Aufsatz in einer Fachzeitschrift

Charge trapping and coalescence dynamics in few layer MoS2



Details zur Publikation
Autor(inn)en:
Vega-Mayoral, V.; Borzda, T.; Vella, D.; Prijatelj, M.; Pogna, E.; Coleman, J.; Backes, C.; Cerullo, G.; Mihailovic, D.; Gadermaier, C.
Verlag:
IOP PUBLISHING LTD

Publikationsjahr:
2018
Zeitschrift:
2D Materials
Seitenbereich:
015011
Jahrgang/Band :
5
Heftnummer:
1
Seitenumfang:
8
ISSN:
2053-1583
DOI-Link der Erstveröffentlichung:


Zusammenfassung, Abstract
The optoelectronic properties of a material are determined by the processes following light-matter interaction. Here we use femtosecond optical spectroscopy to systematically study photoexcited carrier relaxation in few-layer MoS2 flakes as a function of excitation density and sample thickness. We find bimolecular coalescence of charges into indirect excitons as the dominant relaxation process in two-to three-layer flakes while thicker flakes show a much higher density of defects, which efficiently trap charges before they can coalesce.


Schlagwörter
femtosecond dynamics, liquid phase exfoliation, molybdenum disulfide, pump-probe, transition metal dichalcogenides, traps


Autor(inn)en / Herausgeber(innen)

Zuletzt aktualisiert 2022-20-04 um 14:50