A5056338571- Molecular Junctions and Nanostructures
- Surface and Thin Film Phenomena
- Surface Chemistry and Catalysis
- Physics of Superconductivity and Magnetism
- Advanced Electron Microscopy Techniques and Applications
- Chalcogenide Semiconductor Thin Films
- Quantum and electron transport phenomena
- Electron and X-Ray Spectroscopy Techniques
- Gas Sensing Nanomaterials and Sensors
- Electronic Packaging and Soldering Technologies
- Stochastic processes and statistical mechanics
- Advanced Chemical Physics Studies
- Inorganic Fluorides and Related Compounds
- Advancements in Photolithography Techniques
- Theoretical and Computational Physics
- Graphene research and applications
- Semiconductor materials and interfaces
- Electronic and Structural Properties of Oxides
- Advanced Physical and Chemical Molecular Interactions
- 2D Materials and Applications
Helmholtz Institute Jena
2015-2019
Friedrich Schiller University Jena
2013-2019
We developed and implemented an algorithm to determine correct systematic distortions in low-energy electron diffraction (LEED) images. The procedure is principle independent of the design apparatus (spherical or planar phosphorescent screen vs. channeltron detector) therefore applicable all device variants, known as conventional LEED, micro-channel plate spot profile analysis LEED. essential prerequisite a calibration image sample with well-known structure suitably high number spots, e.g.,...
Alkali metal atoms are frequently used for simple yet efficient n-type doping of organic semiconductors and as an ingredient the recently discovered polycyclic aromatic hydrocarbon superconductors. However, incorporation dopants from gas phase into molecular crystal structures needs to be controlled well understood in order optimize electronic properties (charge carrier density mobility) target material. Here, we report that potassium intercalation pristine 3,4,9,10-perylenetetracarboxylic...
The current study generates profound atomistic insights into doping-induced changes of the optical and electronic properties prototypical PTCDA/Ag(111) interface. For doping K atoms are used, as KxPTCDA/Ag(111) has distinct advantage forming well-defined stoichiometric phases. To arrive at a conclusive, unambiguous, fully understanding interface properties, we combine state-of-the-art density-functional theory calculations with differential reflectance data, photoelectron spectra, X-ray...
In this contribution, we compare the optical absorbance behaviour and structural properties of lead(II)-phthalocyanine (PbPc) tin(II)-phthalocyanine (SnPc) thin films. To end, employ a Ag(1 1 1) substrate terminated with monolayer 3,4,9,10-perylene tetracarboxylic dianhydride constituting an internal interface whose main effect is electronic decoupling phthalocyanine adlayer from metal surface. As deduced low-energy electron diffraction scanning tunnelling microscopy (STM) measurements,...
The physical impact of thermal treatment applied to an organic material hosting alkali-metal atoms can be rather complex. Therefore, especially for ultrathin films, only little is known about annealing-induced effects on the molecular scale. In this work, we study annealing a model system consisting layers potassium-doped 3,4,9,10-perylene tetracarboxylic dianhydride (${\mathrm{K}}_{x}\mathrm{PTCDA}$) Ag(111) [C. Zwick et al., ACS Nano 10, 2365 (2016)]. We evidence three fundamental...