Blue and green phosphorescent liquid-crystalline iridium complexes with high hole mobility

Research output: Contribution to journalArticlepeer-review


  • Christopher P. Cabry
  • Manjun Xiao
  • Louise Male
  • Stephen J. Cowling
  • Duncan W. Bruce
  • Junwei Shi
  • Weiguo Zhu

Colleges, School and Institutes

External organisations

  • XiangTan University
  • University of York


Blue- and green-emitting cyclometalated liquid-crystalline iridium complexes are realized by using a modular strategy based on strongly mesogenic groups attached to an acetylacetonate ancillary ligand. The cyclometalated ligand dictates the photophysical properties of the materials, which are identical to those of the parent complexes. High hole mobilities, up to 0.004cm2V-1s-1, were achieved after thermal annealing, while amorphous materials show hole mobilities of only approximately 10-7-10-6cm2V-1s-1, similar to simple iridium complexes. The design strategy allows the facile preparation of phosphorescent liquid-crystalline complexes with fine-tuned photophysical properties.


Original languageEnglish
Pages (from-to)1618-1621
JournalChemistry: A European Journal
Issue number5
Early online date22 Dec 2015
Publication statusPublished - 20 Jan 2016


  • Hole mobility, Iridium, Liquid crystals, Phosphorescence, Smectic phases