Abstract
The ab initio projector augmented wave (PAW) method is used to calculate the electronic structure of Li-doped cadmium oxide with NaCl structure. The preference energy for Li atoms in interstitial sites and the energy of impurity oxidation are calculated. Interstitial positions for Li atoms are shown to be stable under thermodynamic equilibrium, but Li atoms can substitute Cd atoms in presence of vacancies in the oxygen sublattice. We consider the following complexes: one Li atom in the interstitial site and the other Li atom in Cd position; one Li atom in Cd position and one oxygen vacancy; a pair of oxygen vacancies; and show that these complexes are formed to have the shortest possible distance between their components. The band gap substantially decreases when Li atoms occupy interstitial sites to explain considerable increase of experimental conductivity.
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Original Russian Text © 2018 V. P. Zhukov, I. R. Shein.
Translated from Zhurnal Strukturnoi Khimii, Vol. 59, No. 2, pp. 265–272, March–April, 2018.
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Zhukov, V.P., Shein, I.R. Structure and Thermodynamic Characteristics of Impurity Centers in Lithium-Doped Cadmium Oxide: an Ab Initio Paw-Study. J Struct Chem 59, 253–260 (2018). https://doi.org/10.1134/S0022476618020014
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DOI: https://doi.org/10.1134/S0022476618020014