Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 99, Issue 1, Pages 251-254Publisher
SPRINGER
DOI: 10.1007/s00339-009-5511-9
Keywords
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Funding
- National Natural Science Foundation of China (NNSFC) [60876043]
- Chinese Academy of Sciences [IS-CAS2008T11]
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We report highly efficient and stable organic light-emitting diodes (OLEDs) with MoO3-doped perylene-3, 4, 9, 10-tetracarboxylic dianhydride (PTCDA) as hole injection layer (HIL). A green OLED with structure of ITO/20 wt% MoO3: PTCDA/NPB/Alq(3)/LiF/Al shows a long lifetime of 1012 h at the initial luminance of 2000 cd/m(2), which is 1.3 times more stable than that of the device with MoO3 as HIL. The current efficiency of 4.7 cd/A and power efficiency of 3.7 lm/W at about 100 cd/m(2) have been obtained. The charge transfer complex between PTCDA and MoO3 plays a decisive role in improving the performance of OLEDs.
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