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Ultrafast charge dynamics in dispersions of monolayer MoS2 nanosheets

Kime, G; Leontiadou, M; Brent, JR; Savjani, N; O'Brien, P; Binks, D


G Kime

JR Brent

N Savjani

P O'Brien

D Binks


Ultrafast charge dynamics in dispersions of MoS2 nanosheets in N-methyl-2-pyrrolidone are reported. Samples were prepared by the ultrasonication-assisted exfoliation of MoS2 powder, resulting in nanosheets that were predominantly monolayer and had an average sheet size of 32.4 ± 0.1 nm. These dispersions were characterized using absorption and photoluminescence spectroscopy, transient photoluminescence measurements, and atomic force microscopy before the ultrafast charge dynamics were studied via transient absorption spectroscopy. The transient absorption spectra exhibited bleach peaks and photoinduced absorption peaks in spectral regions corresponding to both the A and B excitons of MoS2. The growth and decay of the features in the B exciton region were determined largely by the dynamics of the exciton population, while the features in the A exciton region depend on the dynamics of both excitons and trions.


Kime, G., Leontiadou, M., Brent, J., Savjani, N., O'Brien, P., & Binks, D. (2017). Ultrafast charge dynamics in dispersions of monolayer MoS2 nanosheets. Journal of Physical Chemistry C, 121, 22415-22421.

Journal Article Type Article
Online Publication Date Sep 18, 2017
Publication Date Sep 18, 2017
Deposit Date Apr 1, 2019
Journal Journal of Physical Chemistry C
Print ISSN 1932-7447
Publisher American Chemical Society
Volume 121
Pages 22415-22421
Publisher URL
Related Public URLs
Additional Information Funders : Engineering and Physical Sciences Research Council (EPSRC)
Grant Number: EP/K008544/1
Grant Number: EP/L01548X/1