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HL: Fachverband Halbleiterphysik
HL 15: Organic Semiconductors: Optics and Photonics
HL 15.2: Vortrag
Dienstag, 10. März 2026, 09:45–10:00, POT/0006
Subwavelength OLED pixels based on plasmonic electrodes — •Leo Siebigs1, Cheng Zhang2, Björn Ewald1, Luca Steinbrecher2, Maximilian Rödel1, Thomas Fleischmann1, Monika Emmerling2, Bert Hecht2, and Jens Pflaum1 — 1Experimental Physics 6, University of Würzburg, 97074 Würzburg — 2Experimental Physics 5, University of Würzburg, 97074 Würzburg
Next-generation display technologies, such as augmented and virtual reality, demand the continued miniaturisation of individual pixels. A novel approach towards achieving the necessary ultra-high resolution involves subwavelength organic light-emitting diode (OLED) pixels based on plasmonic nanoelectrodes. The nanoelectrode acts as an optical antenna, ensuring efficient light-outcoupling to the far-field and control over the emission characteristics by adjusting the antenna geometry. However, upon scaling the pixel dimensions below the wavelength of light, sharp nanoelectrode contours dominate the device operation. As a result (i) filament growth leads to rapid device failure and (ii) spatially imbalanced charge-carrier transport and recombination limits the external quantum efficiency (EQE). We address these challenges by selectively passivating the nanoelectrode edges with an insulating layer and defining the active area via a nanoaperture. As proof-of-concept, efficient and stable hole-injection is shown in hole-only devices based on gold nanoelectrodes. For the first time, we demonstrate light extraction from individually addressable 300 nm x 300 nm plasmonic OLED pixels with a maximum luminance of 3000 cd m−2 and 1% EQE. C., Zhang et al., Sci. Adv. 2025, DOI: 10.1126/sciadv.adz8579
Keywords: OLED; nanophotonics; nanoantenna; TADF; display technology