Journal
CURRENT APPLIED PHYSICS
Volume 7, Issue 4, Pages 380-383Publisher
ELSEVIER
DOI: 10.1016/j.cap.2006.09.031
Keywords
OLEDs; blue phosphorescence; ligand; iridium complexes
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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)(2)Ir(acac), (Im-R)(2)Ir(acac), and Ir(ppz)(2)(acac). (c) 2006 Elsevier B.V. All rights reserved.
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