Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7874861 | Synthetic Metals | 2011 | 5 Pages |
Abstract
Newly synthesized red Ir complexes tris[2-(4-n-hexyl-phenyl)quinoline]iridium(III) and tris[(4-n-hexylphenyl)isoquinoline)]iridium(III) with long alkyl side chains are utilized to demonstrate the high efficiency multi-layer solution-processed red organic light-emitting diodes. Solubilities of these triplet emitters are high which enable them to be uniformly dispersed in the polymer host. Blade coating method is utilized to prepare organic multi-layers without mutual dissolution between different layers. 17Â cd/A current efficiency, 10Â lm/W power efficiency, and 8.8% external quantum efficiency can be achieved for the device with CsF/Al cathode. 10,000Â cd/m2 is reached at 10Â V. Similar quantum efficiency is also achieved with an electron-transport layer and LiF/Al cathode.
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Authors
Yu-Chiang Chao, Sheng-Yang Huang, Chun-Yu Chen, Yu-Fan Chang, Hsin-Fei Meng, Feng-Wen Yen, I-Feng Lin, Hsiao-Wen Zan, Sheng-Fu Horng,