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The Electronic, Structural, and Optical Properties of CaNb2O6 Compound: Theoretical Study
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.5 ) Pub Date : 2021-09-23 , DOI: 10.1002/pssb.202100416
Ubeyt Duman 1 , Murat Aycibin 1 , Ömer Faruk Özdemir 1
Affiliation  

Based on the density functional theory (DFT) as incorporated in the Wien2k package, the lattice parameters and atomic position of calcium niobate (CaNb2O6) were optimized. Furthermore, the electronic, optical, and structural properties of the relaxed compound were calculated. Relaxed calcium niobate presents a direct band gap with 3.5 eV, which makes it a good candidate for photovoltaic applications. The DFT calculation reveals that the O atoms make the major contributions in the valence band, while Nb and Ca atoms are the dominant contributors in lower and upper portions of the conduction band, respectively. Moreover, the optical properties of compounds such as refractivity, dielectric constant, reflectivity, etc. are calculated and discussed in detail.

中文翻译:

CaNb2O6 化合物的电子、结构和光学特性:理论研究

基于包含在 Wien2k 包中的密度泛函理论 (DFT),优化了铌酸钙 (CaNb 2 O 6 )的晶格参数和原子位置。此外,还计算了松弛化合物的电子、光学和结构特性。松弛的铌酸钙具有 3.5 eV 的直接带隙,这使其成为光伏应用的理想选择。DFT 计算表明,O 原子在价带中起主要贡献,而 Nb 和 Ca 原子分别是导带下部和上部的主要贡献者。此外,还详细计算和讨论了化合物的光学性质,如折射率、介电常数、反射率等。
更新日期:2021-09-23
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