한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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Chemical structure of the bilayer $Ag/Li_2O$ cathode interface in organic light-emitting diodes

  • Joo, Min-Ho (Devices & Materials Laboratory, LG Electronics Institute of Technology) ;
  • Baik, Min-Kyung (Devices & Materials Laboratory, LG Electronics Institute of Technology) ;
  • Choi, Jong-Kwon (Devices & Materials Laboratory, LG Electronics Institute of Technology) ;
  • Park, Kyu-Ho (Devices & Materials Laboratory, LG Electronics Institute of Technology) ;
  • Lee, Jay-Man (Digital Display Research Laboratory, LG Electronics) ;
  • Kim, Myung-Seop (Digital Display Research Laboratory, LG Electronics) ;
  • Yang, Joong-Hwan (Digital Display Research Laboratory, LG Electronics)
  • Published : 2006.08.22
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Abstract

The chemical structure of the interface between Ag with $Li_2O$ and tri (8-hydroxyquinoline) aluminum (Alq) was investigated by using in-situ characterization of x-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS). $Li_2O$ on Ag had lower barrier height than LiF on Ag. XPS and UPS results show the interaction between $Li_2O$ and Alq leads to gap state formation in HOMO of Alq.

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