have shown by angle-resolved photoelectron spectroscopy that the adsorption of perfluorinated cobalt-phthalocyanine (CoPcF16) on bulk n-type MoS2 restores an intrinsic position of the Fermi level, indicating that trap states near the conduction band edge could be compensated by the adlayer. This action was accompanied by the appearance of a new gap state near the Fermi level, which was strongly confined to the interface (Figure ). In contrast, the fluorine-free analogue CoPc did not induce a new gap state but increased the degree of n-doping in the heterostructure.