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Proceedings Paper

Simulation based optimization of light-outcoupling in organic light-emitting diodes
Author(s): Stefan Nowy; Jörg Frischeisen; Wolfgang Brütting
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Paper Abstract

The internal quantum efficiency of organic light-emitting diodes (OLEDs) can reach values close to 100% if phosphorescent emitters to harvest triplet excitons are used, however, the fraction of light that is actually leaving the device is considerably less. In this work we use numerical simulations to optimize light outcoupling from different OLED stacks. First, we change the distance of the emission zone to the cathode, which minimizes the excitation of surface plasmons. Then the influence of different dipole orientation of the emitter material on the light outcoupling is studied. Finally, a metal-free, transparent OLED stack reported by Meyer et al.,1 where no plasmons can be excited, is investigated for improved outcoupling efficiency.

Paper Details

Date Published: 27 August 2009
PDF: 9 pages
Proc. SPIE 7415, Organic Light Emitting Materials and Devices XIII, 74151C (27 August 2009); doi: 10.1117/12.824858
Show Author Affiliations
Stefan Nowy, Univ. Augsburg (Germany)
Jörg Frischeisen, Univ. Augsburg (Germany)
Wolfgang Brütting, Univ. Augsburg (Germany)

Published in SPIE Proceedings Vol. 7415:
Organic Light Emitting Materials and Devices XIII
Franky So; Chihaya Adachi, Editor(s)

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