Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 57: Hybrid, Organic and Perovskite Optoelectronics and Photovoltaics VIII
CPP 57.6: Vortrag
Freitag, 13. März 2026, 12:45–13:00, ZEU/LICH
Single-Component Vacuum-Deposited Organic Photodetectors Achieving NIR Detection — •Jakob Wolansky1,4, Jacob Hille1, Cedric Hoffmann2, Michel Panhans3, Frank Ortmann3, Natalie Banerji2, Karl Leo1, and Johannes Benduhn1,4 — 1IAPP, TU Dresden, Germany — 2DCBP, University Bern, Switzerland — 3NAT-School, TU Munich, Germany — 4DZA, Görlitz, Germany
Efficient charge separation in organic semiconductor devices typically relies on an energetic offset at the donor-acceptor interface to dissociate photogenerated electron-hole pairs. While such an offset facilitates charge generation, it can limit the maximum open-circuit voltage. Additionally, interfacial traps generate charge carriers in the dark. To address these limitations, significant research is exploring single-component (SC) architectures that minimize interfacial losses.
In this work, we investigate SC organic photodetectors in which a newly developed small molecule serves as the active layer. By chemically tuning the molecular structure, extended near-infrared absorption up to 900nm is achieved, while maintaining devices with a large linear dynamic range of 160dB, a -3dB cutoff frequency of 50kHz, and an external quantum efficiency of 20% at zero bias. Comparison with the widely studied small molecule DCV2-5T allows the extraction of structure-property relationships that serve as a basis for future molecular design. Furthermore, an in-depth analysis of the charge generation process in DCV2-5T provides new insights into the pathways governing efficient photogeneration in SC organic systems.
Keywords: organic photodetector; single-component; small molecule; ultrafast spectroscopy