Electronic structure of proton conducting BaCe0.90Y 0.10O3-δ

T. Higuchi; T. Tsukamoto; H. Matsumoto; T. Shimura; K. Yashiro; T. Kawada; J. Mizusaki; S. Shin; T. Hattori

doi:10.1016/j.ssi.2005.09.032

Electronic structure of proton conducting BaCe_0.90Y _0.10O_3-δ

T. Higuchi, T. Tsukamoto, H. Matsumoto, T. Shimura, K. Yashiro, T. Kawada, J. Mizusaki, S. Shin, T. Hattori

ENV - Environmental Studies for Advanced Society

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

The electronic structure of the protonic conductor Y-doped BaCeO ₃ (BaCe_0.90Y_0.10O_3-δ) has been studied by soft-X-ray spectroscopy. The valence band of H ₂-annealed BaCe_0.90Y_0.10O_3-δ, which consists of the O 2p states hybridized with Ce 4f states, shifts to the higher binding energy side by approximately 0.4 eV. In the air-annealed BaCe_0.90Y_0.10O_3-δ, holes and acceptor levels are observed at the top of the valence band and just above E _F, respectively. Their intensities are lower in H ₂-annealed BaCe_0.90Y_0.10O_3-δ. These findings indicate directly that hydrogen doping compensates for the presence of the holes.

Original language	English
Pages (from-to)	2967-2970
Number of pages	4
Journal	Solid State Ionics
Volume	176
Issue number	39-40
DOIs	https://doi.org/10.1016/j.ssi.2005.09.032
Publication status	Published - 2005 Dec

Keywords

BaCeYO
Electronic structure
Holes
Photoemission spectroscopy (PES)
Protonic conductor
X-ray absorption spectroscopy (XAS)

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10.1016/j.ssi.2005.09.032

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title = "Electronic structure of proton conducting BaCe0.90Y 0.10O3-δ",

abstract = "The electronic structure of the protonic conductor Y-doped BaCeO 3 (BaCe0.90Y0.10O3-δ) has been studied by soft-X-ray spectroscopy. The valence band of H 2-annealed BaCe0.90Y0.10O3-δ, which consists of the O 2p states hybridized with Ce 4f states, shifts to the higher binding energy side by approximately 0.4 eV. In the air-annealed BaCe0.90Y0.10O3-δ, holes and acceptor levels are observed at the top of the valence band and just above E F, respectively. Their intensities are lower in H 2-annealed BaCe0.90Y0.10O3-δ. These findings indicate directly that hydrogen doping compensates for the presence of the holes.",

keywords = "BaCeYO, Electronic structure, Holes, Photoemission spectroscopy (PES), Protonic conductor, X-ray absorption spectroscopy (XAS)",

author = "T. Higuchi and T. Tsukamoto and H. Matsumoto and T. Shimura and K. Yashiro and T. Kawada and J. Mizusaki and S. Shin and T. Hattori",

note = "Funding Information: This work was partially supported by New Energy and Industrial Technology Development Organization (NEDO) and the Foundation for Materials Science and Technology of Japan (MST Foundation).",

year = "2005",

month = dec,

doi = "10.1016/j.ssi.2005.09.032",

language = "English",

volume = "176",

pages = "2967--2970",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

number = "39-40",

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TY - JOUR

T1 - Electronic structure of proton conducting BaCe0.90Y 0.10O3-δ

AU - Higuchi, T.

AU - Tsukamoto, T.

AU - Matsumoto, H.

AU - Shimura, T.

AU - Yashiro, K.

AU - Kawada, T.

AU - Mizusaki, J.

AU - Shin, S.

AU - Hattori, T.

N1 - Funding Information: This work was partially supported by New Energy and Industrial Technology Development Organization (NEDO) and the Foundation for Materials Science and Technology of Japan (MST Foundation).

PY - 2005/12

Y1 - 2005/12

N2 - The electronic structure of the protonic conductor Y-doped BaCeO 3 (BaCe0.90Y0.10O3-δ) has been studied by soft-X-ray spectroscopy. The valence band of H 2-annealed BaCe0.90Y0.10O3-δ, which consists of the O 2p states hybridized with Ce 4f states, shifts to the higher binding energy side by approximately 0.4 eV. In the air-annealed BaCe0.90Y0.10O3-δ, holes and acceptor levels are observed at the top of the valence band and just above E F, respectively. Their intensities are lower in H 2-annealed BaCe0.90Y0.10O3-δ. These findings indicate directly that hydrogen doping compensates for the presence of the holes.

AB - The electronic structure of the protonic conductor Y-doped BaCeO 3 (BaCe0.90Y0.10O3-δ) has been studied by soft-X-ray spectroscopy. The valence band of H 2-annealed BaCe0.90Y0.10O3-δ, which consists of the O 2p states hybridized with Ce 4f states, shifts to the higher binding energy side by approximately 0.4 eV. In the air-annealed BaCe0.90Y0.10O3-δ, holes and acceptor levels are observed at the top of the valence band and just above E F, respectively. Their intensities are lower in H 2-annealed BaCe0.90Y0.10O3-δ. These findings indicate directly that hydrogen doping compensates for the presence of the holes.

KW - BaCeYO

KW - Electronic structure

KW - Holes

KW - Photoemission spectroscopy (PES)

KW - Protonic conductor

KW - X-ray absorption spectroscopy (XAS)

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U2 - 10.1016/j.ssi.2005.09.032

DO - 10.1016/j.ssi.2005.09.032

M3 - Article

AN - SCOPUS:28844450691

SN - 0167-2738

VL - 176

SP - 2967

EP - 2970

JO - Solid State Ionics

JF - Solid State Ionics

IS - 39-40

ER -

Electronic structure of proton conducting BaCe_0.90Y _0.10O_3-δ

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Keywords

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