Ionization Energy and Energy Gap Structure of MoSI Molecular Wires: Kelvin Probe, Ultraviolet Photoelectron Spectroscopy, and Cyclic Voltammetry Measurements (CROSBI ID 270483)
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Strojnik, Martin ; Omerzu, Ales ; Majkić, Aleksej ; Mihailovic, Peter M. ; Lukan, Junos ; Bavdek, Gregor ; Bratina, Gvido ; Cvetko, Dean ; Topolovsek, Peter ; Mihailovic, Dragan
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Ionization Energy and Energy Gap Structure of MoSI Molecular Wires: Kelvin Probe, Ultraviolet Photoelectron Spectroscopy, and Cyclic Voltammetry Measurements
The work function W of Mo6S3I6 molecular nanowires is determined by Kelvin probe (KP) measurements, UV photoelectron spectroscopy (UPS), and cyclic voltammetry (CV). The values obtained by all three methods agree well, giving W = 4.8 +/- 0.1 eV. CV measurements also give a gap between the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of Eg = 1.2 +/- 0.1 eV, in agreement with recent optical measurements, but in disagreement with theoretical calculations, which predictict the materials to be a metal. The electronic structure of Mo6S3I6 suggests use of the material in applications such as bulk heterostructure photovoltaics and transparent electrodes and for molecular electronics devices.
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Povezanost rada
Fizika, Interdisciplinarne prirodne znanosti