Investigation of Zn1−xCdxO films bandgap and Zn1−xCdxO/ZnO heterojunctions band offset by x-ray photoelectron spectroscopy

Investigation of Zn_1−xCd_xO films bandgap and Zn_1−xCd_xO/ZnO heterojunctions band offset by x-ray photoelectron spectroscopy

Chen Jie, Wang Xue-Min, Zhang Ji-Cheng, Yin Hong-Bu, Yu Jian, Zhao Yan^†, Wu Wei-Dong^‡

(color online) XPS core levels (CLs) of Zn 2p3/2 and the valence band maximum of Zn Cd O (a) and ZnO (b) thin films; XPS core levels (CLs) of Zn 2p3/2 of Zn Cd O/ZnO, Zn Cd O, ZnO, and Cd 3d of Zn Cd O (c).