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Room-Temperature Intercalation–Deintercalation Strategy Towards VO2(B) Single Layers with Atomic Thickness

Authors

  • Liang Liu,

    1. Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, PR China
    Current affiliation:
    1. L.L. and T.Y. contributed equally to this work.
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  • Tao Yao,

    1. Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, PR China
    Current affiliation:
    1. L.L. and T.Y. contributed equally to this work.
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  • Xiaogang Tan,

    1. Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, PR China
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  • Qinghua Liu,

    1. Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, PR China
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  • Zhiqiang Wang,

    1. Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, PR China
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  • Dacheng Shen,

    1. Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, PR China
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  • Zhihu Sun,

    1. Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, PR China
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  • Shiqiang Wei,

    Corresponding author
    1. Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, PR China
    • Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, PR China
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  • Yi Xie

    Corresponding author
    1. Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, PR China
    • Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, PR China.
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Abstract

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Exfoliation of layered bulk VO2(B) with strong covalent bonding by a convenient room-temperature intercalation-deintercalation strategy is proposed to obtain ultrathin sheets with atomic thickness of ∼0.62 nm. This VO2(B) single layer possesses a more symmetric atomic structure with slight lattice expansion that widens the band gap Energy by ΔEg = 0.19 eV, providing more possibilities for energy-level engineering in photovoltaics.

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