Interplay of Adsorption Geometry and Work Function Evolution at the TCNE/Cu(111) Interface.

ABSTRACT: The adsorption of organic electron acceptors on metal surfaces is a powerful way to change the effective work function of the substrate through the formation of charge-transfer-induced dipoles. The work function of the interfaces is hence controlled by the redistribution of charges upon adsorption of the organic layer, which depends not only on the electron affinity of the organic material but also on the adsorption geometry. As shown in this work, the latter dependence controls the work function also in the case of adsorbate layers exhibiting a mixture of various adsorption geometries. Based on a combined experimental (core-level and infrared spectroscopy) and theoretical (density functional theory) study for tetracyanoethylene (TCNE) on Cu(111), we find that TCNE adsorbs in at least thre

SUBMITTER: Niederreiter M 

PROVIDER: S-EPMC10749461 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature