Real-space structure and electronic structure of grain boundaries in perovskites (B06)

• Subject Area: Physical Chemistry of Solids and Surfaces, Material Characterisation
• Term: since 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 463184206

Project B06 develops an improved experimental understanding of grain boundaries in perovskites, in terms of their structure and chemistry at the atomic and nanometer scale, their electronic structure, local Fermi level and space charge layers, which are related to modelling of grain boundaries in the theory projects. State-of-the-art analytical (S)TEM techniques and to-be-developed 4D-STEM based approaches are employed to characterize (doped) BaTiO3 polycrystals and bicrystals. Furthermore, in situ (S)TEM experiments are used to correlate GB structure and chemistry with thermally induced segregation and, in turn, to determine how these changes affect the vicinity of the GB and grain growth.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1548: FLAIR - Fermi Level Engineering Applied to Oxide Electroceramics
• Applicant Institution: Technische Universität Darmstadt
• Project Head: Professor Dr. Christian Kübel