Tunable band gaps and p-type transport properties of boron-doped graphenes by controllable ion doping using reactive microwave plasma

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

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Author(s)

  • Yong-Bing Tang
  • Li-Chang Yin
  • Yang Yang
  • Xiang-Hui Bo
  • Yu-Lin Cao
  • Hong-En Wang
  • Igor Bello
  • Shuit-Tong Lee
  • Hui-Ming Cheng

Detail(s)

Original languageEnglish
Pages (from-to)1970-1978
Journal / PublicationACS Nano
Volume6
Issue number3
Publication statusPublished - 27 Mar 2012

Abstract

We report tunable band gaps and transport properties of B-doped graphenes that were achieved via controllable doping through reaction with the ion atmosphere of trimethylboron decomposed by microwave plasma. Both electron energy loss spectroscopy and X-ray photoemission spectroscopy analyses of the graphene reacted with ion atmosphere showed that B atoms are substitutionally incorporated into graphenes without segregation of B domains. The B content was adjusted over a range of 0-13.85 atom % by controlling the ion reaction time, from which the doping effects on transport properties were quantitatively evaluated. Electrical measurements from graphene field-effect transistors show that the B-doped graphenes have a distinct p-type conductivity with a current on/off ratio higher than 10 2. Especially, the band gap of graphenes is tuned from 0 to ∼0.54 eV with increasing B content, leading to a series of modulated transport properties. We believe the controllable doping for graphenes with predictable transport properties may pave a way for the development of graphene-based devices. © 2012 American Chemical Society.

Research Area(s)

  • boron-doped, controllable doping, grapheme, microwave plasma, p-type transport properties, tunable band gaps

Citation Format(s)

Tunable band gaps and p-type transport properties of boron-doped graphenes by controllable ion doping using reactive microwave plasma. / Tang, Yong-Bing; Yin, Li-Chang; Yang, Yang et al.

In: ACS Nano, Vol. 6, No. 3, 27.03.2012, p. 1970-1978.

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