Journal article

Vacuum ultraviolet excitation luminescence spectroscopy of few-layered MoS 2

  • Pankratov, V Research Centre for Molecular Materials, University of Oulu, Finland -
  • Hoszowska, Joanna Department of Physics, University of Fribourg, Switzerland -
  • Dousse, Jean-Claude Department of Physics, University of Fribourg, Switzerland
  • Huttula, M Research Centre for Molecular Materials, University of Oulu, Finland
  • Kis, A Electrical Engineering Institute, École Polytechnique Fédérale de Lausanne (EPFL), Switzerland
  • Krasnozhon, D Electrical Engineering Institute, École Polytechnique Fédérale de Lausanne (EPFL), Switzerland
  • Zhang, M Department of Physics, East China University of Science and Technology, Shanghai, China
  • Cao, Wei Research Centre for Molecular Materials, University of Oulu, Finland
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    09.12.2015
Published in:
  • Journal of Physics: Condensed Matter. - 2016, vol. 28, no. 1, p. 015301
English We report on vacuum ultraviolet (VUV) excited photoluminescence (PL) spectra emitted from a chemical vapor deposited MoS₂ few-layered film. The excitation spectrum was recorded by monitoring intensities of PL spectra at ~1.9 eV. A strong wide excitation band peaking at 7 eV was found in the excitation. The PL excitation band is most intensive at liquid helium temperature and completely quenched at 100 K. Through first-principles calculations of photoabsorption in MoS₂, the excitation was explicated and attributed to transitions of electrons from p- and d- type states in the valence band to the d- and p-type states in the conduction band. The obtained photon-in/photon-out results clarify the excitation and emission behavior of the low dimensional MoS₂ when interacting with the VUV light sources.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/304903
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