The New Iridium Complexes Involving Pyridylpyridine Derivatives for the Saturated Blue Emission
- Authors
- Park, Hye Rim; Lim, Dong Hwan; Kim, Young Kwan; Ha, Yunkyoung
- Issue Date
- Jan-2012
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Iridium Complex; Blue Prosphorescence; OLED
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.12, no.1, pp.668 - 673
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 12
- Number
- 1
- Start Page
- 668
- End Page
- 673
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/18203
- DOI
- 10.1166/jnn.2012.5410
- ISSN
- 1533-4880
- Abstract
- To obtain a saturated blue phosphorescent material with a good color purity, we have synthesized the new blue emitting iridium complexes with 2, 6-difluoro-3-(4-methylpyridin-2-yl)pyridine (4-Medfpypy) as a main ligand. We expected that the LUMO energy levels of the complex might increase upon introduction of an electron donating group such as a methyl group to the pyridyl moieties of the ligand, leading to a wide energy gap of the complex to give the saturated blue emission. We have also introduced a variety of the ancillary ligands to the iridium center to compare the effect of the ancillary ligards on the emission of their complexes. The resulting iridium complexes, Ir(4-Me-dfpypy)(3), Ir(4-Me-dfpypy)(2)(acac), Ir(4-Me-dfpypy)(2)(pic) and Ir(4-Me-dfpypy)(2)(trzl-CH3) where acac, plc, and trzl-CH3 represent acetylacetonate, picolinate, and 2-(5-methyl-2H-1,2,4-triazol-3-yl) pyridinate, respectively exhibited the blue emission at 451, 447, 440 and 425 nm in CH2Cl2 solution. The organic light emitting device (OLED) employing homoleptic Ir(4-Me-dfpypy)(3) as the blue dopant was prepared and their electroluminescence was investigated. Ir(4-Me-dfpypy)(3) exhibited the blue emission of CIE coordinates (0.22, 0.32).
- 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/18203)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.