Electronic structures of protonic conductors SrTiO3 and SrCeO3 by O 1s X-ray absorption spectroscopy

被引：17

作者：

Higuchi, T

Tsukamoto, T

Sata, N

Ishigame, M

Kobayashi, K

机构：

[1] Sci Univ Tokyo, Dept Appl Phys, Shinjuku Ku, Tokyo 1628601, Japan

[2] Tohoku Univ, Sci Measurements Res Inst, Sendai, Miyagi 9808577, Japan

[3] Natl Inst Mat & Engn, Tsukuba, Ibaraki 3058565, Japan

[4] Nagoya Inst Technol, Nagoya, Aichi 4668555, Japan

[5] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

[6] RIKEN, Wako, Saitama, Japan

来源：

SOLID STATE IONICS | 2002年 / 154卷

关键词：

proton; hole; acceptor; SrTi1-xScxO3; SrCe1-xYbxO3; XAS; electronic structure;

D O I：

10.1016/S0167-2738(02)00474-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electronic structures of protonic conductors SrTi1-xScxO3 and SrCe1-xYbxO3 have been studied by O 1s X-ray absorption spectroscopy (XAS). In SrTi1-xScxO3, hole state and acceptor-induced level are observed in the band gap energy region. Such a structure is also observed in the O 1s XAS spectra of SrCe1-xYbxO3. The XAS structures and their temperature dependence reflect the activation energy estimated from electrical conductivity. These facts indicate that the conductivity is achieved by deep acceptor-induced level lying in the middle of the band gap. (C) 2002 Elsevier Science B.C. All rights reserved.

引用

页码：735 / 739

页数：5

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