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

Keywords

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

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Photo-responsive transistors of CVD grown single-layer MoS<sub>2</sub> and its nanoscale optical characteristics'. Together they form a unique fingerprint.

  • Cite this