“…In contrast, Parent et al (5) showed by X-ray absorption spectroscopy on ITO films prepared by a pyrolysis technique that the presence of tin disorganizes the host network and relaxes the oxygen environment toward a configuration which is similar to that of rhomboedral In O (for indium cations) and SnO (for tin cations). Shigesato et al (7) showed that tin can segregate close to the film surface or along grain boundaries to form an insulating phase.…”