Shallow Hole Levels in Ion-Implanted CdS

Abstract
Thermally stimulated current measurements have shown the existence of a hole level 0.05 eV above the valence‐band edge in P‐implanted CdS. The thermally released carrier could be identified as a hole since the measurement was performed on a diode structure. An additional level with an ionization energy of 0.45 eV was also present. Capacitance measurements of space‐charge density before and after level emptying indicated that some carrier multiplication mechanism is operative during current flow.