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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Theoretical band energetics of Ba(M0.5Sn0.5)O-3 for solar photoactive applications

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Title
Theoretical band energetics of Ba(M0.5Sn0.5)O-3 for solar photoactive applications
Other Titles
Theoretical band energetics of Ba(M0.5Sn0.5)O-3 for solar photoactive applications
Author
Borse, Pramod H.Lee, Jae SungKim, Hyun G.
Keywords
VISIBLE-LIGHT IRRADIATION; PHOTOCATALYTIC ACTIVITY; SRTIO3 PHOTOCATALYSTS; D(10) CONFIGURATION; WATER DECOMPOSITION; BASNO3; EVOLUTION; LANTHANUM; CHROMIUM; TANTALUM
Issue Date
2006-12
Publisher
AMER INST PHYSICS
Citation
JOURNAL OF APPLIED PHYSICS, v.100, no.12, pp.124915 -
Abstract
We report here a comparative study of the theoretically calculated electronic structures of cubic BaSnO3 and cubic Ba(M0.5Sn0.5)O-3 with M=Ti, V, Cr, Zr, Ce, and Pb, the tetravalent metal ions, to explore their possible efficacy for the visible light photocatalysis and solar energy conversion. We performed the calculations within the framework of density functional theory by using WIEN97 code. The 3d orbitals of Ti, V, and Cr, 4d of Zr, and the 4f and 6s orbitals of Ce and Pb, respectively, contributed to the bottom of the conduction band for narrowing of the band gap of cubic BaSnO3. Calculation of the frequency dependent absorption coefficient I(omega) of Ba(M0.5Sn0.5)O-3 indicated that among the transition metal (Ti, V, Cr, and Zr) doped systems, Cr has comparatively higher visible absorption efficiency, whereas among other metal (Pb and Ce) systems, Pb showed significant absorption coefficient in low energy range (E <= 2 eV). The comparison of the computed optical absorption coefficients shows that the Ba(M0.5Sn0.5)O-3 systems can be arranged with respect to M as (i) Cr > V > Ti among first row transition metals and (ii) Pb > Ce > Zr among rest of tetravalent metals, in decreasing order of photoresponse towards low energy photons (E <= 2.5 eV). (c) 2006 American Institute of Physics
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DOI
10.1063/1.2401040
ISSN
0021-8979
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ECHE_Journal Papers
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