한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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Effects of dielectric capping layer in the phosphorescent top emitting organic light emitting diodes

  • Kim, Sei-Yong (Department of Materials Science and Engineering and Center for OLED, Seoul National University) ;
  • Leem, Dong-Seok (Department of Materials Science and Engineering and Center for OLED, Seoul National University) ;
  • Lee, Jae-Hyun (Department of Materials Science and Engineering and Center for OLED, Seoul National University) ;
  • Kim, Jang-Joo (Department of Materials Science and Engineering and Center for OLED, Seoul National University)
  • Published : 2008.10.13
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Abstract

Effects of a dielectric capping layer on the luminous characteristics of top emitting organic light emitting diodes (TOLEDs) have been analyzed using a classical electromagnetic theory. Special attention was given to the influence of the cavity length on the effectiveness of the capping layer. The luminance characteristics of the TOLEDs influenced by the combined effects of the cavity length and the capping layer thickness. Furthermore, these combined effects also modify the emission spectrum and pattern of the TOLEDs, which result in the improvement of total luminance of the device, but no significant change in the device out-coupling efficiency.

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