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Journal Article
Highly Efficient Orange Phosphorescent Organic Light-emitting Diodes with (4-(3,5-dimethylphenyl)-2-(m-tolyl)pyridine)-based Iridium Complex
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- Authors
- Hyung Jin Cheon, Chul Woong Joo, Da Yeon Lee, Gunel Huseynova, Jae-Hyun Lee, Jonghee Lee, Yun-Hi Kim
- Issue Date
- 2021-02
- Citation
- Dyes and Pigments, v.186, pp.1-8
- ISSN
- 0143-7208
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- A new (4-(3,5-dimethylphenyl)-2-(m-tolyl)pyridine)-based iridium complex was synthesized for highly efficient orange phosphorescent organic light-emitting diodes (PhOLEDs). The effect of introduction of a methyl substituent into the 4-position of the phenyl ring in a phenylpyridine chelating ligand was studied. The PhOLEDs based on this newly-synthesized iridium complex exhibited maximum external quantum and current efficiencies of 20.33% and 61.16 cd/A, respectively. These respective values maintained over 15% and 48 cd/A even at a very high luminance of 15000 cd/m2 with Commission Internationale de l'Eclairage coordinates of (0.49, 0.51).
- KSP Keywords
- Highly efficient, Iridium complex, Methyl substituent, Phenyl ring, chelating ligand, light emitting diodes(LED), organic light emitting diode(OLED), phosphorescent organic light-emitting diodes