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Controlling Emitting Dipole Orientation with Methyl Substituents on Main Ligand of Iridium Complexes for Highly Efficient Phosphorescent Organic Light-Emitting Diodes
- Authors
- Kim, Kwon-Hyeon; Ma, Jae-Yeol; Moon, Chang-Ki; Lee, Jeong-Hwan; Baek, Jang Yeol; Kim, Yun-Hi; Kim, Jang-Joo
- Issue Date
- Sep-2015
- Publisher
- John Wiley and Sons Inc.
- Keywords
- Iridium complex; OLEDs; Organic light-emitting diodes; Orientation of emitting dipoles; Phosphorescent dye
- Citation
- Advanced Optical Materials, v.3, no.9, pp 1191 - 1196
- Pages
- 6
- Indexed
- SCIE
SCOPUS
- Journal Title
- Advanced Optical Materials
- Volume
- 3
- Number
- 9
- Start Page
- 1191
- End Page
- 1196
- ISSN
- 2195-1071
2195-1071
- Abstract
- Orientation of emission dipoles of heteroleptic iridium complexes in an emitting layer is controlled toward the horizontal direction by substituting the hydrogen atoms of the cyclometalated ligand by methyl groups and demonstrates an organic light-emitting diode with an unprecedentedly high external quantum efficiency of 34.1% and power efficiency of 157.6 lm W-1 using a new green emitter. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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