Journal of Information Display

The Korean Infomation Display Society (한국정보디스플레이학회)
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Efficient Deep-Blue Organic Light-emitting Diodes with Double-Emission Layers

  • Seo, Ji-Hoon (Department of Information Display, Hongik University) ;
  • Park, Jung-Sun (Department of Information Display, Hongik University) ;
  • Seo, Bo-Min (Department of Information Display, Hongik University) ;
  • Lee, Kum-Hee (Department of Chemistry, Sungkyunkwan University) ;
  • Park, Jung-Keun (Department of Chemistry, Sungkyunkwan University) ;
  • Yoon, Seung-Soo (Department of Chemistry, Sungkyunkwan University) ;
  • Kim, Young-Kwan (Department of Information Display, Hongik University)
  • Published : 2009.09.30
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Abstract

Efficient deep-blue organic light-emitting diodes were demonstrated using 4,4'-bis(9-ethyl-3-carbazovinylene)-1,1'-biphenyl doped in double-emission layers (D-EMLs). The D-EML system, which consists of 2-methyl-9,10-di(2-naphthyl)anthracene and 1,4-(dinaphthalen-2-yl)-naphthalene as blue hosts, was employed to broaden the recombination zone and to ensure the good confinement of the holes and electrons. The optimized device showed a peak current efficiency of 4.47 cd/A, a peak external quantum efficiency of 4.09%, and Commission Internationale de L'Eclairage coordinates of (0.16, 0.10).

Keywords

References

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