Electronic structure and molecular orientation of a Zn-tetra-phenyl porphyrin multilayer on Si(111)

TL;DR

This study investigates the electronic structure and molecular orientation of Zn-tetra-phenyl porphyrin multilayers on Si(111), revealing detailed spectral features crucial for understanding their electronic interactions in photovoltaic applications.

Contribution

First detailed analysis of electronic spectra and molecular orientation of Zn-tetra-phenyl porphyrins on Si(111) using synchrotron radiation.

Findings

Identified and assigned fine structures in HOMO and LUMO spectra.

Provided insights into orbital interactions and bond formation.

Enhanced understanding of electronic property evolution in porphyrin films.

Abstract

The electronic properties and the molecular orientation of Zn-tetraphenyl-porphyrin films deposited on Si(111) have been investigated using synchrotron radiation. For the first time we have revealed and assigned the fine structures in the electronic spectra related to the HOMOs and LUMOs states. This is particularly important in order to understand the orbital interactions, the bond formation and the evolution of the electronic properties with oxidation or reduction of the porphyrins in supramolecular donor-acceptor complexes used in photovoltaic devices.