Figure 7
From: Photoluminescence and photocatalytic properties of rhombohedral CuGaO2 nanoplates

(a) Schematic diagram showing the energy band structure and electron-hole pair separation in the p-type CuGaO2/n-type ZnO, (b) I-V curve of p-type CuGaO2 nanoplates/n-type ZnO film shows rectification characters.