A5026593462- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Advancements in Solid Oxide Fuel Cells
- Machine Learning in Materials Science
- Electronic and Structural Properties of Oxides
- Advanced Materials Characterization Techniques
- Ga2O3 and related materials
- Hydrogen embrittlement and corrosion behaviors in metals
- Transition Metal Oxide Nanomaterials
- Electron and X-Ray Spectroscopy Techniques
Technical University of Darmstadt
2019-2023
Abstract Chemical substitution, which can be iso- or heterovalent, is the primary strategy to tailor material properties. There are various ways how a react substitution. Isovalent substitution changes density of states while heterovalent i.e. doping, induce electronic compensation, ionic valence cations anions, result in segregation neutralization dopant. While all these can, principle, occur simultaneously, it often desirable select certain mechanism order determine Being able predict and...
The interaction of BiFeO3 and Co-doped thin-film surfaces with water vapor is examined using photoelectron spectroscopy. Water exposure results in an upward shift the Fermi energy, which limited by reduction Bi Fe undoped Co oxidized BiFeO3. highlight importance surface potential changes induced solid ability spectroscopy to quantitatively determine electrochemical potentials defect energy levels.
The energy of the valence band maximum ${\mathrm{NaNbO}}_{3}$ is determined from Schottky barrier heights at contacts with low work function Sn-doped ${\mathrm{In}}_{2}{\mathrm{O}}_{3}$ and high ${\mathrm{RuO}}_{2}$ by means x-ray photoelectron spectroscopy in situ interface preparation. measurements reveal a valence-band edge energy, which comparable to that ${\mathrm{SrTiO}}_{3}$ ${\mathrm{BaTiO}}_{3}$. gap ${\mathrm{BaTiO}}_{3}$ $3.2\phantom{\rule{0.16em}{0ex}}\mathrm{eV}$ values...