Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1443090 | Synthetic Metals | 2009 | 4 Pages |
Abstract
Quantum efficiency of blue phosphorescent organic light emitting diodes (PHOLEDs) was improved by using a stacked emitting structure which can balance holes and electrons in light emitting layer. N,N′-dicarbazolyl-3,5-benzene (mCP) doped with iridium(III) bis(4,6-(di-fluorophenyl)-pyridinato-N,C2′) picolinate (FIrpic) was used as an emitting layer with good hole injection properties near hole transport layer and 1,3-bis(triphenylsilyl)-benzene (TSB) doped with FIrpic was used as an emitting layer with good electron injection properties near electron transport layer. High quantum efficiency of 10.2% was obtained at 500 cd/m2 compared with 7.5% and 7.6% of mCP and TSB reference devices.
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Authors
Kyoung Soo Yook, Jun Yeob Lee,