Article ID Journal Published Year Pages File Type
1295817 Solid State Ionics 2005 4 Pages PDF
Abstract

The electronic structure of protonic conductor SrZr1–xMxO3–δ (M = Y3+, Sc3+) has been studied by soft-X-ray spectroscopy. The valence band is mainly composed of O 2p state. The conduction band is composed of Zr 4d state. The holes and the acceptor level are observed at the top of valence band and just above the Fermi level (EF), respectively. In H2-annealed SrZr1–xMxO3–δ (M = Y3+, Sc3+), their intensities decrease and the hydrogen-induced level is created at just below EF. The energy separation between the bottom of the hydrogen-induced level and the top of valence band agrees with the activation energy estimated from the electrical conductivity.

Related Topics
Physical Sciences and Engineering Chemistry Electrochemistry
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