Electroluminescence from phenylenevinylene-based polymer blends
Article first published online: 14 SEP 2004
Copyright © 1993 John Wiley & Sons Ltd.
Advanced Materials for Optics and Electronics
Volume 2, Issue 4, pages 197–204, July/August 1993
How to Cite
Vestweber, H., Oberski, J., Greiner, A., Heitz, W., Mahrt, R. F. and Bässler, H. (1993), Electroluminescence from phenylenevinylene-based polymer blends. Adv. Mater. Opt. Electron., 2: 197–204. doi: 10.1002/amo.860020407
- Issue published online: 14 SEP 2004
- Article first published online: 14 SEP 2004
- Manuscript Revised: 31 MAR 1993
- Manuscript Received: 8 JAN 1993
The electroluminescent behaviour of films of poly(phenylphenylenevinylene) (PPPV), of PPPV blended with polystyrene (PS) and of PS doped with oligo(phenylenevinylene) sandwiched between indium–tin oxide (ITO) and Al contacts has been investigated. Polymer blending increases the relative quantum efficiency by up to two orders of magnitude. Studying the cell performance under application of rectangular voltage pulses as a function of temperature indicates that (i) hole injection at the ITO contact occurs by tunnelling, (ii) tunnel injection of electrons at the cathode is promoted by a space charge field across an interfacial Al2O3 layers and (iii) leakage of holes through the cathodic barrier is the main loss mechanism for holes.