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

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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High Efficiency Red Phosphorescent Organic Light Emitting Devices Using the Double Dopant System

이중 도핑을 이용한 고효율 적색 인광 유기발광소자

  • Jang, J.G. (Dept of Electronics Eng., Dankook University) ;
  • Shin, H.K. (Dept of Electronics Eng., Dankook University) ;
  • Kim, W.K. (Dept of Electronics Eng., Dankook University)
  • Published : 2008.11.06
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Abstract

A new high efficient red PhOLED using a host of $Bebq_2$ and double dopants of $(pq)_2$Ir(acac) and SEC-R411 have been fabricated and evaluated. The device doubly doped with $(pq)_2$Ir(acac) and SFC-R411 showed the current efficiency improvement of 22% under a luminance of 10000 cd/$m^2$ in comparision with the device singly doped with SFC-R411. The luminance, current efficiency and central wavelength of the doubly doped device were 9300 cd/$m^2$ at 7V, 11.1 cd/A under a luminance of 10000 cd/$m^2$ and 625 nm, respectively.

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