한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)

한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
권호 표지

적색 인광 도판트를 이용한 Top emission OLED의 Transient 특성

Transient characteristics of top emission organic light emitting diodes with red phosphorescent

  • 이찬재 (전자부품연구원 디스플레이연구센터) ;
  • 문대규 (전자부품연구원 디스플레이연구센터) ;
  • 한정인 (전자부품연구원 디스플레이연구센터)
  • 발행 : 2005.05.13
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초록

In this study, we have investigated transient properties of top emission organic light emitting diode (OLED) with a red electrophosphorescent dopant. The emission spectrum shows a strong peak at 620 nm accompanied with a small peak at 675 nm in the red region. Time evolution of electrophosphorescence reveals a decay time of 703 ms at a voltage pulse of 5 V in a device with an emitting area of 20 $mm^2$. Rise and delay times vary from 450 to 14 ms and 73 to 3 ms, respectively, as the voltage amplitude increases from 4.5 to 10 V. These results are compared with the red emitting device without an electron injection layer.

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