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O: Fachverband Oberflächenphysik
O 15: Organic Molecules on Inorganic Substrates II: Electronic, Optical and other Properties
O 15.11: Talk
Monday, March 18, 2024, 17:30–17:45, MA 043
Electronic properties of N-heterocyclic carbenes and olefins on Si(111)√3×√3 R30∘-B — •Eva Glomski1, Milan Kubicki1, Mowpriya Das2, Ankita Das2, Robert Zielinski1, René Schöder1, Susi Lindner Franz1, Mike Thomas Nehring1, Mario Dähne1, Frank Glorius2, and Martin Franz1 — 1Technische Universität Berlin, Institut für Festkörperphysik, Berlin, Germany — 2Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Münster, Germany
Silicon is the most widely used semiconductor material in electronic devices and a modification or functionalization by organic overlayers is a promising approach to enhance their functionality. Recently, N-heterocyclic carbenes (NHCs) and olefins (NHOs) were found to be promising candidates for a modification of silicon surfaces [1,2]. In this work, the adsorption of NHCs and NHOs on the Si(111)(√3×√3)R30∘-B surface is investigated using synchrotron based high-resolution photoelectron spectroscopy allowing an in-depth study of the binding behavior and the electronic properties of the formed interfaces. Furthermore, the evolution of the band bending is investigated on the basis of Si 2p spectra revealing a different behavior for the studied NHCs and NHOs.
[1] M. Franz et al., Nat. Chem. 13, 828-835 (2021).
[2] M. Das et al., Angew. Chem. Int. Ed. 2023, e202314663.
Keywords: Silicon; N-heterocyclic carbenes; N-heterocyclic olefins; Photoelectron spectroscopy