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HL: Fachverband Halbleiterphysik
HL 75: Poster IIIB
HL 75.25: Poster
Donnerstag, 19. März 2020, 15:00–17:30, P2/3OG
Surface modification and charge carrier dynamics of materials and structures for semiconductor-based solar water splitting applications under operation conditions — •Elena Vedel1, Dani Olfa1, Mario Kurniawan2, Theo Pflug3, Sascha Kürth1, Noah Hill1, Shirly Espinoza4, Mateusz Rebarz4, Markus Olbrich3, Oliver Herrfurth5, Stefan Krischok1, Alexander Horn3, Jakob Andreasson4, Rüdiger Schmidt-Grund1, Andreas Bund2, and Thomas Hannappel1 — 1Institut für Physik, TU Ilmenau, Weimarer Straße 25, 98693 Ilmenau, Germany — 2Institut für Werkstofftechnik, TU Ilmenau, Weimarer Straße 25, 98693 Ilmenau, Germany — 3Laserinstitut Hochschule Mittweida, Technikumplatz 17, 09648 Mittweida, Germany — 4ELI Beamlines/Fyzikální ústav AV CR, v.v.i., Za Radnicí 835, 25241 Dolní Břežany, Czech Republic — 5Felix-Bloch-Institut für Festkörperphysik, Uni Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
We present investigations on InP-based materials and heterostructures for applications in photo-chemical water splitting by (fs-time resolved) spectroscopic ellipsometry and real-structure methods. i) We sensitively monitored the modification/corrosion of the semiconductor surfaces under operation in aqueous environment in dependence on the strength and duration of the photo-current flow. ii) The dynamics of the dielectric functions provides access on the dynamics of both, photoexcited electrons and holes in dependence on the carriers’ excess energy [1,2] as well as on their transport to the active interface.
[1] APL 115, 212103 (2019). [2] arXiv:org/abs/1902.05832v2 (2019).