Electron Irradiation Effects on Single‐Layer MoS2 Obtained by Gold‐Assisted Exfoliation

Electron Irradiation Effects on Single‐Layer MoS2 Obtained by Gold‐Assisted Exfoliation

Mechanical exfoliation assisted by gold is applied to obtain good quality large lateral size single‐layer MoS2. The effects of 2.5 MeV electron irradiation are investigated at room temperature on structural and electronic features by Raman and microluminescence spectroscopy. The exciton recombinatio...

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Veröffentlicht in:Physica status solidi. A, Applications and materials science Applications and materials science, 2022-11, Vol.219 (21), p.n/a
Hauptverfasser: Panasci, Salvatore Ethan, Alessi, Antonino, Buscarino, Gianpiero, Cannas, Marco, Gelardi, Franco Mario, Schilirò, Emanuela, Giannazzo, Filippo, Agnello, Simonpietro
Format: Artikel
Sprache:eng
Schlagworte:
Electron irradiation
Excitation spectra
Excitons
Exfoliation
Gold
gold-assisted exfoliation
irradiation effects
Molybdenum disulfide
MoS2
Point defects
Raman spectra
Room temperature
single layers
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Zusammenfassung:Mechanical exfoliation assisted by gold is applied to obtain good quality large lateral size single‐layer MoS2. The effects of 2.5 MeV electron irradiation are investigated at room temperature on structural and electronic features by Raman and microluminescence spectroscopy. The exciton recombination emission in the direct bandgap of single‐layer MoS2 is affected during irradiation starting from the minimum explored dose of 1 kGy. At higher doses, Raman bands show no relevant modifications whereas the exciton emission is quenched, suggesting that irradiation‐induced point defects affect exciton dynamics. β‐ray irradiation affects the exciton emission of single‐layer MoS2 through point defects induction.
ISSN:1862-6300
1862-6319
DOI:10.1002/pssa.202200096