Dresden 2026 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 15: Organic Semiconductors: Optics and Photonics
HL 15.3: Talk
Tuesday, March 10, 2026, 10:00–10:15, POT/0006
Near infrared OLEDs for neuroimplants — •Sabina Hillebrandt1, Sumit Mohapatra1, Ahmed Gaber Abdelmagid2, Konstantinos C. Daskalakis2, Andreas Mischok1, and Malte C. Gather1,3,4 — 1Humboldt Centre for Nano- and Biophotonics, University of Cologne, Germany — 2Department of Mechanical and Materials Engineering, University of Turku, Finland — 3School of Physics and Astronomy, University of St Andrews, United Kingdom — 4CECAD, University of Cologne, Germany
OLEDs offer spectral tunability, mechanical flexibility, and compatibility with scalable thin-film fabrication, making them strong candidates for biointegrated photonic technologies. Near-infrared (NIR) OLED emission can penetrate deep into tissue and may enable neuromodulation without the need for genetic interventions.
We present the development of high-brightness, top-emitting NIR OLEDs specifically engineered for implantable neurotechnology. Using optimized emitter-host combinations, microcavity tuning, and customized charge-transport layers, these devices exhibit peak emission above 800 nm with no measurable output below 700 nm, thereby reducing off-target excitation and tissue scattering. The devices achieve power densities approaching 0.1 mW/mm^2, levels relevant for neuromodulation, while maintaining both thermal stability and robust operational performance. To further refine spectral purity and directional control, we integrate strong-coupling architectures, yielding polariton OLEDs with angular-stable NIR emission above 800 nm even on flexible, implantable polymer substrates.
Keywords: NIR OLEDs; optoelectronics; neuromodulation; flexible iplants; polariton OLEDs