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O: Fachverband Oberflächenphysik
O 46: Poster Organic Molecules on Inorganic Substrates: Electronic, Optical and Other Properties
O 46.5: Poster
Dienstag, 18. März 2025, 18:00–20:00, P2
Excited state alignment of molecular orbitals on the ferroelectric WTe2 bulk crystal — •Jannis Leßmeister1, Ralf Hemm1, Joohyung Park2, Martin Aeschlimann1, Oliver L.A. Monti2, and Benjamin Stadtmüller3 — 1Rheinland-Pfälzische technische Universität Kaiserslautern-Landau and Research center OPTIMAS, Kaiserslautern, Germany — 2University of Arizona, Tucson, USA — 3Universität Augsburg, Augsburg, Germany
The interaction between organic molecules and ferroelectric domains on WTe2 offers a promising pathway for tuning the electronic properties of hybrid systems. WTe2, a layered transition metal dichalcogenide, exhibits ferroelectricity in its few-layer form due to broken inversion symmetry, resulting in switchable polarization domains. When organic molecules are deposited onto the surface, the local electronic environment created by these ferroelectric domains significantly influences molecular adsorption and electronic coupling.
Utilizing real- and momentum-space photoemission electron microscopy, we investigate how the ferroelectric properties of WTe2 modulate the alignment of excited state energy levels at the FePc/WTe2 interface. Our study elucidates the charge transfer behavior and interaction strength, exploring the role of local electric polarizations for tuning the energy level alignment in molecule-2D material heterostructures.
Keywords: ferroelectric; organic molecules; transition metal dichalcogenides; excited states; photoemission electron microscopy