These authors contributed equally to this work.
Self-Host Blue-Emitting Iridium Dendrimer with Carbazole Dendrons: Nondoped Phosphorescent Organic Light-Emitting Diodes†
Article first published online: 6 DEC 2013
Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Angewandte Chemie International Edition
Volume 53, Issue 4, pages 1048–1052, January 20, 2014
How to Cite
Xia, D., Wang, B., Chen, B., Wang, S., Zhang, B., Ding, J., Wang, L., Jing, X. and Wang, F. (2014), Self-Host Blue-Emitting Iridium Dendrimer with Carbazole Dendrons: Nondoped Phosphorescent Organic Light-Emitting Diodes. Angew. Chem. Int. Ed., 53: 1048–1052. doi: 10.1002/anie.201307311
We are grateful to the 973 Project (2009CB623601 and 2009CB930603), National Natural Science Foundation of China (Nos. 20923003, 21174144 and 21074130), and Science Fund for Creative Research Groups (No. 20921061) for financial support of this research.
- Issue published online: 21 JAN 2014
- Article first published online: 6 DEC 2013
- Manuscript Revised: 24 SEP 2103
- Manuscript Received: 20 AUG 2013
- 973 Project. Grant Numbers: 2009CB623601, 2009CB930603
- National Natural Science Foundation of China. Grant Numbers: 20923003, 21174144, 21074130
- Science Fund for Creative Research Groups. Grant Number: 20921061
- supramolecular chemistry;
- synthesis design
A blue-emitting iridium dendrimer, namely B-G2, has been successfully designed and synthesized with a second-generation oligocarbazole as the dendron, which is covalently attached to the emissive tris[2-(2,4-difluorophenyl)-pyridyl]iridium(III) core through a nonconjugated link to form an efficient self-host system in one dendrimer. Unlike small molecular phosphors and other phosphorescent dendrimers, B-G2 shows a continuous enhancement in the device efficiency with increasing doping concentration. When using neat B-G2 as the emitting layer, the nondoped device is achieved without loss in efficiency, thus giving a state-of-art EQE as high as 15.3 % (31.3 cd A−1, 28.9 lm W−1) along with CIE coordinates of (0.16, 0.29).