Hole-Proton Mixed Conduction of Perovskite-Oxide Thin Film with Oxygen Vacancies and Lattice Distortion for SOFC Electrode

摘要

Y~(3+)-doped BaPrO_3 (BaPr_(0.8)Y_(0.2)O_(3-δ):BPYO) thin film was prepared on Al_2O_3 (0006) substrate by RF magnetron sputtering. The as-deposited BPYO thin film prepared at 600°C exhibits the a- an c-axes orientation. The electrical conductivity slightly increases in the wet atmosphere and does not much depend on the oxygen partial pressure at 300～600°C. The hole and proton-induced levels are observed at the top of valence band and near the Fermi level, respectively. These results indicate that the BPYO thin film has the hole-proton mixed conduction, which is required for anode of solid state oxide fuel cells.