한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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High Efficiency Red PHOLEDs with Organic Single Layer Structure

  • Jeon, Woo-Sik (Dept. of Information Display, Kyung Hee University) ;
  • Park, Tae-Jin (Dept. of Information Display, Kyung Hee University) ;
  • Yu, Jae-Hyung (Dept. of Information Display, Kyung Hee University) ;
  • Pode, Ramchandra (Department of Physics, Kyung Hee University) ;
  • Jang, Jin (Dept. of Information Display, Kyung Hee University) ;
  • Kwon, Jang-Hyuk (Dept. of Information Display, Kyung Hee University)
  • Published : 2009.10.12
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Abstract

We report simple structure red phosphorescent devices comprising only single organic layer structure. Maximum current efficiency of 9.44 cd/A and the driving voltage of 5.4 V are obtained in this single layer structure PHOLEDs, respectively. The mixed host system using electron transporting and hole transporting materials doped with $Ir(piq)_3$ provides such high efficiency and reasonable driving voltage. The principal to simplification is the direct charges injection from the metallic electrodes into mixed host materials.

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