Organic light-emitting diodes for high-brightness operation: self-heating and switched-back regions (Conference Presentation)

Anton Kirch; Axel Fischer; Sebastian Reineke; Matthias Liero; Jürgen Fuhrmann; Annegret Glitzky

doi:10.1117/12.2543077

10 March 2020 Organic light-emitting diodes for high-brightness operation: self-heating and switched-back regions (Conference Presentation)

Anton Kirch, Axel Fischer, Sebastian Reineke, Matthias Liero, Jürgen Fuhrmann, Annegret Glitzky

Author Affiliations +

Proceedings Volume 11277, Organic Photonic Materials and Devices XXII; 1127710 (2020) https://doi.org/10.1117/12.2543077
Event: SPIE OPTO, 2020, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Anton Kirch, Axel Fischer, Sebastian Reineke, Matthias Liero, Jürgen Fuhrmann, and Annegret Glitzky "Organic light-emitting diodes for high-brightness operation: self-heating and switched-back regions (Conference Presentation)", Proc. SPIE 11277, Organic Photonic Materials and Devices XXII, 1127710 (10 March 2020); https://doi.org/10.1117/12.2543077

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