Atomic structure and electronic properties of interfaces formed by perovskite and organic charge transfer materials
Final Report Abstract
Within the project, thin films of organic molecules on the surfaces of the semiconductors SrTiO3 and silicon were investigated. The focus was thereby on the preparation and investigation of the pure SrTiO3(100) surface, the growth of phthalocyanine films of varying thickness on the investigated surfaces, and the investigation of their structural and electronic properties. As methods mainly scanning tunneling microscopy (STM) and spectroscopy (STS), X-ray photoelectron spectroscopy (XPS), and low-energy electron diffraction (LEED) were used. The SrTiO3(100) surface was prepared by annealing under ultra-high vacuum conditions. Depending on the heating procedure, different surface structures are formed. Here, a previously not described structure was discovered. The growth of organic films was investigated on the SrTiO3(100)(√5×√5)R26.6° surface, the Si(111)(√3×√3)R30°-B surface (Si:B), and the Si(111)(4×1)-In surface. For cobalt phthalocyanine (CoPc) molecules on Si:B, it was shown that the growth behavior changes with coverage. At low coverages, the molecules adsorb flat-lying on the surface, forming a chemical bond. The hybridization states could be detected by STS and XPS. At higher coverages, however, the electronic properties of the films resemble those of pure CoPc crystals. on the metallic Si(111)(4×1)-In, the growth of highly ordered CoPc monolayers was demonstrate.
Publications
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(invited talk). Scanning Tunneling Microscopy Applied to Semiconductor Surfaces. GraFOx Summer School on Oxide Semiconductors for Smart Electronic Devices, Menaggio, Italy (2019)
S. Lindner
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Arrangement and electronic properties of cobalt phthalocyanine molecules on B-Si(111)- √(3)×√(3) R30^(∘). Physical Review B, 100(24).
Lindner, Susi; Franz, Martin; Kubicki, Milan; Appelfeller, Stephan; Dähne, Mario & Eisele, Holger
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Molecular arrangement and electronic properties of CoPc on B-passivated Si(111). The 17th International Conference on the Formation of Semiconductor Interfaces (ICFSI- 17), Shanghai, China (2019)
S. Lindner, M. Franz, M. Kubicki, S. Appelfeller, M. Dähne & H. Eisele
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Adsorption behavior of cobalt phthalocyanine submonolayer coverages on B-Si(111)-3×3R30°. Journal of Vacuum Science & Technology B, 38(4).
Kubicki, Milan; Lindner, Susi; Franz, Martin; Eisele, Holger & Dähne, Mario
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Arrangement and electronic properties of cobalt phthalocyanine molecules on B-Si(111)- (√3×√3)R30°. 47th Conference on the Physics and Chemistry of Surfaces and Interfaces (PCSI-47), Boulder, USA (2020)
S. Lindner, M. Franz, M. Kubicki, S. Appelfeller, M. Dähne & H. Eisele
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Electronic structure of the Si(111)√(3)×√(3)R30^(∘)−B surface from theory and photoemission spectroscopy. Physical Review B, 103(3).
Aldahhak, Hazem; Hogan, Conor; Lindner, Susi; Appelfeller, Stephan; Eisele, Holger; Schmidt, Wolf Gero; Dähne, Mario; Gerstmann, Uwe & Franz, Martin
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Growth of ordered two-dimensional cobalt phthalocyanine films on a one-dimensional substrate. Applied Physics Letters, 119(13).
Kubicki, Milan; Lindner-Franz, Susi; Dähne, Mario & Franz, Martin
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Arrangement and electronic properties of cobalt phthalocyanine molecules on B-Si(111)- (√3×√3)R30°. 48th Conference on the Physics and Chemistry of Surfaces and Interfaces (PCSI-48), Redondo Beach, USA (2023)
S. Lindner-Franz, M. Franz, M. Kubicki, S. Appelfeller, M. Dähne & H. Eisele
