Highly efficient red phosphorescent Ir(III) complexes for organic light- emitting diodes based on aryl(6-arylpyridin-3-yl)methanone ligands
- Authors
- Kang, Hyun Ju; Lee, Kum Hee; Lee, Seok Jae; Seo, Ji Hyun; Kim, Young Kwan; Yoon, Seung Soo
- Issue Date
- 29-Jul-2011
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Phosphorescent organic light emitting diodes; Arylpyridine; Carbonyl groups; Ir(III) complex
- Citation
- THIN SOLID FILMS, v.519, no.19, pp.6544 - 6549
- Journal Title
- THIN SOLID FILMS
- Volume
- 519
- Number
- 19
- Start Page
- 6544
- End Page
- 6549
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/19843
- DOI
- 10.1016/j.tsf.2011.04.121
- ISSN
- 0040-6090
- Abstract
- A series of phosphorescent Ir(III) complexes 1-4 were synthesized based on aryl(6-arylpyridin-3-yl)methanone ligands, and their photophysical and electroluminescent properties were characterized. Multilayer devices with the configuration, Indium tin oxide/4,4',4 ''-tris(N-(naphthalene-2-yl)-N-phenyl-amino)triphenylamine (60 nm)/4,4'-bis(N-(1-naphthyl)-N-phenylamino)biphenyl (20 nm)/Ir(III) complexes doped in N,N'-dicarbazolyl-4,4'-biphenyl (30 nm, 8%)/2,9-dimethyl-4,7-diphenyl-phenathroline (10 nm)/tris(8-hydroxyquinoline)-aluminum (20 nm)/lithium quinolate (2 nm)/Al (100 nm), were fabricated. Among these, the device employing complex 2 as a dopant exhibited efficient red emission with a maximum luminance, luminous efficiency, power efficiency and quantum efficiency of 16200 cd/m(2) at 14.0 V. 12.20 cd/A at 20 mA/cm(2), 426 lm/W and 926% at 20 mA/cm(2), respectively, with Commission Internationale de l'Enclairage coordinates of (0.63, 037) at 12.0 V. (C) 2011 Elsevier B.V. All rights reserved.
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