This material is based upon work supported in part by Solvay SA, by the STC Program of the National Science Foundation under Agreement Number DMR-0120967, and by the Office of Naval Research. We thank Chun Huang for assistance in the synthesis of compound 2, Dr. Yadong Zhang and Dr. Sushanta Pal for the synthesis of compound 9, and Dr. Stephen Barlow for critical reading of our manuscript.
Optimization of Orange-Emitting Electrophosphorescent Copolymers for Organic Light-Emitting Diodes†
Article first published online: 22 SEP 2008
Copyright © 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Functional Materials
Volume 18, Issue 19, pages 3056–3062, October 9, 2008
How to Cite
Haldi, A., Kimyonok, A., Domercq, B., Hayden, L. E., Jones, S. C., Marder, S. R., Weck, M. and Kippelen, B. (2008), Optimization of Orange-Emitting Electrophosphorescent Copolymers for Organic Light-Emitting Diodes. Adv. Funct. Mater., 18: 3056–3062. doi: 10.1002/adfm.200800446
- Issue published online: 6 OCT 2008
- Article first published online: 22 SEP 2008
- Manuscript Revised: 27 JUN 2008
- Manuscript Received: 31 MAR 2008
- organic electronics;
- organic light-emitting diodes;
Orange-emitting phosphorescent copolymers containing iridium complexes and bis(carbazolyl)fluorene groups in their side chains are employed as the emissive layer in multilayer organic light-emitting diodes (OLEDs). The efficiency of the OLED devices is optimized by varying characteristics of the copolymers: the molecular weight, the iridium loading level, and the nature and length of the linker between the side chains and the polymer backbone. A maximum efficiency of 4.9 ± 0.4%, 8.8 ± 0.7 cd A−1 at 100 cd m−2 is achieved with an optimized copolymer.