Blue and Green Phosphorescent Liquid-Crystalline Iridium Complexes with High Hole Mobility

Yafei Wang, Christopher P. Cabry, ManJun Xiao, Louise Male, Stephen J. Cowling, Duncan W. Bruce*, Junwei Shi, Weiguo Zhu, Etienne Baranoff

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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 0.004 cm2 V-1 s-1, were achieved after thermal annealing, while amorphous materials show hole mobilities of only approximately 10-7-10-6 cm2 V-1 s-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
Number of pages4
JournalChemistry : A European Journal (Weinheim an der Bergstrasse, Germany)
Volume22
Issue number5
Early online date22 Dec 2015
DOIs
Publication statusPublished - 26 Jan 2016

Bibliographical note

© 2016 Wiley. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

Keywords

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

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