Electrical Characterization of Chemically Deposited CdS Thin Films under Magnetic Field Application

CdS films were grown onto glass substrates by the chemical-bath deposition (CBD) technique using cadmium chloride and thiourea as Cd and S ion suppliers, respectively. The growth process was carried out with and without constant magnetic field applications. The field was applied perpendicular to the substrate at two values of the magnetic induction: 0.040 and 0.077 T. As result of the application of the magnetic field during the growth process, changes in dark conductivity and carrier concentration were observed, added to the evolution of native defect energy levels, evidenced from van der Pauw and Hall effects versus temperature data, and thermally stimulated current measurements, respectively. In particular, the electrical properties of the CBD-CdS films become enhanced by field application.