Charge reorganization energy and small polaron binding energy of rubrene thin films by ultraviolet photoelectron spectroscopy

Abstract

The hole–phonon coupling of a rubrene monolayer on graphite is measured by means of angle resolved ultraviolet photoelectron spectroscopy. Thus, the charge reorganization energy λ and the small polaron binding energy is determined, which allows insight into the nature of charge transport in condensed rubrene.