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: 8803134
    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: February 6, 2012
    Date of Patent: August 12, 2014
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Tetsuya Inoue, Mitsunori Ito, Tomoki Kato, Kumiko Hibino, Kazuki Nishimura, Takayasu Sado
  • Publication number: 20140217393
    Abstract: An organic electroluminescence device including an anode and a cathode being opposed, wherein a first organic thin film layer and a second organic thin film layer are provided between the anode and the cathode sequentially from the anode side; the first organic thin film layer including an aromatic heterocyclic derivative A represented by the following formula (1-1) and a phosphorescent emitting material; and the second organic thin film layer including an aromatic heterocyclic derivative B represented by the following formula (2-1):
    Type: Application
    Filed: September 6, 2012
    Publication date: August 7, 2014
    Inventors: Tomoki Kato, Nobuhiro Yabunouchi, Takayasu Sado
  • Patent number: 8778510
    Abstract: A pyrromethene-boron complex compound represented by the following formula (1); wherein Z1 and Z2 are independently a hydrogen atom, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group or a substituted or unsubstituted aryloxy group, at least one of Z1 and Z2 is an alkoxy group substituted with a fluorine atom or an aryloxy group substituted with a fluorine atom or a fluoroalkyl group, and Z1 and Z2 may form a ring.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: July 15, 2014
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Fumio Okuda, Kiyoshi Ikeda, Takayasu Sado, Takahiko Ochi, Yoshimitsu Tanabe, Bunji Sawano
  • Publication number: 20140167003
    Abstract: Problem to Be Solved: To provide a highly efficient, long lifetime organic EL device that is capable of driving at low voltage.
    Type: Application
    Filed: August 27, 2013
    Publication date: June 19, 2014
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Tomoki KATO, Takayasu Sado
  • Publication number: 20140110692
    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: Application
    Filed: May 23, 2012
    Publication date: April 24, 2014
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki Kato, Nobuhiro Yabunouchi, Takayasu Sado
  • Publication number: 20140084270
    Abstract: An organic electroluminescence device includes an anode, a cathode, a first organic layer and an emitting layer including a luminescent material, in which the first organic layer and the emitting layer are interposed between the anode and the cathode in this sequence from the anode. The emitting layer contains a first material represented by the following formula (1-1) and a second material. The first organic layer contains a compound represented by the following formula (4).
    Type: Application
    Filed: August 15, 2013
    Publication date: March 27, 2014
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki KATO, Takayasu SADO
  • Publication number: 20140077191
    Abstract: A compound is represented by a formula (1) below. In the formula (1), X1 to X8 each independently represent a carbon atom to be bonded to a group represented by the following formula (20), CRX or a nitrogen atom. At least one of X1 to X8 is a carbon atom to be bonded to the group represented by the following formula (2). RX is each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, or the like.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 20, 2014
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado
  • Publication number: 20140073784
    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: November 21, 2012
    Publication date: March 13, 2014
    Inventors: Sayaka Mizutani, Takayasu Sado
  • Publication number: 20140001456
    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: August 12, 2013
    Publication date: January 2, 2014
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Sayaka MIZUTANI, Takayasu SADO
  • Publication number: 20130306955
    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: Application
    Filed: February 1, 2012
    Publication date: November 21, 2013
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado, Hiroki Ishida
  • Patent number: 8586199
    Abstract: Provided is an organic electroluminescence device in which a reduction in luminance is suppressed and a lifetime is significantly improved. The object is achieved by an organic electroluminescence device having organic compound layers including an organic emitting layer, which is interposed between at least one pair of electrodes, in which the organic emitting layer is formed of an organic compound material containing an impurity composed of a hydroxyl group-containing compound at a concentration of less than 0.15% by mass, and a method of selecting an organic compound material for the organic electroluminescence device, the method including: determining the content of the impurity; and selecting an organic compound material in which the content is less than 0.15% by mass so that the material is used for forming the organic emitting layer. Provided are a coating film-forming ink, a method of forming a thin film, and a method of producing an organic electroluminescence device.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: November 19, 2013
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Takayasu Sado, Kiyoshi Ikeda, Kenichi Fukuoka, Chishio Hosokawa
  • Publication number: 20120305908
    Abstract: In an organic electroluminescence device including a cathode and an anode, at least an emitting layer and an electron transporting layer are provided between the cathode and the anode. The emitting layer contains a host material formed of a naphthacene derivative represented by the following formula (1) and a dopant material formed of a compound having a pyrromethene skeleton represented by the following formula (2) or a metal complex of the compound. The electron transporting layer is preferably a benzoimidazole derivative.
