Regensburg 2025 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 13: Poster
DS 13.19: Poster
Donnerstag, 20. März 2025, 18:00–20:00, P1
In-Situ XAS study of ZnO and Mn-ZnO thin films — •Sulaiman Al Salem1,2, Sreeju Sreekantan Nair Lalithambika12, Shagun Thakur3, Simone Techert1,2,3, and Christian Jooss3 — 1Institute of X-ray Physics, University of Göttingen, 37077 Germany — 2Structural Dynamics in Chemical Systems, Deutsches Elektronen-Synchrotron, DESY, Notkestrasse 85, D-22607, Hamburg, Germany — 3Institute of Materials Physics, University of Göttingen, 37077 Germany
High-performance catalysts with low overpotential for oxygen evolution reaction (OER) are critical for green energy transition. Transition metal-doped ZnO thin films make it a promising catalyst for efficient OER. Understanding the electronic properties of such materials in a catalytically relevant environment is crucial for tailoring and tuning these materials for OER applications. X-ray Absorption Spectroscopy (XAS) is a powerful spectroscopic technique that is element-selective and environment-sensitive. We present an investigation into the electronic structure of Zinc Oxide (ZnO) and Mn-doped thin films using XAS at the Oxygen K-edge as well as the Zn and Mn L-edges. The XAS spectra, which serve as the basis for further investigation upon Mn-doping, show the characteristic peaks of the elements present in the films. Besides, soft x-ray XAS spectra at in-situ ZnO and Mn-doped ZnO - water interface conditions were measured further to study the electronic structure at catalytically relevant conditions.
Keywords: xas spectroscopy; zno; thin films; electronic structure; in-situ