Patents Assigned to SEMICONDUCTOR ENGERGY
  • Publication number: 20070172699
    Abstract: An object of the present invention is to provide a light emitting element which has low driving voltage and can increase lifetime longer than a conventional light emitting element. One feature is to include a plurality of layers which includes a layer containing a light emitting substance between first and second electrodes, in which at least one layer of the plurality of layers contains a carbazole derivative represented by General Formula (1) and a substance having an electron accepting property with respect to the carbazole derivative represented by General Formula (1). By employing this structure, the above object can be achieved.
    Type: Application
    Filed: November 28, 2005
    Publication date: July 26, 2007
    Applicant: SEMICONDUCTOR ENGERGY
    Inventors: Harue Nakashima, Ryoji Nomura, Hiroko Abe, Satoshi Seo, Junichiro Sakata, Daisuke Kumaki, Hisao Ikeda