Sky-Blue-Emitting Dendritic Alkynylgold(III) Complexes for Solution-Processable Organic Light-Emitting Devices

• Published in: Journal of the American Chemical Society Vol. 139; no. 30; pp. 10539 - 10550
• Main Authors: Lee, Chin-Ho, Tang, Man-Chung, Wong, Yi-Chun, Chan, Mei-Yee, Yam, Vivian Wing-Wah
• Format: Journal Article
• Language: English
• Published: WASHINGTON American Chemical Society 02.08.2017; Amer Chemical Soc
• Subjects: Chemistry; Chemistry, Multidisciplinary; Physical Sciences; Science & Technology; GOLD(III) COMPLEXES; TUNABLE COLOR; ELECTROPHOSPHORESCENT DEVICES; QUANTUM YIELDS; ENERGY-TRANSFER; CYCLOMETALATED PLATINUM(II) COMPLEXES; EFFICIENT; C-N-C; PHOSPHORESCENT DENDRIMER; IRIDIUM DENDRIMERS
• ISSN: 0002-7863; 1520-5126
• DOI: 10.1021/jacs.7b05872

A new class of tridentate ligand-containing cyclometalated gold­(III) complexes featuring dendritic alkynyl ligands with carbazole moieties as dendrons and peripheral groups has been synthesized up to the third generation. High-performance solution-processable organic light-emitting devices (OLEDs) with maximum current efficiency of up to 23.7 cd A–1 and external quantum efficiency of up to 6.9% have been realized by a simple spin-coating technique. With the incorporation of bulky carbazole moieties to form higher generation dendrimers, the undesirable excimeric emission could be effectively reduced, allowing the fine-tuning of the emission color toward the blue region. This represents the first successful demonstration of sky-blue-emitting alkynylgold­(III) complexes and its application in solution-processable OLEDs.