Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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INFLUENCE OF ANTHRECENE DOPING ON ELECTRICAL AND LIGHT-EMITTING BEHAYIOR OF 8-HYDROXYQUINOLINE-ALUMINUM BESED ELECTROLUMINESCENT DEVICES

  • Kinoshita, Osamu (Department of Electrical and Electronic Engineering, Ibaraki University) ;
  • Yamaguchi, Ryuichi (Department of Electrical and Electronic Engineering, Ibaraki University) ;
  • Masui, Masayoshi (Department of Electrical and Electronic Engineering, Ibaraki University) ;
  • Takeuchi, Manabu (Department of Electrical and Electronic Engineering, Ibaraki University)
  • Published : 1996.10.01
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Abstract

In order to improve EL performance, anthracene was doped into the 8-hydroxyquinoline-aluminum (Alq$^3$) light-emitting layer of organic double layered EL cells. The EL cells were fabricated on ITO glass substrates by vacuum deposition. Doping of anthracene to the light-emitting $Alq^3$layer was performed by means of co-evaporation. The doping concentration was changed in the range of 5 to 30 wt.%. It was confirmed that anthracene doping of appropriate concentration increased the available current density and brightness of the EL cells. Carrier mobility of the $Alq^3$ layer was measured by time of flight method. The influence of anthracene doping on the cell performance was discussed.

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