that is capable of being driven at a low voltage and has a prolonged life time and high efficiency. (In the formula, R1 to R4, L1, Ar1, Ar2, m, n, p and q are as defined in the specification.
    Type: Application
    Filed: August 29, 2013
    Publication date: August 13, 2015
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki Kato, Takayasu Sado
  • Patent number: 9082986
    Abstract: An organic electroluminescence device includes a first organic thin-film layer and a second organic thin-film layer between an anode and a cathode opposing the anode in this order from the anode side. The first organic thin-film layer includes a specific aromatic heterocyclic derivative A, and the second organic thin-film layer includes a specific aromatic heterocyclic derivative B. The aromatic heterocyclic derivative A and the aromatic heterocyclic derivative B are different from each other. The organic electroluminescence device is capable of driving at a low voltage and has a long lifetime.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: July 14, 2015
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki Kato, Nobuhiro Yabunouchi, Takayasu Sado
  • Patent number: 8883323
    Abstract: An organic electroluminescence device that includes an anode, an emitting layer that includes a host and a dopant, a blocking layer, an electron injecting layer, and a cathode where the blocking layer includes an aromatic heterocyclic derivative, the triplet energy ETb (eV) of the blocking layer is larger than a triplet energy ETh (eV) of the host, and the affinity Ab (eV) of the blocking layer and an affinity Ae (eV) of the electron injecting layer satisfy a relationship of Ae?Ab<0.2.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: November 11, 2014
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Yuichiro Kawamura, Hiroyuki Saito, Hitoshi Kuma, Masahiro Kawamura, Yukitoshi Jinde, Hirokatsu Ito, Takayasu Sado, Sayaka Mizutani
  • Publication number: 20140312331
    Abstract: Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.
    Type: Application
    Filed: June 30, 2014
    Publication date: October 23, 2014
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Tetsuya Inoue, Mitsunori Ito, Tomoki Kato, Kumiko Hibino, Kazuki Nishimura, Takayasu Sado
  • Publication number: 20140312338
    Abstract: An aromatic heterocyclic derivative is represented by a formula (1) below. In the formula (1), X1 to X3 each are a nitrogen atom or CR1, with a proviso that at least one of X1 to X3 is a nitrogen atom. A is represented by a formula (2) and B is represented by a formula (4) below.
    Type: Application
    Filed: November 21, 2012
    Publication date: October 23, 2014
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado
  • Publication number: 20140239273
    Abstract: An anthracene derivative is represented by a formula (1) below, in which at least one of Ar1, Ar2, Ar3, L1, L2 and L3 is a group derived from a skeleton represented by a formula (10) below,
    Type: Application
    Filed: December 18, 2013
    Publication date: August 28, 2014
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka MIZUTANI, Takayasu Sado