Facile Doping in Two-Dimensional Transition-Metal Dichalcogenides by UV Light

Thuc Hue Ly*, Qingming Deng, Manh Ha Doan, Lain Jong Li, Jiong Zhao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Two-dimensional (2D) materials have been emerging as potential candidates for the next-generation materials in various technology fields. The performance of the devices based on these 2D materials depends on their intrinsic band structures as well as the extrinsic (doping) effects such as surrounding chemicals and environmental oxygen/moisture, which strongly determines their Fermi energy level. Herein, we report the UV treatments on the 2D transition-metal dichalcogenides, to controllably dope the samples without damaging the crystal structures or quenching the luminescence properties. More surprisingly, both n-type and p-type doping can be achieved depending on the initial status of the sample and the UV treatment conditions. The doping mechanisms were elaborated on the atomic scale with transmission electron microscopy and ab initio calculations. The facile doping by UV light has potential to be integrated with photolithography processes, aiming for the large-scale integrated device/circuits design and fabrications.

Original languageEnglish (US)
Pages (from-to)29893-29901
Number of pages9
JournalACS Applied Materials and Interfaces
Volume10
Issue number35
DOIs
StatePublished - Sep 5 2018

Keywords

  • atomic defects
  • atomic force microscopy
  • doping
  • transition-metal dichalcogenides
  • transmission electron microscopy
  • two-dimensional

ASJC Scopus subject areas

  • Materials Science(all)

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