Journal of the Korean Physical Society

, Volume 72, Issue 10, pp 1203–1208 | Cite as

Effects of Electron Beam Irradiation and Thiol Molecule Treatment on the Properties of MoS2 Field Effect Transistors

  • Barbara Yuri Choi
  • Kyungjune Cho
  • Jinsu Pak
  • Tae-Young Kim
  • Jae-Keun Kim
  • Jiwon Shin
  • Junseok Seo
  • Seungjun Chung
  • Takhee LeeEmail author


We investigated the effects of the structural defects intentionally created by electron-beam irradiation with an energy of 30 keV on the electrical properties of monolayer MoS2 field effect transistors (FETs). We observed that the created defects by electron beam irradiation on the MoS2 surface working as trap sites deteriorated the carrier mobility and carrier concentration with increasing the subthreshold swing value and shifting the threshold voltage in MoS2 FETs. The electrical properties of electron-beam irradiated MoS2 FETs were slightly improved by treating the devices with thiol-terminated molecules which presumably passivated the structural defects of MoS2. The results of this study may enhance the understanding of the electrical properties of MoS2 FETs in terms of creating and passivating defect sites.


Molybdenum disulfide Electron beam irradiation Chemical treatment Electrical properties 


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Copyright information

© The Korean Physical Society 2018

Authors and Affiliations

  • Barbara Yuri Choi
    • 1
  • Kyungjune Cho
    • 1
  • Jinsu Pak
    • 1
  • Tae-Young Kim
    • 1
  • Jae-Keun Kim
    • 1
  • Jiwon Shin
    • 1
  • Junseok Seo
    • 1
  • Seungjun Chung
    • 1
  • Takhee Lee
    • 1
    Email author
  1. 1.Department of Physics and Astronomy, and Institute of Applied PhysicsSeoul National UniversitySeoulKorea

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