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Proceedings Paper

Organic light-emitting diodes for high-brightness operation: self-heating and switched-back regions (Conference Presentation)
Author(s): Anton Kirch; Axel Fischer; Sebastian Reineke; Matthias Liero; Jürgen Fuhrmann; Annegret Glitzky

Paper Abstract

Organic light-emitting diodes (OLEDs) suffer from strong electrothermal feedback when operated with high currents. The interaction between conductivity, heat and power dissipation results in a positive feedback loop. When running an IV scan, former modeling revealed a so-called “switched-back” region where the local current density and brightness decreases although the total device current still increases. Here, we prove the existence of a switched-back region. We demonstrate that its appearance agrees with the simulation that solely uses electrothermal modeling. Our study aims to improve the long-term stability of high brightness OLED lighting tiles e.g. as applied in the automotive sector.

Paper Details

Date Published: 10 March 2020
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Proc. SPIE 11277, Organic Photonic Materials and Devices XXII, 1127710 (10 March 2020); doi: 10.1117/12.2543077
Show Author Affiliations
Anton Kirch, Integrated Ctr. for Applied Physics and Photonic Materials, TU Dresden (Germany)
Axel Fischer, Integrated Ctr. for Applied Physics and Photonic Materials, TU Dresden (Germany)
Sebastian Reineke, Integrated Ctr. for Applied Physics and Photonic Materials, TU Dresden (Germany)
Matthias Liero, Weierstrass-Institut für Angewandte Analysis und Stochastik (Germany)
Jürgen Fuhrmann, Weierstrass-Institut für Angewandte Analysis und Stochastik (Germany)
Annegret Glitzky, Weierstrass-Institut für Angewandte Analysis und Stochastik (Germany)


Published in SPIE Proceedings Vol. 11277:
Organic Photonic Materials and Devices XXII
Christopher E. Tabor; François Kajzar; Toshikuni Kaino, Editor(s)

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