한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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Alq$_3-based$ Organic Light-Emitting Devices with Al/NaF cathodes: Performance Enhancement and Interface Electronic Structures

  • Park, Y. (Nano-Surface Group, KRISS) ;
  • Lee, J. (SAIT AE Center) ;
  • Kim, D.Y. (Chemistry and Physics Division, Hallym University) ;
  • Chu, H.Y. (Basic Research Laboratory, ETRI) ;
  • Lee, H. (Basic Research Laboratory, ETRI) ;
  • Do, L.M. (Basic Research Laboratory, ETRI)
  • Published : 2003.07.09
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Abstract

The device characteristics and the interface electronic structures of organic light-emitting devices based on /tris-(8-hydroxyquinoline)aluminum ($Alq_3$) were investigated with Al/NaF cathode. The Al/NaF cathode greatly improved the performance of the device over the Al-only cathode. A series of photoelectron spectroscopy studies on cathode structures including Al/LiF and $Al/CaF_2$ revealed that the performance enhancement originated mainly from the HOMO peak shift upon the fluoride deposition rather than the formation of the gap states

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