Cationic Iridium(III) Complexes Bearing Different Bulky N,N′-Chelating Ligands

Wai Yeung Wong, Nga Yuen Chau, Qiwei Wang, Lu Jiang, Junlong Li, Zelin Sun

Research output: Journal article publicationJournal articleAcademic researchpeer-review


Six cationic iridium(III) complexes bearing different bulky N,N′-chelating ligands were successfully synthesized and characterized by spectroscopic, electrochemical, thermal and photophysical methods. Because the molecular quenching and self-aggregation within molecules would deteriorate the device efficiency, the bulky molecules can suppress these problems and improve the device performance. The best doped organic light-emitting diodes based on these charged Ir(III) complex E1 exhibited Lmax of 26,800 cd/m2, ηL, max of 35.0 cd/A and ηP, max of 18.5 lm/W, which also showed a small efficiency roll-off in the range of 100 to 1000 cd/m2. Graphical Abstract: (Figure presented.)

Original languageEnglish
JournalJournal of Inorganic and Organometallic Polymers and Materials
Publication statusAccepted/In press - 25 Jun 2024


  • Cationic complexes
  • Iridium
  • Organic light-emitting devices
  • Phosphorescence
  • Synthesis

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry


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