Ab–initio study of the electronic and optical traits of Na0.5Bi0.5TiO3 nanostructured thin film

Journal of Optoelectronical Nanostructures

مقاله 4، دوره 4، شماره 3 - شماره پیاپی 14، آبان 2019، صفحه 47-58   

نوع مقاله: Articles

نویسندگان

Mohammadreza Askaripour Lahiji^{* 1}؛ Ali Abdolahzadeh Ziabari²

¹Department of applied mathematics, Astaneh Ashrafieh Branch, Islamic Azad University, Astaneh Ashrafieh, Iran

²Nano Research Lab, Lahijan Branch, Islamic Azad University, P.O. Box: 1616, Lahijan, Iran

تاریخ دریافت: 04 اردیبهشت 1398،  تاریخ بازنگری: 13 خرداد 1398،  تاریخ پذیرش: 21 تیر 1398 

چکیده

The electronic, and optical properties of rhombohedral Na0.5Bi0.5TiO3
nanostructured thin film have been studied by the first–principle approach. Density
functional theory (DFT) has been employed to calculate the fundamental properties of
the layers using full–potential linearized augmented plane–wave (FPLAPW) method. A
2×2×1 supercell was constructed with two vacuum slabs on top and down of the
supercell. A geometry optimization was performed by PBE method. The optimized thin
film structure was used for the intended calculations. As well, the reflectance, dielectric
function, refractive index, of the thin film were calculated in the UV–vis region. Results
showed very well consistency with the available experimental and theoretical reports.
The optical conductivity also followed a similar trend to that of the dielectric constants.
Energy loss function of the modeled compound was also evaluated. The evaluated loss
function showed sharp peaks in UV-vis region and followed a steady state in IR, MIR
and FIR parts of spectrum.

کلیدواژه‌ها

Band Structure؛ DFT؛ Na0.5Bi0.5TiO3 Thin Film؛ Optical Properties

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