Bimetallic Cyclometalated Iridium(III) Diastereomers with Non‐Innocent Bridging Ligands for High‐Efficiency Phosphorescent OLEDs1. Issue 43 (11th September 2014)

• Record Type: Journal Article
• Authors: Zheng, Yonghao; Batsanov, Andrei S.; Fox, Mark A.; Al‐Attar, Hameed A.; Abdullah, Khalid; Jankus, Vygintas; Bryce, Martin R.; Monkman, Andrew P.
• Is Part Of: Angewandte Chemie international edition. Volume 53:Issue 43(2014)
• Page Start: 11616
• Page End: 11619
• Publication Date: 2014-09-11
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201407475
• Languages: English
• ISSNs: 1433-7851

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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.</p> </abstract>