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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Electroluminescent Characteristics of Green Phosphorescent Organic Light Emitting Devices with the Mixed Host Layer of TCTA:TAZ between TCTA and TAZ

TCTA-TAZ 사이 TCTA:TAZ 혼합호스트 층을 갖는 녹색 인광소자의 전계발광 특성

  • Jang, J.G. (Dept. of Electronics Eng., Dankook University) ;
  • Shin, S.B. (Dept. of Electronics Eng., Dankook University) ;
  • Shin, H.K. (Dept. of Electronics Eng., Dankook University)
  • Published : 2008.06.19
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Abstract

New high efficiency green light emitting phosphorescent devices with emission layers of [TCTA/TCTA:TAZ/TAZ]:Ir$(ppy)_3$ have been fabricated and evaluated in this paper. Among the devices having different thicknesses of TCTA:TAZ mixed layer in the total 300$\AA$-thick host of TCTA(80$\AA$)/TCTA:TAZ (50~100$\AA$)/TAZ, the device with host of TCTA(80$\AA$)/TCTA:TAZ(90$\AA$)/TAZ(130$\AA$) showed the best electroluminescent characteristics with the current density of 95 mA/$cm^2$ and luminance of 25,000 cd/$m^2$ at an applied voltage of 10V. The maximum current efficiency was 52 cd/A under the luminance of 400 cd/$m^2$.

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