Effect of O–O bonds on p-type conductivity in Ag-doped ZnO twin grain boundaries Project supported by the National Natural Science Foundation of China (Grant No. 11364009) and Natural Science Foundation of Guangxi Province, China (Grant No. 2014GXNSFFA118004). |
Schematic representation of the energy level for the O–O bond in GB7a: (a) undoped, (b) Ag doping. |