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