Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Improvements of Color Purity in White OLED using $Zn(HPB)_2$ and Zn(HPB)q

$Zn(HPB)_2$와 Zn(HPB)q를 이용한 White OLED의 색순도 향상에 관한 연구

  • Jang, Su-Hyun (Department of Electrical Engineering, Dong-A University) ;
  • Back, Sun-Jin (Department of Electrical Engineering, Dong-A University) ;
  • Choi, Kou-Chea (Department of Electrical Engineering, Dong-A University) ;
  • Lee, Hak-Dae (Department of Electrical Engineering, Dong-A University) ;
  • Kwon, Young-Soo (Department of Electrical Engineering, Dong-A University)
  • Published : 2007.07.18
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Abstract

Organic light emitting diodes (OLEDs) show a lot of advantages for display purposes. Because OLEDs provide white light emission with a high efficiency and stability, it is desirable to apply OLEDs as an illumination light source and back light in LCD displays. We synthesized new emissive materials, namely $Zn(HPB)_2$ and Zn(HPB)q, which have a low molecular compound and thermal stability. We studied white OLEDs using $Zn(HPB)_2$ and Zn(HPB)q. The fundamental structures of the white OLEDs were ITO / NPB (40 nm) / $Zn(HPB)_2$ (40 nm) / Zn(HPB)q (20 nm) / LiAl (120nm). As a result, we obtained a maximum luminance of $15325cd/m^2$ at a current density of $997\;mA/cm^2$. The CIE (Commission International de l'Eclairage) coordinates are (0.28, 0.35) at an applied voltage of 9.75 V.

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