Abstract
Copper Sulfide (CuS) thin films were deposited onto a glass substrate using the Chemical Bath Deposition (CBD) technique. The chemical bath Precursors were made up of CuSO4, SC(NH2)2, and C4H6O6. Different parameters have been considered to specify the optimum conditions for fabricating CuS thin films, such as solution temperature, deposition time, pH level, and different precursor concentrations. It has been found that the optimum deposition time is 20 min at temperature 80 °C and pH = 11. The optimum precursor concentrations were 0.15 M, 0.2 M, and 0.1 M of CuSO4, SC(NH2)2, and C4H6O6, respectively. The structural properties of the thin film were studied using X-ray diffraction (XRD), and a single peak was observed for the thin film made at optimum conditions, while all other cases were amorphous. It is obvious from the optical characterization that the transmission spectra show a red-shift for the cases of increasing deposition time, bath temperature, C4H6O6 concentration, and pH. For the case of increasing CuSO4, blue shifts in the transmission spectra were observed. The energy band gap, resistivity, and activation energy of CuS thin films under optimum conditions are 2.35 eV, 0.7 Ω·cm, and 0.0152 eV, respectively.
Highlights
In recent years, transition metal chalcogenides have been increasingly studied due to their appropriate physical and chemical properties and potential for use in many industries
CuS thin films were successfully deposited onto commercial glass according to various deposition parameters using chemical bath deposition
It has been concluded that the thickness of the Cus thin film is affected by the concentration of the precursors
Summary
Transition metal chalcogenides have been increasingly studied due to their appropriate physical and chemical properties and potential for use in many industries. Copper sulfide has been extensively studied and has attracted much interest in the recent research due to its special properties and potential applications such as in. Solar cells [8], biomedical applications [9,10], photocatalysis [10], sensors [11], and as a cathode material in lithium chargeable batteries [12], etc It is a binary inorganic chemical compound that occurs in nature as a dark indigo blue mineral, which has a general formula Cux Sy. It is a binary inorganic chemical compound that occurs in nature as a dark indigo blue mineral, which has a general formula Cux Sy It is present in both synthetic materials and in minerals in the form of CuS (covellite) and Cu2 S (chalcocite).
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