The authors present a combined photoemission and scanning-tunneling spectroscopy study of the filled electronic states, the molecular energy gap, and the energy level diagram of highly ordered arrays of pentacene deposited on the Cu(119) vicinal surface. The states localized at the interface are clearly singled out, comparing the results at different pentacene thicknesses and with gas-phase photoemission data. The molecular gap of 2.35 eV, the hole injection barrier of 1.05 eV, and the electron injection barrier of 1.30 eV determine the energy level diagram of the states localized at the pentacene molecules.
Baldacchini, C., Mariani, C., Betti, M. G., Gavioli, L., Fanetti, M., Sancrotti, M., Molecular gap and energy level diagram for pentacene adsorbed on filled d-band metal surfaces, <<APPLIED PHYSICS LETTERS>>, 2006; (89): 152119-152121. [doi:10.1063/1.2359573] [http://hdl.handle.net/10807/18679]
Molecular gap and energy level diagram for pentacene adsorbed on filled d-band metal surfaces
Mariani, Carlo;Betti, Maria Grazia;Gavioli, Luca;Fanetti, Mattia;Sancrotti, Massimo
2006
Abstract
The authors present a combined photoemission and scanning-tunneling spectroscopy study of the filled electronic states, the molecular energy gap, and the energy level diagram of highly ordered arrays of pentacene deposited on the Cu(119) vicinal surface. The states localized at the interface are clearly singled out, comparing the results at different pentacene thicknesses and with gas-phase photoemission data. The molecular gap of 2.35 eV, the hole injection barrier of 1.05 eV, and the electron injection barrier of 1.30 eV determine the energy level diagram of the states localized at the pentacene molecules.
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