Electronic structure of an iron porphyrin derivative on Au(1 1 1). (14th December 2018)

• Record Type: Journal Article
• Authors: Stein, Arnulf; Rolf, Daniela; Lotze, Christian; Czekelius, Constantin; Franke, Katharina J; Tegeder, Petra
• Is Part Of: Journal of physics. Volume 31:Number 4(2019)
• Publication Date: 2018-12-14
• Subjects: organic/metal interface -- electronic structure -- transport gap -- optical gap -- exciton binding energy -- scanning tunneling spectroscopy -- two-photon photoemission; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aaf296
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Surface-bound porphyrins are promising candidates for molecular switches, electronics and spintronics. Here, we studied the structural and the electronic properties of Fe-tetra-pyridil-porphyrin adsorbed on Au(1 1 1) in the monolayer regime. We combined scanning tunneling microscopy/spectroscopy, ultraviolet photoemission, and two-photon photoemission to determine the energy levels of the frontier molecular orbitals. We also resolved an excitonic state with a binding energy of 420 meV, which allowed us to compare the electronic transport gap with the optical gap.