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research article
Field-induced charge separation dynamics in monolayer MoS2
2017
The absorption spectra of 2D semiconductors are dominated by excitons with binding energy of several hundreds of meV. Nevertheless, even single layers show an appreciable photovoltaic effect and work as the active material in high sensitivity photodetectors, thus indicating some degree of free charge carrier photogeneration. Here, we perform ultrafast transient absorption spectroscopy on monolayer MoS2 in a field-effect transistor configuration. We show that even a moderate in-plane electric field of a few kV cm(-1) can significantly increase the yield of charge carriers from photogenerated hot electron-hole pairs.
Type
research article
Web of Science ID
WOS:000406185800003
Authors
Vella, Daniele
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Viola, Daniele
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Kung, Yen C.
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Pogna, Eva A. A.
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Dal Conte, Stefano
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Vega-Mayoral, Victor
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Borzda, Tetiana
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Prijatelj, Matej
Publication date
2017
Publisher
Published in
Volume
4
Issue
3
Article Number
035017
Peer reviewed
REVIEWED
Written at
EPFL
EPFL units
Available on Infoscience
September 5, 2017
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