To test whether the interaction involves the organic macrocycle, we analyzed the C1s region in more detail after CoPc or CoPcF16 deposition (Figure and, respectively, with fitting parameters and peak positions listed in Table , and a detailed description of the fitting procedure in the Supporting Information). Three chemically distinct carbons can be identified marked in the chemical structure shown in Figure . Those are the ones bound to nitrogen (C1), the neighboring carbon (C2) and the peripheral carbons bound either to hydrogen or fluorine atoms depending on the moiety under consideration (C3). We note a slight shift to higher binding energies of the CN components for multilayers vs. monolayers, indicating screening effects at the interface and/or a possible site-dependent redistribution of electrons. This might be a hint for a redistribution of electrons at the interface due to local interactions, but differences between the phthalocyanine monolayer in direct contact with the MoS2 surface and the thick film are minor. Similar results were obtained for the laboratory-source measurements, although the lower energy resolution causes a broadening of the Gaussian width (see Figure and Table , Supporting Information). On this basis, we can rule out hybridization in the context of an FCT. At the same time, these investigations suggest that the macrocycle has a small contribution to the formation of the IGS, and this is limited to the interface, specifically the first TPc monolayer.