Record operational stability and lasing-level current densities enabled by incremental PeLED downscaling

Iakov Goldberg; Karim Elkhouly; Weiming Qiu; Nirav Annavarapu; Robert Gehlhaar; Cedric Rolin; Tung-Huei Ke; Jan Genoe; Paul Heremans

doi:10.1117/12.2593010

1 August 2021 Record operational stability and lasing-level current densities enabled by incremental PeLED downscaling

Iakov Goldberg, Karim Elkhouly, Weiming Qiu, Nirav Annavarapu, Robert Gehlhaar, Cedric Rolin, Tung-Huei Ke, Jan Genoe, Paul Heremans

Author Affiliations +

Proceedings Volume 11808, Organic and Hybrid Light Emitting Materials and Devices XXV; 1180810 (2021) https://doi.org/10.1117/12.2593010
Event: SPIE Organic Photonics + Electronics, 2021, San Diego, California, United States

Abstract

We present variable-size circular micro methylammonium lead iodide PeLEDs and systematically examine their performance in moderate and high current density regimes. We demonstrate the beneficial influence of device downscaling on the internal heat generation and its positive impact on lifetime. For micron size glass-based devices with external quantum efficiencies (EQE) of around 5.5 %, we achieve a T50 > 5 h at 1000 mA·cm-2 at room temperature. The scaling-down approach and device architecture optimizations allowed for pulsed driving of the PeLEDs as short as 250 ns, reaching exceptionally large current densities above 5 kA·cm-2 and radiance values above 30000 W·m-2·sr-1.

Conference Presentation

Citation Download Citation

Iakov Goldberg, Karim Elkhouly, Weiming Qiu, Nirav Annavarapu, Robert Gehlhaar, Cedric Rolin, Tung-Huei Ke, Jan Genoe, and Paul Heremans "Record operational stability and lasing-level current densities enabled by incremental PeLED downscaling", Proc. SPIE 11808, Organic and Hybrid Light Emitting Materials and Devices XXV, 1180810 (1 August 2021); https://doi.org/10.1117/12.2593010

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