fig3
Figure 3. Schematic diagram of a typical p-n heterojunction formed at the heterophasic interface of a p-type (BCFZY)-n-type (ZnO) semiconductor membrane and the corresponding energy band alignment mechanism proposed for interpreting the charge separation and ionic transportation process[30]. BCFZY: BaCo0.4Fe0.4Zr0.1Y0.1O3-δ; NCAL: Ni0.8Co0.15Al0.05LiO2-δ; CB: conduction band; VB: valence band.
