Phosphorescent κ3‐(N^C^C)‐Gold(III) Complexes: Synthesis, Photophysics, Computational Studies and Application to Solution‐Processable OLEDs
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Date
2020-12-23
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Journal Article
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yes
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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 kappa(3)-(N<^>C<^>C) template have been prepared and their photophysical properties have been characterized in detail. These compounds exhibit good photoluminescence quantum efficiency (eta(PL)) 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 (eta(CE) 46.6 cd.A(-1) and eta(ext) 14.0 %), thus showcasing the potential of these motifs for the low-cost fabrication of display and illumination technologies.
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published
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Journal / series
Volume
26 (72)
Pages / Article No.
17604 - 17612
Publisher
Wiley-VCH
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Subject
emitters; Gold; OLED; phosphorescent; κ3-(N^C^C) ligand
Organisational unit
09502 - Shih, Chih-Jen / Shih, Chih-Jen
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Funding
178944 - Engineering Colloidal Perovskite Quantum Well Light Emitting Technology (SNF)