Synthesis, Structures, and Luminescent Properties of a Yellow-Emitting Iridium Complex

Li Ying Zhang; Xiu Ying Liu

doi:10.4028/www.scientific.net/AMR.496.294

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 496Synthesis, Structures, and Luminescent Properties...

Synthesis, Structures, and Luminescent Properties of a Yellow-Emitting Iridium Complex

Abstract:

The synthesis, structure and luminescent properties of a cyclometalated iridium (ΙΙΙ) complex are reported. The cyclometalated ligand and auxiliary ligand are 2-(2-fluorophenyl)-benzothiazole (F-BT) and acetylacetone (Hacac), respectively. The complex (F-BT)2Ir(acac) exhibits bright photoluminescence (PL) at room temperature with a high solution PL quantum efficiency of 0.62. Organic electroluminescent (EL) devices are fabricated employing (F-BT)2Ir(acac) as an emissive dopant in 4,4′-N,N′-dicarbazole-biphenyl (CBP) host. EL efficiency shows weak dependence on doping concentration and current density. While the optimized device exhibits a peak efficiency of 28.5 cd/A and a maximum brightness of 49880 cd/m2. An efficiency of 22.7 cd/A at 100 mA/cm2, 80% of the maximum, can be achieved.

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Advanced Materials Research (Volume 496)

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294-297

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https://doi.org/10.4028/www.scientific.net/AMR.496.294

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March 2012

Authors:

Li Ying Zhang, Xiu Ying Liu

Keywords:

Electroluminescence, Fluorination, Iridium Complex

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