Berlin 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 80: Scanning Probe Microscopy: Light Matter Interaction at Atomic Scales II
O 80.5: Vortrag
Donnerstag, 21. März 2024, 11:30–11:45, MA 041
Electroluminescence of VOPc in different adsorption configurations — Vibhuti Rai1,2, •Lukas Gerhard2, Christof Holzer3, Carsten Rockstuhl3,4, and Wulf Wulfhekel2 — 1Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany — 2Institute for Quantum Materials and Technologies, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany — 3Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany — 4Institute for Nanotechnology, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
In the last few years, scanning tunneling microscopy (STM) induced luminescence has mostly focused on planar molecules absorbed in a flat configuration. The main component of the electric field in the STM junction, however, is oriented perpendicular to the substrate. Here we show electroluminescence of Vanadyl-phthalocyanine (VOPc) deposited on NaCl on Au(111) which exhibits a strong dipole component perpendicular to the surface and different adsorption configurations [1]. As the structural change of VOPc is related to the spin structure [2], this offers a possibility to explain the observed differences in the light emission pattern in terms of charge state, lifetime and efficiency.
[1] S. Debnath et al, Angewandte Chemie 2022, 61 (25). [2] K. Kaiser et al, ACS Nano 2019, 13 (6).
Keywords: STM; electroluminescence; VOPc; radical; triplett