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    Home > Chemicals Industry > New Chemical Materials > Hai I. Wang Research Group of Max Planck Institute of Polymer Research in Germany-Ultrasonic Wavelength Based on Pump Wavelength in Graphene/WS2 Heterostructure

    Hai I. Wang Research Group of Max Planck Institute of Polymer Research in Germany-Ultrasonic Wavelength Based on Pump Wavelength in Graphene/WS2 Heterostructure

    • Last Update: 2021-06-20
    • Source: Internet
    • Author: User
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    Article source: Graphene Magazine? Here, we investigate these processes in the graphene-WS2 heterostructure through complementary detection of the ultrafast terahertz optical conductivity in graphene and the transient absorption kinetics in WS2 after light excitation
    .
    We have observed that the separated charge lifetime in the heterostructure after CT is very long: more than 1 ns, while the charge separation reported in previous studies is only ~1, which leads to the stone ps
    .
    High efficiency photochemical of ink
    .
    In addition, for the CT process of the graphene-WS2 interface, we found that it is carried out by sub-exciton-excited photothermal electron emission and direct hole transfer from WS2 to the valence band of graphene during sub-exciton excitation
    .
    These findings provide insights for further optimizing the performance of optoelectronic devices, especially light detection
    .
    ? Fig.
    1.
    The dynamics of non-equilibrium hot carrier at the interface of g-WS2
    .
    ? Fig.
    2.
    Ultra-fast interface CT and long-life charge separation in graphene-WS2 vdW heterostructure
    .
    ? Fig.
    3.
    CT efficiency and mechanism of graphene-WS2 interface
    .
    ? Relevant research results were published in Science Advances (DOI: 10.
    1126/sciadv.
    abd9061) by the Hai I.
    Wang group of Max Planck Institute of Polymer Research in Germany in 2021
    .
    Original: Long-lived charge separation following pump-wavelength–dependent ultrafast charge transfer in graphene/WS2 heterostructures
    .
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