Ao Ying, Shaolong Gong

A Rising Star: Luminescent Carbene‐Metal‐Amide Complexes

  • General Chemistry
  • Catalysis
  • Organic Chemistry
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AbstractCoinage metal (gold, silver, and copper) complexes are attractive candidates to substitute the widely studied noble metal complexes, such as, iridium(III) and platinum(II), as luminescent materials in organic light‐emitting diodes (OLEDs). However, the development of coinage metal complexes exhibiting high emission quantum yields and short exciton lifetimes is still a formidable challenge. In the past few years, coinage metal complexes featuring a carbene‐metal‐amide (CMA) motif have emerged as a new class of luminescent materials in OLEDs. Thanks to the coinage metal‐bridged linear geometry, coplanar conformation, and the formation of excited states with dominant ligand‐to‐ligand charge transfer character and reduced metal d‐orbital participation, most CMA complexes have high radiative rates via thermally activated delayed fluorescence. Currently, the family of CMA complexes have rapidly evolved and remarkable progresses in CMA‐based OLEDs have been made. Here, a Concept article on CMA complexes is presented, with a focus on molecular design principles, the correlation between molecular structure/conformation and optoelectronic properties, as well as OLED performance. The future prospects of CMA complexes are also discussed.

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