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http://dx.doi.org/10.4313/TEEM.2004.5.1.024

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)
Publication Information
Transactions on Electrical and Electronic Materials / v.5, no.1, 2004 , pp. 24-28 More about this Journal
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
Organic light-emitting diodes; Conduction mechanism; Luminous efficiency; Thickness;
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