The same ARPES measurements also reveal details about the electronic properties of the deposited molecular monolayers. For CoPc (Figure ), we locate the HOMO (Highest Occupied Molecular Orbital) maximum at around 0.9 eV and the on-set at around 0.6 eV, e.g. slightly above the energy of the VBM of MoS2. As expected for phthalocyanines, we find an intensity variation depending on the angle of emitted electrons with the highest state density around 1.5 -1.7 Å -1 , 51-53 that is, in the vicinity of the K-and M-point of MoS2 visible in the momentum maps at 0.8 eV shown in Figure . We note that for thicker CoPc films, the HOMO maximum is found at 1.05 eV (Figure ) and the on-set at around 0.75 eV. A possible reason might be that screening effects at the interface occur in both the MoS2 and the CoPc, which has also been observed for phthalocyanines on metal substrates. When fitting the HOMO peaks of the monolayer and thicker CoPc films with an Gaussian function we find two different full width half maxima (FWHM) of 0.36 and 0.4 eV respectively. Those differences can be explained by an inhomogeneous film growth but also by molecule-molecule interactions, which also cause energetic shifts of the HOMO. For CoPcF16 (Figure ), we locate the HOMO maximum at around 0.8 eV with the highest state density again near the K-and M-points (see momentum map in Figure ), an on-set at 0.65 eV (Figure ) and a FWHM of 0.3 eV. Different from CoPc, an additional, more diffuse state emerges near the Γ point with its maximum at 0.35 eV and an on-set close to the Fermi level at 0.1 eV (see also Figure and Figure , Supporting Information). For thicker molecular films, this state disappears, the HOMO maximum shifts to 1.11 eV with an on-set at 0.6 eV, and the FWHM broadens to 0.55 eV. Thus, the effects displayed in Figure are confined to the interface.