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).

Wu Jingjing1, 2, Tang Xin1, 2, †, Long Fei1, 2, Tang Biyu3
       

(color online) Four possible structures of Zn-Σ7( ) GBs, including (a) GB7a, (b) GB7b, (c) GB7c, and (d) GB7d. Red and blue spheres designate O and Zn atoms, respectively.