Patents Assigned to Idemtisu Kosan Co., Ltd.
  • Material for organic electroluminescence device and organic electroluminescence device using the same
    Patent number: 8785003
    Abstract: An organic EL device material includes at least a unit including 3,5-biscarbazolylphenyl group, a unit including 4-carbazolylphenyl group, and a compound including a unit including a nitrogen-containing aromatic heterocyclic ring bonding the unit including 3,5-biscarbazolylphenyl group and the unit including 4-carbazolylphenyl group.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: July 22, 2014
    Assignee: Idemtisu Kosan Co., Ltd.
    Inventors: Tetsuya Inoue, Kumiko Hibino, Kei Yoshida, Kazuki Nishimura, Toshihiro Iwakuma