La-doped BaSnO3—Degenerate perovskite transparent conducting oxide: Evidence from synchrotron x-ray spectroscopy
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- S. Sallis
- Materials Science and Engineering, Binghamton University 1 , Binghamton, New York 13902, USA
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- D. O. Scanlon
- Kathleen Lonsdale Materials Chemistry, Department of Chemistry, University College London 2 , 20 Gordon Street, London WC1H 0AJ, United Kingdom
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- S. C. Chae
- Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University 3 , Piscataway, New Jersey 08854, USA
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- N. F. Quackenbush
- Department of Physics, Applied Physics and Astronomy, Binghamton University 4 , Binghamton, New York 13902, USA
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- D. A. Fischer
- Materials Science and Engineering Laboratory, National Institute of Standards and Technology 5 , Gaithersburg, Maryland 20899, USA
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- J. C. Woicik
- Materials Science and Engineering Laboratory, National Institute of Standards and Technology 5 , Gaithersburg, Maryland 20899, USA
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- J.-H. Guo
- Advanced Light Source, Lawrence Berkeley National Laboratory 6 , Berkeley, California 94720, USA
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- S. W. Cheong
- Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University 3 , Piscataway, New Jersey 08854, USA
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- L. F. J. Piper
- Materials Science and Engineering, Binghamton University 1 , Binghamton, New York 13902, USA
説明
<jats:p>We report direct evidence of conduction band filling in 3% La-doped BaSnO3 using hard x-ray photoelectron spectroscopy. Direct comparisons with hybrid density functional theory calculations support a 3.2 eV indirect band gap. The use of hybrid DFT is verified by excellent agreement between our photoelectron spectra and O K-edge x-ray emission and absorption spectra. Our experimental and computational results demonstrate that the conduction band is primarily of Sn 5s orbital character with little O 2p contribution, which is a prerequisite for designing a perovskite-based transparent conducting oxide.</jats:p>
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 103 (4), 042105-, 2013-07-22
AIP Publishing
