Investigation of the Structural, Optical and Electrical Properties of Copper Selenide Thin Films

Abstract

Copper selenide (CuSe) thin films were prepared by chemical bath deposition (CBD) method. X-ray diffraction (XRD) analysis was used to study the structure and crystallite size of CuSe thin film. The grain size and the surface morphology were studied using Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The optical properties were studied using the UV-Visible transmission spectrum. The dielectric properties of the synthesized CuSe thin films were studied at different frequencies and different temperatures. Further, electronic properties, such as valence electron plasma energy, average energy gap or Penn gap, Fermi energy and electronic polarizability of the CuSe thin films were determined. The AC electrical conductivity study revealed that the conduction depended both on the frequency and the temperature. The temperature dependent conductivity study confirmed the semiconducting nature of the films. Photoconductivity measurements were carried out in order to ascertain the positive photoconductivity of the CuSe Thin films. This paper covers what all has been stated above besides discussing the results of I-V characteristics.

Optical and Electrical Properties of Nanocrystalline SnO<sub>2</sub> Thin Films Synthesized by Chemical Bath Deposition Method

“…From Figure 8, it can be seen that the dc conductivity was found to increase with increase in temperature. The plot indicates the exponential behavior of temperature dependent current confirming the semiconducting nature of the SnO 2 thin films [19]. Traps which are present in the SnO 2 thin films may be filled by excitation at low temperature and may be emptied by raising the temperature upon thermal activation.…”

“…The high frequency dielectric constant of the materials is a very important parameter for calculating the physical or electronic properties of materials [18]. All the above parameters as estimated are shown in Table 1.…”

Investigations on the Synthesis, Optical and Electrical Properties of TiO2 Thin Films by Chemical Bath Deposition (CBD) method

“…The conduction mechanism can be explained by the rotation of ions when the temperature of the material is increased. The rotation of ions causes local displacement of electrons in the direction of the applied field, which in turn leads to increase in induced polarization 29 .…”

Optical and Electrical Properties of Chemical Bath Deposited Cobalt Sulphide Thin Films

“…Figure 8 shows the variation of σ dc conductivity versus temperatures. It could be seen that the dc conductivity was increasing with increase in temperature 17 . Traps which are present in the CoS thin films may be filled by excitation at low temperature and may be emptied by raising the temperature by thermal activation.…”