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Phosphorescent κ 3 -(N^C^C)-Gold(III) Complexes: Synthesis, Photophysics, Computational Studies and Application to Solution-Processable OLEDs


Beucher, Hélène; Kumar, Sudhir; Kumar, Roopender; Merino, Estíbaliz; Hu, Wei‐Hsu; Stemmler, Gerrit; Cuesta‐Galisteo, Sergio; González, Jorge A; Bezinge, Léonard; Jagielski, Jakub; Shih, Chih‐Jen; Nevado, Cristina (2020). Phosphorescent κ 3 -(N^C^C)-Gold(III) Complexes: Synthesis, Photophysics, Computational Studies and Application to Solution-Processable OLEDs. Chemistry - A European Journal, 26(72):17604-17612.

Abstract

Efficient OLED devices have been fabricated using organometallic complexes of platinum group metals. Still, the high material cost and low stability represent central challenges for their application in commercial display technologies. Based on its innate stability, gold(III) complexes are emerging as promising candidates for high‐performance OLEDs. Here, a series of alkynyl‐, N‐heterocyclic carbene (NHC)‐ and aryl‐gold(III) complexes stabilized by a κ3‐(N^C^C) template have been prepared and their photophysical properties have been characterized in detail. These compounds exhibit good photoluminescence quantum efficiency (ηPL) of up to 33 %. The PL emission can be tuned from sky‐blue to yellowish green colors by variations on both the ancillary ligands as well as on the pincer template. Further, solution‐processable OLED devices based on some of these complexes display remarkable emissive properties (ηCE 46.6 cd.A−1 and ηext 14.0 %), thus showcasing the potential of these motifs for the low‐cost fabrication of display and illumination technologies.

Abstract

Efficient OLED devices have been fabricated using organometallic complexes of platinum group metals. Still, the high material cost and low stability represent central challenges for their application in commercial display technologies. Based on its innate stability, gold(III) complexes are emerging as promising candidates for high‐performance OLEDs. Here, a series of alkynyl‐, N‐heterocyclic carbene (NHC)‐ and aryl‐gold(III) complexes stabilized by a κ3‐(N^C^C) template have been prepared and their photophysical properties have been characterized in detail. These compounds exhibit good photoluminescence quantum efficiency (ηPL) of up to 33 %. The PL emission can be tuned from sky‐blue to yellowish green colors by variations on both the ancillary ligands as well as on the pincer template. Further, solution‐processable OLED devices based on some of these complexes display remarkable emissive properties (ηCE 46.6 cd.A−1 and ηext 14.0 %), thus showcasing the potential of these motifs for the low‐cost fabrication of display and illumination technologies.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Scopus Subject Areas:Physical Sciences > Catalysis
Physical Sciences > Organic Chemistry
Uncontrolled Keywords:General Chemistry
Language:English
Date:23 December 2020
Deposited On:09 Feb 2021 10:03
Last Modified:10 Feb 2021 21:00
Publisher:Wiley-VCH Verlag
ISSN:0947-6539
OA Status:Closed
Publisher DOI:https://doi.org/10.1002/chem.202003571
PubMed ID:32780903
Project Information:
  • : FunderFP7
  • : Grant ID307948
  • : Project TitleNIGOCAT - Nature-Inspired Gold Catalytic Tools

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