Negative photoresponse in Ti3C2Tx MXene monolayers

Nataliia S. Vorobeva, Saman Bagheri, Angel Torres, Alexander Sinitskii

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Two-dimensional transition metal carbides, nitrides, and carbonitrides, collectively known as MXenes, are finding numerous applications in many different areas, including optoelectronics and photonics, but there is limited information about their intrinsic photoresponse. In this study, we investigated the visible and near-infrared range photoresponse of Ti3C2T x , the most popular MXene material to date. The electrical measurements were performed on devices based on individual monolayer Ti3C2T x MXene flakes, which were characterized by a variety of microscopic and spectroscopic methods. For MXene devices with different electrode layouts, the current reproducibly decreased under illumination with either white light or lasers with different wavelengths in the visible and near-infrared region, thus demonstrating a negative photoresponse. The understanding of the intrinsic photoresponse of Ti3C2T x should facilitate the optoelectronic and photonic applications of MXenes.

Original languageEnglish (US)
Pages (from-to)3953-3960
Number of pages8
JournalNanophotonics
Volume11
Issue number17
DOIs
StatePublished - Sep 2 2022

Keywords

  • MXenes
  • TiCT
  • negative photoresponse
  • titanium carbide

ASJC Scopus subject areas

  • Biotechnology
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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