Electronic Properties of the Interfaces Between the Wide Bandgap Organic Semiconductor para-Sexiphenyl and Samarium

摘要

Ultraviolet photoelectron spectroscopy was used to determine the energy level alignment at the interfaces formed by either the deposition of para-sexiphenyl (6P) onto samarium thin films, or by growing samarium on 6P films. We find that for both cases (6P on Sm, and Sm on 6P) the interaction at the interface is weak (physisorption), and the interfacial dipole is smaller than 0.2 eV.