材料科学
热电效应
带隙
钙钛矿(结构)
卤化物
电介质
光电子学
直接和间接带隙
功勋
塞贝克系数
吸收(声学)
电子结构
凝聚态物理
化学
热力学
结晶学
物理
无机化学
复合材料
作者
Q. Mahmood,Ghulam Mustafa,Manal Morsi,Hind Albalawi,Tahani H. Flemban,M. Hassan,Hind Althib,M.I. Khan,Taher Ghrib
出处
期刊:Physica Scripta
[IOP Publishing]
日期:2021-05-12
卷期号:96 (7): 075703-075703
被引量:11
标识
DOI:10.1088/1402-4896/abfba8
摘要
The double perovskite halides owing to their environmental stability, non-toxicity and remarkable efficiency are emerging as a potential candidate for photovoltaic, solar cell and thermoelectric applications. The tolerance factor and formation energy are computed for structural, and thermodynamic existence in cubic phase. The electron density regulates the charge transfer and bonding. Here we report a comprehensive study of optical, electronic, and thermoelectric properties of K2TeX6 (X = Cl, Br, and I). The electronic band structure analysis reveals indirect semiconducting band gap lying within 3.2–1.68 eV. The substitution of Cl with Br and I reduces band gap with a shift of maximum absorption from ultraviolet to visible region. The optical characteristics are analyzed for the incident energy range 0–5eV by computing dielectric constant, absorption, reflection, and optical loss. Moreover, transport properties are also explained in terms of the exotic variations in the calculated Seebeck coefficient, electronic and thermal conductivities. Figure of merit is elaborated to reveal their potential for thermoelectric applications.
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