电介质
材料科学
带隙
光导率
折射率
单层
密度泛函理论
半导体
光电子学
吸收(声学)
直接和间接带隙
介电函数
电子结构
凝聚态物理
纳米技术
化学
计算化学
物理
复合材料
作者
Vipin Kumar,Rajneesh Kumar Mishra,Gyu Jin Choi,Jeong Won Ryu,Pushpendra Kumar,Jin Seog Gwag
出处
期刊:Luminescence
[Wiley]
日期:2023-02-15
卷期号:38 (7): 1368-1373
被引量:2
摘要
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.
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