Smart Design on the Cyclometalated Ligands of Iridium(III) Complexes for Facile Tuning of Phosphorescence Color Spanning from Deep-Blue to Near-Infrared

Zhao Chen, Liqi Wang, Cheuk Lam Ho, Shuming Chen, Songwut Suramitr, Aunyamanee Plucksacholatarn, Nianyong Zhu, Supa Hannongbua, Wai Yeung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

28 Citations (Scopus)


It has long been a challenge to achieve iridium(III) complexes with emission colors covering the whole visible and near-infrared wavelengths, by using similar cyclometalating ligands. Herein, a series of iridium(III) complexes that accomplish broadly tunable phosphorescence from 420 to 729 nm through the use of trifluoromethyl substituents and other conjugated units such as [1,2,5]thiadiazolo[3,4-c]pyridine in the cyclometalating ligands are reported. The peak external quantum efficiencies of 7.1%, 20.0%, 14.0%, 4.0%, and 16.0% are achieved for deep-blue, green, red, near-infrared, and white phosphorescent organic light-emitting diodes, respectively, by using these iridium(III) complexes.

Original languageEnglish
Article number1800824
JournalAdvanced Optical Materials
Issue number23
Publication statusPublished - 3 Dec 2018


  • full-color emission
  • iridium complexes
  • near-infrared
  • organic light-emitting diodes
  • trifluoromethyl substituent

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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