Electronic Structure and Optical Properties of LiBiO3 Doped with V, Nb, and Ta
Jia Kang , Gang Bi
Journal of Wuhan University of Technology Materials Science Edition ›› 2018, Vol. 33 ›› Issue (4) : 863 -870.
The crystal structure, band structure, density of states, Mulliken charge, bond population and optical properties for LiBi1-xM xO3 (M=V, Nb, and Ta) were investigated using hybrid density functional theory. It was found that LiBiO3 doped with V, Nb, and Ta presented distinctly stronger covalent interactions in M-O (M=V, Nb, and Ta) than Bi-O, thus resulting in mild distortion of the structure and facilitating the separation of photogenerated carriers. Furthermore, the hybridizations of Bi-6s, M-d (M=V, Nb, and Ta) and O-2p widened the valence and conduction bands, which promoted transmission of photogenerated carriers in the band edge and thus caused better photocatalytic performance.
V, Nb, Ta doping / electronic structure / photocatalysis / hybrid density functional
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Based on the reference Air Mass 1.5 Spectra (http://rredc.nrel.gov/solar/spectra/am1.5) and 100% Quantum Efficiency[OL] |
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