    Type: Application
    Filed: August 14, 2012
    Publication date: December 6, 2012
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Chishio HOSOKAWA, Takayasu Sado, Kiyoshi Ikeda
  • Publication number: 20120299473
    Abstract: There are provided an aminoanthracene derivative having an end substituent, such as a dibenzofuran ring, that is bonded at a position other than the 2-position in the formula (1) to anthracene through a nitrogen atom, and an organic electroluminescent device containing a cathode and an anode, and therebetween one or plural organic thin film layers containing at least a light emitting layer, at least one layer of the organic thin film layers containing the aminoanthracene derivative. The organic electroluminescent device has a long lifetime and a high luminous efficiency. (In the formula, R1, m and Ar1 to Ar4 have the meanings described in claim 1.
    Type: Application
    Filed: February 4, 2011
    Publication date: November 29, 2012
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado
  • Patent number: 8278819
    Abstract: In an organic electroluminescence device including a cathode and an anode, at least an emitting layer and an electron transporting layer are provided between the cathode and the anode. The emitting layer contains a host material formed of a naphthacene derivative represented by the following formula (1) and a dopant material formed of a compound having a pyrromethene skeleton represented by the following formula (2) or a metal complex of the compound. The electron transporting layer is preferably a benzoimidazole derivative.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: October 2, 2012
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Chishio Hosokawa, Takayasu Sado, Kiyoshi Ikeda
  • Publication number: 20120223295
    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: February 6, 2012
    Publication date: September 6, 2012
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Tetsuya Inoue, Mitsunori Ito, Tomoki Kato, Kumiko Hibino, Kazuki Nishimura, Takayasu Sado
  • Publication number: 20120126208
    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: November 22, 2011
    Publication date: May 24, 2012
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yuichiro Kawamura, Hiroyuki Saito, Hitoshi Kuma, Masahiro Kawamura, Yukitoshi Jinde, Hirokatsu Ito, Takayasu Sado, Sayaka Mizutani
  • Publication number: 20120126209
    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: Application
    Filed: November 22, 2011
    Publication date: May 24, 2012
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yuichiro Kawamura, Hiroyuki Saito, Hitoshi Kuma, Masahiro Kawamura, Yukitoshi Jinde, Hirokatsu Ito, Takayasu Sado, Sayaka Mizutani
  • Publication number: 20120037890
    Abstract: A pyrromethene-boron complex compound represented by the following formula (1); wherein Z1 and Z2 are independently a hydrogen atom, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group or a substituted or unsubstituted aryloxy group, at least one of Z1 and Z2 is an alkoxy group substituted with a fluorine atom or an aryloxy group substituted with a fluorine atom or a fluoroalkyl group, and Z1 and Z2 may form a ring.
    Type: Application
    Filed: February 25, 2010
    Publication date: February 16, 2012
    Inventors: Fumio Okuda, Kiyoshi Ikeda, Takayasu Sado, Takahiko Ochi, Yoshimitsu Tanabe, Bunji Sawano
  • Publication number: 20110226992
    Abstract: An organic electroluminescence material composition including an organic electroluminescence material and a solvent, the organic electroluminescence material being a naphthacene derivative, and the solvent being a solvent which is represented by the following formula (1).
    Type: Application
    Filed: September 16, 2009
    Publication date: September 22, 2011
    Inventors: Motohiro Takeshima, Kiyoshi Ikeda, Takayasu Sado, Tetsuya Inoue, Yoshiaki Obana, Yukio Miyaki, Keisuke Matsuo, Yasunori Kijima
  • Publication number: 20090053488
    Abstract: An organic electroluminescence device includes: an anode; a cathode; and a luminescent layer (5) provided between the anode and the cathode. In the organic electroluminescence device, the luminescent layer (5) includes two or more doped regions (51) each of which contains a luminescent dopant, and at least one non-doped region (52) in which no luminescent dopant is contained.
    Type: Application
    Filed: August 16, 2007
    Publication date: February 26, 2009
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Yukitoshi JINDE, Takayasu Sado, Kiyoshi Ikeda, Kenichi Fukuoka