한국정보디스플레이학회:학술대회논문집

한국정보디스플레이학회 (The Korean Infomation Display Society)
권호 표지

Improved Efficiency of Polymer LEDs using Electron Transporting Layer

  • Kim, Jong-Lae (Dept. of Fiber & Polymer Science, Seoul National University) ;
  • Kim, Jai-Kyeong (Polymer Materials Laboratory, Korea Institute of Science and Technology) ;
  • Cho, Hyun-Nam (Polymer Materials Laboratory, Korea Institute of Science and Technology) ;
  • Kim, Dong-Young (Polymer Materials Laboratory, Korea Institute of Science and Technology) ;
  • Hong, Sung-Il (Dept. of Fiber & Polymer Science, Seoul National University) ;
  • Kim, Chung-Yup (Polymer Materials Laboratory, Korea Institute of Science and Technology)
  • 발행 : 2000.01.13
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

We report the use of fluorene based copolymers containing quinoline(POF66, PIF66) and pyridine(PFPV) units as electron transporting polymers for multi-layered LEDs. Double-layer device structure combining PIF66 as electron-transporting layer with the emissive MEHPPV showed a maximum quantum efficiency of 0.03%, which is 30 fold increased compared with ITO/MEHPPV/Al single-layer device. PFPV layer increased the quantum efficiency up to 0.1% in the device structure of ITO/(P-3:PVK)/PFPV/Al. The ETL with the electron deficient moiety improved the LED performance by the characteristics of electron transporting as well as hole blocking between emissive layer and metal cathode.

키워드