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HL: Fachverband Halbleiterphysik

HL 13: Heterostructures, Interfaces and Surfaces

HL 13.2: Vortrag

Montag, 17. März 2025, 17:00–17:15, H17

Understanding local charge transfer processes in nanostructured photosystems — •Nina Miller, Sven Doll, Sergej Levashov, Lukas Wolz, Matthias Kuhl, and Johanna Eichhorn — Physics Department, School of Natural Sciences, Technical University of Munich, Am Coulombwall 4, 85748 Garching, Germany

Photoelectrochemical energy conversion offers a promising approach for directly converting solar energy into storable chemical fuels. For scalability, photoelectrodes are often fabricated using thin film technologies yielding material architectures with complex micro- and nanoscale structures. One challenge in this context is that the characteristics of these nanostructured material architectures often deviate from the properties of idealized model systems. To understand energy conversion processes at surfaces and interfaces of nanostructured material systems, novel atomic force microscopy methods have emerged recently, such as AFM-based scanning electrochemical microscopy, to resolve local chemical transformations, charge transport, and material changes under operation conditions. By correlating nanoscale and macroscale properties, we will establish the link between nanoscale processes and macroscopic performance, advancing the design of efficient semiconductor/catalyst systems for PEC applications.

Keywords: semiconductor; atomic force microscopy; photoelectrochemistry; catalyst; water splitting