Efficiency Improvement of OLEDs with a Variation of Cathodes

음전극 변화에 따른 유기 발광 소자의 효율 향상

  • Published : 2002.07.08

Abstract

We have investigated the effects of cathode in organic light-emitting diodes of ITO/TPD/$Alq_3$/Cathodes(Al, LiF/Al, Ca/Al, and LiAl) by measuring current-voltage-luminance characteristics. The device with cathodes other than Al cathode shows the efficiency by an oder of one compared with Al cathode only. This improvement is due to a reduction of barrier height in cathode side.

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