Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 45, Pages 14036-14041Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201707193
Keywords
gold; ligand-to-ligand charge transfer; organic light-emitting devices (OLEDs); pincer ligands; thermally activated delayed fluorescence (TADF)
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Funding
- National Key Basic Research Program of China [2013CB834802]
- University Grants Committee Areas of Excellence Scheme [AoE/P-03/08]
- Basic Research Program of Shenzhen [JCYJ20160229123546997, JCYJ20160530184056496]
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Herein are described the synthesis, photophysical properties and applications of a series of luminescent cyclometalated AuIII complexes having an auxiliary aryl ligand. These complexes show photoluminescence with emission quantum yields of up to 0.79 in solution and 0.84 in thin films (4 wt% in PMMA) at room temperature, both of which are the highest reported values among AuIII complexes. Thermally activated delayed fluorescence (TADF) is the emission origin for some of these complexes. Solution-processed OLEDs made with these complexes showed sky-blue to green electroluminescence with external quantum efficiencies (EQEs) of up to 23.8%, current efficiencies of up to 70.4 cdA(-1), and roll-off of down to 1%, highlighting the bright prospect of AuIII-TADF emitters in OLEDs.
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