Journal
DALTON TRANSACTIONS
Volume 44, Issue 18, Pages 8419-8432Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4dt03127j
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Funding
- Engineering and Physical Sciences Research Council [EP/K039210/1] Funding Source: researchfish
- EPSRC [EP/K039210/1] Funding Source: UKRI
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In this study, a series of four formyl-substituted chloro-bridged iridium(III) dimers were prepared. Their absorption, photophysical and electrochemical properties were studied in dichloromethane solution. It was found that as the formyl content increased on the cyclometalating ligands, emission unexpectedly became brighter. Organic light-emitting diodes (OLEDs) were fabricated using each of these iridium dimers as the emitter. The OLED fabricated using the brightest of the series, 2b, as the dopant afforded a decent external quantum efficiency (EQE) of 2.6%. This suggests that chloro-bridged iridium dimers are potential candidates as solid-state emitters.
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