Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 34, Issue 38, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1361-648X/ac8036
Keywords
ab initio; Ag2WS4; semiconductors; band gap
Categories
Funding
- Spanish Ministry of Science and Innovation
- Spanish Agencia Estatal de Investigacion, MCIN/AEI [PID2019-106383GB-C41/43]
Ask authors/readers for more resources
This paper presents a theoretical study on the structural stability and physical properties of newly synthesized Ag2WS4. The results show that Ag2WS4 is thermodynamically, mechanically, and dynamically stable in a tetragonal layered structure, and has potential applications in water splitting and optoelectronic devices.
We present for the first time a theoretical study of the structural stability and physical properties of the newly synthesized Ag2WS4. The study contributes to a better understanding of its electronic and vibrational properties, which is fundamental for the optimization of the technological applications of Ag2WS4. Calculations have been carried out by means of density-functional theory. The obtained results support that Ag2WS4 is thermodynamically, mechanically, and dynamically stable in a tetragonal layered structure, in good agreement with experiments. Calculations have also been used to obtain phonon frequencies, their assignments, and the Raman scattering spectrum. Furthermore, we show that Ag2WS4 has a brittle structure, that is governed by van der Waals interactions, which favors its exfoliation as a low-dimensional structure. Additionally, the results show that Ag2WS4 has a band gap of 2.02 eV with a favorable band-edge diagram for water splitting as well as for optoelectronic applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available