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Color Variation Improvement by Introducing Double Emission Layers in WPLEDs  

Kwon, Soon-Kab (Advanced Display Research Center, Kyung Hee University, Department of Information Display, Kyung Hee University)
Lee, Yong-Kyun (Advanced Display Research Center, Kyung Hee University, Department of Information Display, Kyung Hee University)
Park, Tae-Jin (Advanced Display Research Center, Kyung Hee University, Department of Information Display, Kyung Hee University)
Jeong, Su-Hyeon (Advanced Display Research Center, Kyung Hee University, Department of Information Display, Kyung Hee University)
Jeon, Woo-Sik (Advanced Display Research Center, Kyung Hee University, Department of Information Display, Kyung Hee University)
Kwon, Jang-Hyuk (Advanced Display Research Center, Kyung Hee University, Department of Information Display, Kyung Hee University)
Jang, Jin (Advanced Display Research Center, Kyung Hee University, Department of Information Display, Kyung Hee University)
Publication Information
Journal of Information Display / v.7, no.3, 2006 , pp. 19-22 More about this Journal
Abstract
White polymeric light-emitting devices (WPLEDs) have been fabricated 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 showed significant improvement of white color shift phenomenon. A current efficiency of 4.67 cd/A (3,900 $cd/m^{2}$, 6.4 V) and a brightness value of 17,600 $cd/m^{2}$ at 9.4 V with (0.34, 0.35) CIE coordinates at 5 V and (0.29, 0.29) at 9 V were achieved achieved.
Keywords
OLED; WOLED; white; PLED; polymer; color stable;
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