Observation of Excitonic Rydberg States in Monolayer MoS2 and WS2 by Photoluminescence Excitation Spectroscopy.
basic_science · Level V
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- Record sourced from PubMed, PMID 25816155.
- Also identified by DOI 10.1021/nl504868p.
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Abstract
We have identified excited exciton states in monolayers of MoS2 and WS2 supported on fused silica by means of photoluminescence excitation spectroscopy. In monolayer WS2, the positions of the excited A exciton states imply an exciton binding energy of 0.32 eV. In monolayer MoS2, excited exciton transitions are observed at energies of 2.24 and 2.34 eV. Assigning these states to the B exciton Rydberg series yields an exciton binding energy of 0.44 eV.
Medical subject headings
- Disulfides
- Molybdenum
- Nanotechnology
- Tungsten Compounds