Torsten Fritz is professor and chair of Applied Physics / Solid State Physics at the Institute of Solid State Physics (IFK) at the FSU Jena. His research group is engaged in the research on nanostructures, surfaces, and thin films of both organic and inorganic semiconductor materials, with emphasis on 2D materials. The group has a network of theoretical and experimental collaborators in Germany, Austria, USA, and Japan. Our main research interest lies in the discovery of structure-property-relations of structurally well-defined ultrathin epitaxial layers, organic quantum wells, K-doped organic super conductors, and modern 2D materials (epitaxial graphene, transition metal dichalcogenides). The main target of our research is the development of basic principles for the use of optoelectronic nano materials in prospective devices.
Our in situ optical spectroscopy, namely differential reflectance spectroscopy (DRS), is used to study ultrathin films (effective film thickness down to 0.03 nm) organic (sub-)monolayers and heterostructures in terms of absorption spectroscopy to analyze the optical interaction between either the molecules itself, organic adsorbates and inorganic substrates, or molecules and dopants. For the analyses of the chemical composition and bonding at surfaces and in thin films we use surface analysis methods like photoelectron spectroscopy (XPS, ARUPS) and Auger electron spectroscopy (AES). The crystalline structure can be determined by electron diffraction (LEED, RHEED, XPD). Scanning tunneling microscopy (STM) and atomic force microscopy (AFM) at ultra-low temperatures (T = 1.1 K) are used for high-resolution imaging of nanostructures and surfaces.
The surface science group of Prof. Fritz is involved in the research of organic molecules which in the form of thin films possess semiconducting properties. We specialize in the preparation and characterization of highly ordered (epitaxial) layers on singlecrystalline substrates in ultra-high vacuum, placing emphasis on the structure-property-relations. Further research topics include 2D-materials (epitaxial graphene, hexagonal boron nitride (h-BN), transition metal dichalcogenides) and organic
superconductors. The diversity of complementary experimental methods (optical spectroscopy, photoelectron spectroscopy, electron diffraction, scanning probe microscopy at 1.2 K, and many more) is a key aspect of this group.
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 M. Meissner et al., ACS Nano 10, 6474 (2016).
 R. Forker et al., Phys. Rev. B 93, 165426 (2016).
 R. Forker et al., Soft Matter 13, 1748 (2017).
 T. Kirchhuebel et al., Phys. Chem. Chem. Phys. 21, 12730 (2019).