A study on the characteristics of OLEDs using Ir complex for blue phosphorescence |
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| Institution: | 1. Department of Information Display, Hongik University, Seoul 121-791, Republic of Korea;2. Department of Electronic Engineering, Hongik University, Seoul 121-791, Republic of Korea;3. Department of Science, Hongik University, Seoul 121-791, Republic of Korea;4. Department of Industrial Chemistry, Hongik University, Seoul 121-791, Republic of Korea;5. Center for Organic Materials and Information Device, Hongik University, Seoul 121-791, Republic of Korea |
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| Abstract: | Several iridium-based complexes were investigated as phosphorescent dopants. They achieved about 100% internal quantum efficiency, due to utilization of both singlet and triplet excitons in the radiative processes. We have fabricated phosphorescent OLEDs with 8% Ir(ppz)3 as a triplet emissive dopant in various host materials. CBP, which has an efficiency of 0.20 cd/A, is the best host material. Furthermore, we synthesized metal-organic phosphor complexes based on Ir with different ligands as to (Im)2Ir(acac), (Im-R)2Ir(acac), and Ir(ppz)2(acac). |
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