Synthesis and Photophysical Studies of Blue Phosphorescent Ir(III) Complexes with Dimethylphenylphospine
- Authors
- Ham, Ho-Wan; Jung, Kyung-Yoon; Kim, Young-Sik
- Issue Date
- Feb-2012
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Phosphorescence; OLED; Ir Complexes; Blue; TDDFT
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.12, no.2, pp.1265 - 1270
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 12
- Number
- 2
- Start Page
- 1265
- End Page
- 1270
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/19035
- DOI
- 10.1166/jnn.2012.4583
- ISSN
- 1533-4880
- Abstract
- New blue emitting mixed ligand iridium(III) complexes comprising one cyclometalating, two phosphines trans to each other such as Ir{(CF3)(2)Meppy}(PPhMe3)(2)(H)(L) [L = Cl, NCMe, CN] [(CF3)(2)Meppy = 2-(3', 5'-bis-trifluoromethylphenyl)-4-methylpyridine] were synthesized and studied to tune the phosphorescence wavelength to the deep blue region and to enhance the luminescence efficiencies. To achieve deep blue emission, the trifluoromethyl group substituted on the phenyl ring and the methyl group substituted on the pyridyl ring increased HOMO-LUMO gap and achieved the hypsochromic shift. To gain insight into the factors responsible for the emission color change and the different luminescence efficiency, we investigate the electron-withdrawing capabilities of ancillary ligands using the DFT and TD-DFT calculations on the ground and excited states of the complexes. From these results, we discuss how the ancillary ligand influences the emission peak as well as the metal to ligand charge transfer (MLCT) transition efficiency. The maximum emission spectra of Ir{(CF3)(2)Meppy}(PPhMe3)(2)(H)(Cl), [Ir{(CF3)(2)Meppy}(PPhMe3)(2)(H)(NCMe)](+) and Ir{(CF3)(2)Meppy}(PPhMe3)(2)(H)(CN) were in the ranges of 441, 435, 434 nm, respectively.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Science > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/19035)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.