Dresden 2026 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 22: Biocompatible Organic Semiconductors
HL 22.6: Vortrag
Mittwoch, 11. März 2026, 10:45–11:00, POT/0006
Flexible Organic Photodiodes Based on Advanced Encapsulation Strategies — •rabiul islam1,2, siddhartha saggar1,2, jakob wolansky3, darius pohl4, markus löffler4, bernd rellinghaus4, johannes benduhn3, and caroline murawski1,2 — 1Institute of Solid-State Electronics, Technische Universität Dresden, Dresden, Germany — 2Kurt Schwabe Institute for Sensor Technologies, Waldheim, Germany — 3Dresden Integrated Center for Applied Physics and Photonic Materials, Technische Universität Dresden, Dresden, Germany — 4Dresden Center for Nanoanalysis (DCN), Technische Universität Dresden, Dresden, Germany
Organic photodiodes (OPDs) are promising for biomedical applications due to their flexibility, spectral tunability, and biocompatibility, yet their moisture sensitivity demands robust encapsulation for long-term operation. Conventional flexible substrates offer limited device protection in humid conditions; to overcome this, we employed a parylene-C/ALD-deposited Al2O3/ZrO2 hybrid substrate, providing flexibility and strong barrier properties. We fabricated flexible OPDs with an ultrathin (7 nm) silver electrode on a hybrid substrate, which remained stable after 10,000 bending cycles and demonstrated high mechanical robustness. Using PM6:PC71BM as the active layer, the OPDs achieved responsivity of 0.26 A/W at -0.1 V under 639 nm illumination, retained 86% of their initial performance after 12 days in deionized water, and remained functional after one hour of machine washing, showing that parylene/nanolaminate-based ultra-flexible OPDs enable long-term operation in aqueous environments.
Keywords: organic photodiodes; flexible organic photodiodes; OPDs; flexible substrates; flexible electrodes