ELECTRONIC STRUCTURE AND OPTICAL PROPERTIES OF A PHOTOLUMINESCENT TANTALITE: EuKNaTaO5

Xiaoli Zhang (), Guoren Zhang, Ting Jia, Ying Guo and Zhi Zeng ()
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Xiaoli Zhang: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, People's Republic of China
Guoren Zhang: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, People's Republic of China
Ting Jia: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, People's Republic of China
Ying Guo: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, People's Republic of China
Zhi Zeng: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, People's Republic of China

International Journal of Modern Physics C (IJMPC), 2011, vol. 22, issue 03, 263-269

Abstract: The electronic structure and linear optical properties of luminescent materialEuKNaTaO5are investigated by employing full-potential linear augmented plane wave method. Our results show highly localizedEu4fstates which pinned in the energy range below the unoccupiedTa5dstates and over the occupiedO2pstates. The optical spectra are analyzed and interpreted in terms of the electronic structure. It is found thatEuions absorb the major parts of the incident energy below 3.3 eV. This is in accordance with the experimental result thatEuKNaTaO5phosphor is efficient under the excitation of 535 nm (2.3 eV) visible part of the spectrum. The linear optical properties are found to be anisotropic.

Keywords: Electronic structure; photoluminescent; Euion; dielectric function; 71.20.-b; 42.70.-a; 71.20.Eh; 42.79.Kr (search for similar items in EconPapers)
Date: 2011
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DOI: 10.1142/S0129183111016208

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