Monolayer and bilayer perfluoropentacene on Cu(111)

Abstract

Perfluoropentacene (PFP), an $n$-type organic semiconductor, is deposited at monolayer and bilayer coverage on Cu(111). Scanning tunneling microscopy at various bias voltages is used to investigate the geometric and electronic structure of the layer. The appearances of the first layer and second layer differ, probably because of perturbation to the first layer electronic structure by the substrate. This has been previously observed for pentacene (Pn), the isostructural $p$-type organic semiconductor. The PFP film has a unit cell of (4 -3,3 4) relative to the substrate, which is larger than that of Pn/Cu(111), representing a half-integer increment in each direction.

References in corpus (5)

• Photoluminescence spectroscopy of pure pentacene, perfluoropentacene and mixed thin films
• Monolayer and bilayer pentacene on Cu(111)
• Changes in adsorption heights upon self-assembly of bicomponent supramolecular networks
• Large spatially-resolved rectification in a donor-acceptor molecular heterojunction
• Molecular Packing Motifs Determine Charge-Transfer and Carrier Dynamics in Molecular Heterosystems: the Case of Pentacene - Perfluoropentacene