Stabilizing far-from-equilibrium (Mo,Ti)S2 thin films by metal sulfurization at reduced temperature
Abstract
We report the synthesis of large-area, high-Ti-content, Mo1−xTixS2 alloy thin films in the 2H phase at temperature as low as 500 °C using a scalable two-step method of metal film deposition, followed by sulfurization in H2S. Film processing at higher temperature accelerates Ti segregation, film coarsening, and the formation of TiS2 in the 1T phase. Crystal growth at higher temperature results in the formation of multiple binary sulfide phases, in agreement with the equilibrium phase diagram. Making highly metastable, smooth, and uniform single-phase alloy films, therefore, hinges on developing low-temperature processing. Our results are relevant to the development of technologies based on designer transition metal dichalcogenide alloys, including in photonic integrated circuits and gas sensing.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 16, 2023
- Source ID
- 10.1116/6.0002227
Entities
People
- Aubrey Penn
- Baoming Wang
- Frances M. Ross
- Kate Reidy
- Kevin Ye
- R Jaramillo
- Seng Huat Lee
- Yifei Li
- Zhiqiang Mao
Organizations
- Massachusetts Institute of Technology
- National Science Foundation
- Office of Naval Research
- Pennsylvania State University