Patents Assigned to Idemitsu Kason Co.Ltd
  • Nitrogenous Heterocycle Derivative, And Organic Electroluminescent Element Employing The Same
    Publication number: 20070200490
    Abstract: Provided is a material for an organic EL device realizing an organic EL device capable of having a high current efficiency even at a low voltage. Provided is a derivative of heterocyclic compound having a nitrogen atom represented by the following general formula (A-1) or (A-2). In the formulae, R1a to R5a each represent a substituent, Ar1a to Ar3a each represent a single bond or a divalent connecting group, and HAr represents a group represented by a general formula (A-3) or (A-4). R6a to R10a each represent a substituent.
    Type: Application
    Filed: April 4, 2005
    Publication date: August 30, 2007
    Applicant: Idemitsu Kason Co.Ltd
    Inventors: Masahiro Kawamura, Hiroshi Yamamoto, Chishio Hosokawa