It has long been a challenge to achieve iridium(III) complexes with emission colors covering the whole visible and near-infrared wavelengths, by using similar cyclometalating ligands. Herein, a series of iridium(III) complexes that accomplish broadly tunable phosphorescence from 420 to 729 nm through the use of trifluoromethyl substituents and other conjugated units such as [1,2,5]thiadiazolo[3,4-c]pyridine in the cyclometalating ligands are reported. The peak external quantum efficiencies of 7.1%, 20.0%, 14.0%, 4.0%, and 16.0% are achieved for deep-blue, green, red, near-infrared, and white phosphorescent organic light-emitting diodes, respectively, by using these iridium(III) complexes.
Scopus Subject Areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- full-color emission
- iridium complexes
- organic light-emitting diodes
- trifluoromethyl substituent