한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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Color variation improvement by introducing double emission layers in WPLEDs

  • Kwon, Soon-Kab (Advanced Display Research Center, Kyung Hee University, Dept. of Information display, Kyung Hee University) ;
  • Lee, Yong-Kyun (Advanced Display Research Center, Kyung Hee University, Dept. of Information display, Kyung Hee University) ;
  • Park, Tae-Jin (Advanced Display Research Center, Kyung Hee University, Dept. of Information display, Kyung Hee University) ;
  • Jeong, Su-Hyeon (Advanced Display Research Center, Kyung Hee University, Dept. of Information display, Kyung Hee University) ;
  • Jeon, Woo-Sik (Advanced Display Research Center, Kyung Hee University, Dept. of Information display, Kyung Hee University) ;
  • Kwon, Jang-Hyuk (Advanced Display Research Center, Kyung Hee University, Dept. of Information display, Kyung Hee University) ;
  • Jang, Jin (Advanced Display Research Center, Kyung Hee University, Dept. of Information display, Kyung Hee University)
  • Published : 2006.08.22
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Abstract

We have fabricated white polymeric light-emitting devices (WPLEDs) from polyfluorene-based (PFO) blue and MEH-PPV polymer blending systems. A device structure of ITO / PEDOT:PSS / Blending polymer / Blue polymer / LiF / Al was employed. This structure of double emission layers results in the significant improvement of white color shift phenomenon. A current efficiency of 4.67 cd/A ($3,900cd/m^2$, 6.4V) and a brightness value of $17,600cd/m^2$ at 9.4 V with (0.34, 0.35) CIE coordinates at 5V and (0.29, 0.29) at 9V were obtained.

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