SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 69: Poster: Solid-Liquid Interfaces
O 69.14: Poster
Mittwoch, 29. März 2023, 18:00–20:00, P2/EG
The interfacial (electronic) structure of InP(001) in contact with electrolytes studied via computational Reflection Anisotropy Spectroscopy — •Vibhav Yadav1, Margot Guidat1,2, Mario Löw2, Jongmin Kim1,2, Holger Euchner1, and Matthias M. May1,2 — 1Institute of Physical and Theoretical Chemistry, University of Tübingen — 2Institute of Theoretical Chemistry, University of Ulm, Germany
Controlling the electrochemical interface of III-V semiconductors is of great relevance for hydrogen production in Photoelectrochemical water splitting devices. Under operating conditions InP surfaces in contact with the electrolyte can undergo polymerization or dissolution, with the possible formation of In-O-In as charge recombination centers [1,2]. In this work, we vary the oxygen adatom coverage on In-rich and P-rich InP(001) surfaces using Density-functional Theory. Furthermore, we show that combining computational and experimental Reflection Anisotropy Spectroscopy has the potential to provide a better understanding of InP surfaces and their (electronic) structure under applied potentials. [1] May MM, Lewerenz HJ, Lackner D, Dimroth F. Hannappel T. Nat Commun 15, 2015, 9 (15), 8286. [2] Löw M, Guidat M, Kim J, May MM, RSC Adv. 2022, 12 (50), 32756.