La-doped BaSnO3 - Degenerate perovskite transparent conducting oxide: Evidence from synchrotron x-ray spectroscopy

S. Sallis, D. O. Scanlon, S. C. Chae, N. F. Quackenbush, D. A. Fischer, J. C. Woicik, J. H. Guo, S. W. Cheong, L. F.J. Piper

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Abstract

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.

Original languageEnglish (US)
Article number042105
JournalApplied Physics Letters
Volume103
Issue number4
DOIs
StatePublished - Jul 22 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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