期刊
OPTIK
卷 130, 期 -, 页码 517-524出版社
ELSEVIER GMBH
DOI: 10.1016/j.ijleo.2016.10.139
关键词
Double perovskites; Direct bandgap; Chemical bonding; Dielectric function; Reflectivity; Optical conductivity
类别
资金
- King Saud University [RGP-VPP-311]
Different physical properties of the double perovskite A(2)InSbO(6) (A = Ca, Sr, Ba) compounds are investigated using the full potential linear augmented plane wave method within the density functional theory (DFT) where different generalized gradient approximations are used for approximating the exchange-correlation effects. Importantly, the DFT calculated structural indexes are in close agreement with the experimental data. The compounds show a semiconductor nature with a direct bandgap where the upper valence band is mainly consist of the O-p state, and the lower part of the conduction band is composed of the Sb-s state. Furthermore, the electron charge density plots show that the chemical bonding is partially covalent and ionic. From the DFT calculated optical properties, it is clear that the A(2)InSbO(6) (A= Ca, Sr, Ba) compounds strongly absorb and reflect the incident radiation in the visible and ultraviolet range and can therefore be effectively used in optoelectronic devices. (C) 2016 Elsevier GmbH. All rights reserved.
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