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Surface functionalization of WSe 2 by F 16 CoPc
Author(s) -
Rückerl Florian,
Klaproth Tom,
Schuster Roman,
Büchner Bernd,
Knupfer Martin
Publication year - 2017
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201600656
Subject(s) - surface modification , phthalocyanine , charge (physics) , surface (topology) , materials science , photoemission spectroscopy , cobalt , x ray photoelectron spectroscopy , surface charge , spectroscopy , chemical physics , analytical chemistry (journal) , chemistry , nanotechnology , physics , organic chemistry , nuclear magnetic resonance , metallurgy , geometry , mathematics , quantum mechanics
We have investigated the electronic properties of WSe 2 surfaces covered by fluorinated cobalt phthalocyanine (F 16 CoPc) using photoemission spectroscopy. We show that a charge transfer occurs at this interface, which results in the creation of holes in the WSe 2 surface while the Co center of the phthalocyanine is reduced to Co(I). We observe a potential change in WSe 2 approaching the surface as a consequence of the induced positive charges near the surface. In addition, our data allow for a rough estimation of the induced charge density and suggest that the holes might be localized.