Photo-responsive transistors of CVD grown single-layer MoS2 and its nanoscale optical characteristics

Hyeon Jung Park, Min Su Kim, Jeongyong Kim, Jinsoo Joo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The single-layer and multi-layers of MoS2 were grown using the chemical vapor deposition (CVD) method. The structural properties of the MoS2 were investigated through X-ray photoelectron spectroscopy (XPS). The optical characteristics in nanoscale of the MoS2 were determined from the analysis of Raman and photoluminescence (PL) spectra using a high-resolution laser confocal microscope (LCM). Thin-film-transistors (TFTs) using a single-layer MoS2 were fabricated, and the photo-responsive current-voltage (I–V) characteristics of the TFTs were measured with varying intensities of incident light. We observed the increase of both the photo-current and mobility with increasing the intensity of incident light. This is due to the contribution of photo-induced charge carriers from the valance band and trap states. The increasing rate of the photo-current of the TFTs with gate bias (i.e. on state) was considerably higher than that in off state, indicating the gate controlled photo-sensitive transistor.

Original languageEnglish
Pages (from-to)1320-1325
Number of pages6
JournalCurrent Applied Physics
Volume16
Issue number10
DOIs
Publication statusPublished - 2016 Oct 1

Fingerprint

Thin film transistors
Chemical vapor deposition
Transistors
transistors
vapor deposition
Phototransistors
thin films
Charge carriers
Structural properties
Photoluminescence
Microscopes
X ray photoelectron spectroscopy
charge carriers
Lasers
microscopes
traps
photoelectron spectroscopy
Electric potential
photoluminescence
high resolution

Keywords

  • Mobility
  • MoS
  • Nanoscale
  • Photo-responsive
  • Photoluminescence
  • Transistor

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Photo-responsive transistors of CVD grown single-layer MoS2 and its nanoscale optical characteristics. / Park, Hyeon Jung; Kim, Min Su; Kim, Jeongyong; Joo, Jinsoo.

In: Current Applied Physics, Vol. 16, No. 10, 01.10.2016, p. 1320-1325.

Research output: Contribution to journalArticle

Park, Hyeon Jung ; Kim, Min Su ; Kim, Jeongyong ; Joo, Jinsoo. / Photo-responsive transistors of CVD grown single-layer MoS2 and its nanoscale optical characteristics. In: Current Applied Physics. 2016 ; Vol. 16, No. 10. pp. 1320-1325.
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