We thank the EPSRC and the European Commission (THREADMILL – MRTN-CT-2006-036040) for financial support.
The Built-In Potential in Blue Polyfluorene-Based Light-Emitting Diodes†
Article first published online: 20 MAY 2008
Copyright © 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 20, Issue 12, pages 2410–2415, June 18, 2008
How to Cite
Bodrozic, V., Brown, T. M., Mian, S., Caruana, D., Roberts, M., Phillips, N., Halls, J. J., Grizzi, I., Burroughes, J. H. and Cacialli, F. (2008), The Built-In Potential in Blue Polyfluorene-Based Light-Emitting Diodes. Adv. Mater., 20: 2410–2415. doi: 10.1002/adma.200702346
- Issue published online: 18 JUN 2008
- Article first published online: 20 MAY 2008
- Manuscript Revised: 22 FEB 2008
- Manuscript Received: 15 SEP 2007
- European Commission. Grant Number: THREADMILL – MRTN-CT-2006-036040
- light-emitting diodes;
- built-in potential;
- electroabsorption spectroscopy
Energy level alignment in polyfluorene-based polymer light-emitting diodes (PLEDs) is studied with electroabsorption spectroscopy and cyclic voltammetry (CV). Using an active layer containing a blend of three polyfluorenes, it is found that the built-in potential values are determined by the interplay of the contacts' work function and the lowest and highest lying energy levels of the blend components.