Extracting the emitter orientation in organic light-emitting diodes from external quantum efficiency measurements

Journal Article · Mon Jul 28 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4891680· OSTI ID:22311221

Reichardt, Lukas J.; Wehrmeister, Sebastian; Scholz, Bert J.; Mayr, Christian; Brütting, Wolfgang ^[1]; Rausch, Andreas F.; Wehlus, Thomas; Reusch, Thilo C. G. ^[2]; Ciarnáin, Rossá Mac; Danz, Norbert ^[3]

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1. Institute of Physics, University of Augsburg, 86135 Augsburg (Germany)
2. OSRAM OLED GmbH, Wernerwerkstrasse 2, 93049 Regensburg (Germany)
3. Fraunhofer Institute for Applied Optics and Precision Engineering, 07745 Jena (Germany)

Emitter orientation will play a major role in future applications of organic light-emitting diodes due to its strong impact on the efficiency of the devices. Up to now, determining the orientation of transition dipole moments required elaborate angular-dependent measurements of the light emission pattern. In this paper, we present a simplified and straightforward method to extract the emitter orientation from external quantum efficiency measurements. We demonstrate the validity of the method on three different dye-doped emitting systems.

• OSTI ID: 22311221
• Journal Information: Applied Physics Letters, Vol. 105, Issue 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIPOLE MOMENTS
DOPED MATERIALS
EMISSION
LIGHT EMITTING DIODES
ORIENTATION
QUANTUM EFFICIENCY
VISIBLE RADIATION