Patents Assigned to E-RAY OPTOELECTRONICS TECHNOLOGY
  • Carbazole derivative and organic electroluminescent devices utilizing the same and fabrication method thereof
    Patent number: 9450192
    Abstract: The present invention provides a carbazole derivative of formula (I) for an organic electroluminescent device: wherein Y represents a heteroatom selected from N, O, P, S, or a bicyclic or tricyclic heterocyclic ring; and Ar1 and Ar2 each independently represent an alkyl or aryl substituted or unsubstituted aromatic hydrocarbon, or an alkyl or aryl substituted or unsubstituted heterocyclic aromatic hydrocarbon.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: September 20, 2016
    Assignee: E-RAY OPTOELECTRONICS TECHNOLOGY
    Inventors: Banumathy Balaganesan, Kun-Feng Chiang, Huang-Ming Guo, Po-Wei Hsu