Making Large‐Area Titanium Disulfide Films at Reduced Temperature by Balancing the Kinetics of Sulfurization and Roughening

Abstract

The synthesis of large‐area TiS2 thin films is reported at temperatures as low as 500 °C using a scalable two‐step method of metal film deposition followed by sulfurization in an H2S gas furnace. It is demonstrated that the lowest‐achievable sulfurization temperature depends strongly on the oxygen background during sulfurization. This dependence arises because TiO bonds present a substantial kinetic and thermodynamic barrier to TiS2 formation. Lowering the sulfurization temperature is important to make smooth films, and to enable integration of TiS2 and related transition metal dichalcogenides—including metastable phases and alloys—into device technology.

Document Details

Document Type
Pub Defense Publication
Publication Date
Jul 02, 2020
Source ID
10.1002/adfm.202003617

Entities

People

  • Akshay Singh
  • Frances M. Ross
  • Kate Reidy
  • Rafael Jaramillo
  • Seong Soon Jo
  • Yifei Li

Organizations

  • Army Research Office
  • Indian Institute of Science, Bengaluru
  • Massachusetts Institute of Technology
  • National Science Foundation
  • Office of Naval Research

Tags

Fields of Study

  • Materials science

Readers

  • Thin Film Deposition Science.