Metallophosphors of iridium(III) containing borylated oligothiophenes with electroluminescence down to the near-infrared region

Cheuk Lam Ho, Bing Yao, Baohua Zhang, Ka Leung Wong, Wai Yeung Wong, Zhiyuen Xie, Lixiang Wang, Zhenyang Lin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

40 Citations (Scopus)


The synthesis, structural, electrochemical and photophysical studies of a series of cyclometalated iridium(III) complexes with functionalized borylated oligothiophene ligands are reported. The effect of oligothiophene chain length on the photophysical properties of these metal complexes was examined in detail and their excited state properties can be controlled by increasing the number of thienyl rings in the cyclometalating ligand, thus allowing the emission to be tuned from red to near-infrared. All of the iridium(III) complexes were utilized in the fabrication of phosphorescent organic light-emitting diodes and their device performances were investigated. These electrophosphors emit in the red to near-infrared regions. The present work enables the rational design of new borylated iridium phosphors by synthetically tailoring the structure of oligothiophene-based pyridine ring that can permit color tuning toward near-infrared phosphorescence.
Original languageEnglish
Pages (from-to)144-155
Number of pages12
JournalJournal of Organometallic Chemistry
Publication statusPublished - 15 Apr 2013
Externally publishedYes


  • Boron
  • Iridium
  • Near-infrared emission
  • Organic light-emitting diodes
  • Phosphorescence

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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