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Influence of interlayer interactions on the relaxation dynamics of excitons in ultrathin MoS2

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Abstract

Interlayer interactions play a crucial role in modifying the optical and electronic properties of layered materials in a complex way, which is of key importance for the performance of the optoelectronic devices based on these novel materials. In this contribution, we performed an investigation into the underlying influence of interlayer interactions on the relaxation dynamics of excitons in ultrathin MoS2 using the femtosecond transient absorption spectroscopy technique. The experimental results manifest that interlayer interactions in bilayer MoS2 can largely facilitate the exciton–phonon scattering process and inhibit the radiative recombination process, which consequently accelerates the relaxation rate of A excitons and results in the decrease of the relaxation lifetime of A excitons in bilayer MoS2.

Graphical abstract: Influence of interlayer interactions on the relaxation dynamics of excitons in ultrathin MoS2

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Publication details

The article was received on 12 Jul 2018, accepted on 17 Dec 2018 and first published on 17 Dec 2018


Article type: Paper
DOI: 10.1039/C8NA00086G
Citation: Nanoscale Adv., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
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    Influence of interlayer interactions on the relaxation dynamics of excitons in ultrathin MoS2

    D. Lu, Q. Zhou, F. Li, X. Li and G. Lu, Nanoscale Adv., 2019, Advance Article , DOI: 10.1039/C8NA00086G

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