Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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A Study on the fabrication and Characteristic Analysis of Organic Light Emitting Device using Inorganic Metal Multi-layer

무기금속 다층박막을 적용한 유기발광소자의 제작 및 특성 분석에 관한 연구

  • 황수웅 (건국대학교 차세대 유기디스플레이센터) ;
  • 강성종 (건국대학교 차세대 유기디스플레이센터) ;
  • 조재영 (건국대학교 차세대 유기디스플레이센터) ;
  • 김태구 (건국대학교 차세대 유기디스플레이센터) ;
  • 오환술 (건국대학교 차세대 유기디스플레이센터)
  • Published : 2005.10.01
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Abstract

IMML(Inorganic metal multi-layer) was used as cathode in the OLED devices to reduce the reflectance or ITO and increase the contrast ratio. Device structure was $ITO/{\alpha}-NPD/Alq_3:DCJTB/Alq_3/IMML/Al$. $Alq_3$ and DCJTB (4 - (dicyanomethylene) - 2 - ( 1 - propyls) 6 - methy 4H - pyrans) as host material lot red emission and red emitting guest material. IMML made three different layer: thin aluminum layer, aluminum layer doped with silicon monoxide, thick aluminum layer. The red OLED device with IMML showed the average reflectance of $4.97\%$, and then normal OLED with or without polarizer showed the average reflectance of $4.55\%$, $46\%$ at visible range from 380 nm to 780 nm. The brightness of OLED with IMML at 13 V was 5557 $cd/m^2$, and that of normal OLED with polarizer was 4872 $cd/m^2$. IMML could be the substitution for polarizer with same reflection, low cost, easy process in flat panel display market.

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References

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