Highly conductive group VI transition metal dichalcogenide films by solution-processed deposition

Wooseok Ki, Xiaoying Huang, Jing Li, David L. Young, Yong Zhang

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A new soluble synthetic route was developed to fabricate thin films of layered structure transition metal dichalcogendies, MoS2 and WS2. High-quality thin films of the dichalcogenides were prepared using new soluble precursors, (CH3NH3) 2MS4 (M = Mo, W). The precursors were dissolved in organic solvents and spun onto substrates via both single- and multistep spin coating procedures. The thin films were formed by the thermal decomposition of the coatings under inert atmosphere. Structural, electrical, optical absorption, thermal, and transport properties of the thin films were characterized. Surface morphology of the films was analyzed by atomic force microscopy and scanning electron microscopy. Highly conductive and textured n-type MoS2 films were obtained. The measured room temperature conductivity ∼50 Ω -1 cm-1 is substantially higher than the previously reported values. The n-type WS2 films were prepared for the first time using solution-processed deposition. WS2 displays a conductivity of ∼6.7 Ω-1 cm-1 at room temperature.

Original languageEnglish
Pages (from-to)1390-1395
Number of pages6
JournalJournal of Materials Research
Volume22
Issue number5
DOIs
Publication statusPublished - May 1 2007

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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