Optical and dielectric response of two-dimensional WX2 (X = Cl, O, S, Se, Te) monolayers: A comprehensive study based on density functional theory.
Luminescence
; 38(7): 1368-1373, 2023 Jul.
Article
in En
| MEDLINE
| ID: mdl-36740829
ABSTRACT
Here, we study the dielectric and optical properties of two-dimensional (2D) WX2 monolayers, where X is Cl, O, S, Se, and Te. First principle electronic band structure calculations reveal that all materials are direct band gap semiconductors except WO2 and WCl2 , which are found to be indirect band gap semiconducting 2D materials. The dielectric response of these materials is also systematically investigated. The obtained results suggest that these materials are suitable as dielectric materials to suppress unwanted signal noise. The optical properties of these 2D materials, such as absorption, reflection and extinction coefficients, refractive index, and optical conductivity, are also calculated from the dielectric function. It is found that these materials exhibit excellent optical response. The present electronic, dielectric, and optical findings indicate that WX2 monolayers have an opportunity in electronic, optical, and optoelectronic device applications.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Semiconductors
/
Electronics
Language:
En
Journal:
Luminescence
Journal subject:
BIOFISICA
/
BIOQUIMICA
Year:
2023
Document type:
Article
Affiliation country:
Corea del Sur