SOME PHYSICAL PROPERTIES OF FTO/n-CdS/Au STRUCTURE

Abstract

The cadmium sulfide film was obtained on the FTO glass substrate by chemical bath deposition technique. X-ray diffraction spectrum has revealed that the film was polycrystalline with cubic phase. The optical band gap of the film was evaluated from the absorbance measurement in the wavelength range 300-1800 nm. CdS film have direct band gap with the band gap value is 2.35 eV. The optical transmittance value of the film is %80 in the visible region. The curve of log I versus log V was seen space-charge-limited current regime. The capacitance-voltage (C-V) characteristics of FTO/n-CdS/Au structure have been measured at the various frequencies 100-500 kHz. The conductance-frequency characteristics of FTO/n-CdS/Au structure have been measured and the experimental result shows that the presence of the non-uniform distribution of the interface state. The crystal structural, optical and electrical properties of CdS film was carried out at the room temperature.