Fabrication of Ti3C2Tx MXene Transparent Thin Films with Tunable Optoelectronic Properties

Kanit Hantanasirisakul, Meng Qiang Zhao, Patrick Urbankowski, Joseph Halim, Babak Anasori, Sankalp Kota, Chang E. Ren, Michel W. Barsoum, Yury Gogotsi

Research output: Contribution to journalArticlepeer-review

610 Scopus citations

Abstract

MXenes, a new class of 2D transition metal carbides and carbonitrides, show great promise in supercapacitors, Li-ion batteries, fuel cells, and sensor applications. A unique combination of their metallic conductivity, hydrophilic surface, and excellent mechanical properties renders them attractive for transparent conductive electrode application. Here, a simple, scalable method is proposed to fabricate transparent conductive thin films using delaminated Ti3C2 MXene flakes by spray coating. Homogenous films, 5–70 nm thick, are produced at ambient conditions over a large area as shown by scanning electron microscopy and atomic force microscopy. The sheet resistances (Rs) range from 0.5 to 8 kΩ sq−1 at 40% to 90% transmittance, respectively, which corresponds to figures of merit (the ratio of electronic to optical conductivities, σDCopt) around 0.5–0.7. Flexible, transparent, and conductive films are also produced and exhibit stable Rs values at up to 5 mm bend radii. Furthermore, the films' optoelectronic properties are tuned by chemical or electrochemical intercalation of cations. The films show reversible changes of transmittance in the UV–visible region during electrochemical intercalation/deintercalation of tetramethylammonium hydroxide. This work shows the potential of MXenes to be used as transparent conductors in electronic, electrochromic, and sensor applications.

Original languageEnglish (US)
Article number1600050
JournalAdvanced Electronic Materials
Volume2
Issue number6
DOIs
StatePublished - Jun 1 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

Keywords

  • MXene
  • optoelectronic properties
  • spray coating
  • titanium carbide
  • transparent conductive electrodes

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