The authors thank both the EPSRC (through the DTI-LINK project XTRAOLED) and CDT Ltd. for financial support.
Light Out-Coupling Efficiencies of Organic Light-Emitting Diode Structures and the Effect of Photoluminescence Quantum Yield†
Article first published online: 22 SEP 2005
Copyright © 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Functional Materials
Volume 15, Issue 11, pages 1839–1844, November, 2005
How to Cite
Smith, L. H., Wasey, J. A. E., Samuel, I. D. W. and Barnes, W. L. (2005), Light Out-Coupling Efficiencies of Organic Light-Emitting Diode Structures and the Effect of Photoluminescence Quantum Yield. Adv. Funct. Mater., 15: 1839–1844. doi: 10.1002/adfm.200500283
- Issue published online: 27 OCT 2005
- Article first published online: 22 SEP 2005
- Manuscript Accepted: 8 JUN 2005
- Manuscript Received: 9 MAY 2005
- Light-emitting diodes, organic;
- Light-emitting materials;
- Quantum efficiency
Results obtained from modeling the light out-coupling efficiency of an organic light-emitting diode (OLED) structure containing the recently developed first-generation fac-tris(2-phenylpyridine) iridium-cored dendrimer (Ir-G1) as the emissive organic layer are reported. Comparison of the results obtained for this material with those of corresponding structures based upon small-molecule and polymer emissive materials is made. The calculations of out-coupling efficiency performed here take account of many factors, including the photoluminescence quantum yield (PLQY) of the emissive materials. Further, how each material system might perform with regard to out-coupling efficiency when a range of possible PLQYs are considered is shown. The calculations show that the very high efficiency of dendrimer-based OLEDs can be attributed primarily to their high PLQY.