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Nano Research

, Volume 11, Issue 9, pp 4923–4930 | Cite as

Abnormal n-type doping effect in nitrogen-doped tungsten diselenide prepared by moderate ammonia plasma treatment

  • Zhepeng Jin
  • Zhi Cai
  • Xiaosong Chen
  • Dacheng Wei
Research Article
  • 133 Downloads

Abstract

To facilitate potential applications of tungsten diselenide (WSe2) in electronics, controllable doping is of great importance. As an industrially compatible technology, plasma treatment has been used to dope two-dimensional (2D) materials. However, owing to the strong etching effect in transition metal dichalcogenides (TMDCs), it is difficult to controllably dope 2D WSe2 crystals by plasma. Herein, we develop a moderate ammonia plasma treatment method to prepare nitrogen-doped WSe2 with controlled nitrogen content. Interestingly, Raman, photoluminescence, X-ray photoelectron spectroscopy, and electrical measurements reveal abnormal n-doping behavior of nitrogen-doped WSe2, which is attributed to selenium anion vacancy introduced by hydrogen species in ammonia plasma. Nitrogen-doped WSe2 with abnormal n-doping behavior has potential applications in future TMDCs-based electronics.

Keywords

nitrogen-doped tungsten diselenide n-type doping ammonia plasma anion vacancy 

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Notes

Acknowledgements

This work was supported by National Program for Thousand Young Talents of China, the National Natural Science Foundation of China (Nos. 51773041, 21603038 and 21544001), Shanghai Committee of Science and Technology in China (No. 18ZR1404900), and Fudan University.

Supplementary material

12274_2018_2087_MOESM1_ESM.pdf (1.7 mb)
Abnormal n-type doping effect in nitrogen-doped tungsten diselenide prepared by moderate ammonia plasma treatment

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Copyright information

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Zhepeng Jin
    • 1
  • Zhi Cai
    • 1
  • Xiaosong Chen
    • 1
  • Dacheng Wei
    • 1
  1. 1.State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular ScienceFudan UniversityShanghaiChina

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