한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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High Contrast Red, Green, and Blue Organic Lightemitting Diodes using Inorganic Metal Multi Layers

  • Kim, You-Hyun (School of Display Engineering, Hoseo Univeristy) ;
  • Lee, Sang-Youn (Semiconductor Display Engineering, Hoseo Univeristy) ;
  • Song, Wook (School of Display Engineering, Hoseo Univeristy) ;
  • Mong, Mei (School of Display Engineering, Hoseo Univeristy) ;
  • Kim, Woo-Young (School of Display Engineering, Hoseo Univeristy)
  • Published : 2009.10.12
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Abstract

High contrast red, green and blue organic light-emitting diodes were fabricated using inorganic metal multi layer composed of thin Al, KCl and thick Al and then were compared to optical and electrical characteristics with the attached polarizer and conventional OLEDs. Ambient light reflection of OLED using inorganic metal layer, polarizer and conventional metal layer were 29.2, 31.1 and 82.5% respectively. Optical characteristics of OLEDs using inorganic metal layer were max luminescence of 13040 cd/m2 and luminous efficiency of 2.12 cd/A at 8V whereas OLEDs using polarizer has 8456 cd/m2 and 1.43 cd/A at 8V each. OLEDs including inorganic metal multi layers show significant technical advantages in achieving high performance of OLED display with improved contrast ratio of 251:1, specifically in Red OLED.

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