Author/Authors :
Chao، نويسنده , , Yu-Chiang and Huang، نويسنده , , Sheng-Yang and Chen، نويسنده , , Chun-Yu and Chang، نويسنده , , Yu-Fan and Meng، نويسنده , , Hsin-Fei and Yen، نويسنده , , Feng-Wen and Lin، نويسنده , , I-Feng and Zan، نويسنده , , Hsiao-Wen and Horng، نويسنده , , Sheng-Fu، نويسنده ,
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. 17 cd/A current efficiency, 10 lm/W power efficiency, and 8.8% external quantum efficiency can be achieved for the device with CsF/Al cathode. 10,000 cd/m2 is reached at 10 V. Similar quantum efficiency is also achieved with an electron-transport layer and LiF/Al cathode.
