Department of Chemistry
Metallophosphors of iridium(III) containing borylated oligothiophenes with electroluminescence down to the near-infrared region
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. © 2013 Elsevier B.V. All rights reserved.
Boron, Iridium, Near-infrared emission, Organic light-emitting diodes, Phosphorescence
Source Publication Title
Journal of Organometallic Chemistry
Link to Publisher's Edition
Ho, Cheuk-Lam, Bing Yao, Baohua Zhang, Ka-Leung Wong, Wai-Yeung Wong, Zhiyuen Xie, Lixiang Wang, and Zhenyang Lin. "Metallophosphors of iridium(III) containing borylated oligothiophenes with electroluminescence down to the near-infrared region." Journal of Organometallic Chemistry 730 (2013): 144-155.