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Electrical Conduction Mechanism in ITO/Alq3/Al Organic Light-emitting Diodes

  • Chung, Dong-Hoe (Department of Electrical Engineering, Kwangwoon University) ;
  • Lee, Joon-Ung (Department of Electrical Engineering, Kwangwoon University)
  • Published : 2004.02.01

Abstract

We have used ITO/Alq$_3$/Al structure to study electrical conduction mechanism in organic light-emitting diodes. Current-voltage-luminance characteristics were measured at room temperature by varying the thickness of Alq$_3$ layer from 60 to 400mm. We were able to confirm that there are three different mechanisms depending on the applied voltage region; ohmic, space-charge-limited current, and trap-charge-limit-current mechanism. And the maximum luminous efficiency was obtained when the thickness of Alq$_3$ layer is 200nm.

Keywords

References

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