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All-transfer Electrode Interface Engineering Towards Harsh-Environment-Resistant MoS 2 Field-Effect Transistors.

Yonghuang WuZeqin XinZhibin ZhangBolun WangRuixuan PengEnze WangRun ShiYiqun LiuJing GuoKaihui LiuKai Liu
Published in: Advanced materials (Deerfield Beach, Fla.) (2023)
Nanoscale electronic devices that can work in harsh environments are in high demand for wearable, automotive, and aerospace electronics. Clean and defect-free interfaces are of vital importance for building nanoscale harsh-environment-resistant devices. However, current nanoscale devices are subject to failure in these environments, especially at defective electrode-channel interfaces. Here, we develop harsh-environment-resistant MoS 2 transistors by engineering electrode-channel interfaces with an all-transfer of van der Waals electrodes. The delivered defect-free, graphene-buffered electrodes keep the electrode-channel interfaces intact and robust. As a result, the as-fabricated MoS 2 devices have reduced Schottky barrier heights, leading to a very large on-state current and high carrier mobility. More importantly, the defect-free, hydrophobic graphene buffer layer prevents metal diffusion from the electrodes to MoS 2 and the intercalation of water molecules at the electrode-MoS 2 interfaces. This enables high resistances of MoS 2 devices with all-transfer electrodes to various harsh environments, including humid, oxidizing, and high-temperature environments, surpassing the devices with other kinds of electrodes. Our work deepens the understanding of the roles of electrode-channel interfaces in nanoscale devices and provides a promising interface engineering strategy to build nanoscale harsh-environment-resistant devices. This article is protected by copyright. All rights reserved.
Keyphrases
  • carbon nanotubes
  • reduced graphene oxide
  • room temperature
  • solid state
  • quantum dots
  • atomic force microscopy
  • gold nanoparticles
  • highly efficient
  • transition metal
  • high temperature
  • high speed
  • aqueous solution