Field emission from geometrically modulated tungsten-nickel sulfide / graphitic carbon nanobelts on Si microchannel plates

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Dajun Wu
  • Yuyao Chen
  • Xuekun Hong
  • Lianwei Wang
  • Wei Ou-Yang
  • Shi Tao
  • Quanliang Zhao
  • Bin Qian

Detail(s)

Original languageEnglish
Pages (from-to)4034-4042
Journal / PublicationCeramics International
Volume47
Issue number3
Online published1 Oct 2020
Publication statusPublished - 1 Feb 2021

Abstract

The low efficiency and instability of electron emission from two-dimensional (2D) materials such as WS2 and NiS hamper application to vacuum microelectronic devices. Although nickel-based alloys have many favorable physicochemical properties suitable for nanoelectronics, electron field emission (FE) from heterostructures comprising tungsten-nickel sulfide alloys and graphite carbon (WNi–S/C) has been seldom studied because it is difficult to fabricate the nanostructures in situ. In this work, field emitters composed of the WNi–S/C nanobelt composite are produced on Si microchannel plates (WNi–S/C@Si) hydrothermally. The structure has a porous and vertically aligned 3D morphology in addition to excellent adhesion strength with the substrate. Geometrical modulation of the WNi–S/C@Si is performed by changing the hydrothermal reaction temperature and an ultralow turn-on electric field of 0.51 V μm−1 for a current density 0.1 mA cm−2, threshold electric field of 0.65 V μm−1 for a current density of 1 mA cm−2, and stability of 97.1% for 8 h are accomplished. The related mechanisms are investigated and discussed. Moreover, finite element simulation shows that not only the shape of the nanostructures but also the high aspect plays a key role in reducing screen effects. These outstanding properties suggest large potential in high-performance FE and vacuum nanodevices.

Research Area(s)

  • Field emission, Graphitic carbon, Nanobelts, Si microchannel plates, Tungsten-nickel sulfide

Citation Format(s)

Field emission from geometrically modulated tungsten-nickel sulfide / graphitic carbon nanobelts on Si microchannel plates. / Wu, Dajun; Chen, Yuyao; Hong, Xuekun; Wang, Lianwei; Ou-Yang, Wei; Tao, Shi; Zhao, Quanliang; Qian, Bin; Chu, Paul K.

In: Ceramics International, Vol. 47, No. 3, 01.02.2021, p. 4034-4042.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review