Bimetallic cyclometalated iridium(III) diastereomers with non-innocent bridging ligands for high-efficiency phosphorescent OLEDs.
Bimetallic cyclometalated iridium(III) diastereomers with non-innocent bridging ligands for high-efficiency phosphorescent OLEDs.
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DOI：
10.1002/anie.201407475
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发表时间：
2014-10
影响因子：
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通讯作者：
Yonghao Zheng;A. Batsanov;M. A. Fox;H. Al-Attar;K. Abdullah;V. Jankus;M. Bryce;A. Monkman
中科院分区：
文献类型：
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作者：
Yonghao Zheng;A. Batsanov;M. A. Fox;H. Al-Attar;K. Abdullah;V. Jankus;M. Bryce;A. Monkman
利用磷光双核铱（III）的两种非对映异构体（Δ Δ/Δ Δ）和（Δ Δ/ΔΔ）在热己烷中的不同溶解度，很容易地将它们分离。桥连二芳酰肼配体在配合物的电化学和光物理中发挥着重要作用。在溶液可加工的单活性层结构中使用这些配合物作为绿光发射掺杂剂的有机发光器件（OLED）的特征在于双核金属配合物的电致发光效率非常高，达到37 cd A（-1）、14 lm W（-1）和11%的外量子效率的最大值。
Two phosphorescent dinuclear iridium(III) diastereomers (ΛΔ/ΔΛ) and (ΛΛ/ΔΔ) are readily separated by making use of their different solubilities in hot hexane. The bridging diarylhydrazide ligand plays an important role in the electrochemistry and photophysics of the complexes. Organic light-emitting devices (OLEDs) that use these complexes as the green-emissive dopants in solution-processable single-active-layer architectures feature electroluminescence efficiencies that are remarkably high for dinuclear metal complexes, achieving maximum values of 37 cd A(-1), 14 lm W(-1), and 11% external quantum efficiency.