Figure 2
From: Resistive switching and battery-like characteristics in highly transparent Ta2O5/ITO thin-films

(a–c) XPS results of ITO thin films, (a) indium (In) peaks related to 3d3/2 and 3d5/2 orbitals, (b) Tin (Sn) peaks related to 3d3/2 and 3d5/2 orbitals, (c) Oxygen (O) peak related to 1 s orbitals. (d,e) XPS results of Ta2O5 thin films, (d) tantalum (Ta) peaks related to 4f7/2 and 4f5/2, (e) Oxygen (O) peak related to 1 s orbitals.