Abstract
The structural properties of CBD deposited CdS thin films have been studied by varying the processing parameters and Cd/S ratio of the starting Precursors in order to better understand the growth conditions. A CdS thin film was prepared on glass substrate by CBD method from a bath containing Thiourea and Ammonium hydroxide. The structural analysis was performed by X-ray Diffraction (XRD). The deposited CdS thin film was a cubic phase with small nano crystalline grains. The film was deposited at 60°C for 2 hours. After sintering the film at 300°C for 1 hour the color of the film was changed like dark yellowish and the thickness of the film was obtained 100 nm. The FTIR was done at room temperature over 350 cm-1 to 4500 cm-1 and it showed the existence of different functional group in the sample and their probable source. These studies have allowed us to establish a standard set of conditions for the fabrication of homogeneous and continuous very thin CdS films in laboratory and this preparation technique is also suitable for preparing highly efficient thin film due to its advantages such as simple, large area films, low deposition temperature and low-cost method.
Highlights
CdS thin films are regularly fabricated using different synthesis methods because of its vast area of application
We mainly focus on n-type CdS thin films synthesized by Chemical bath deposition method [1, 2]
This study elucidates the step by step procedure of the preparation of pure CdS thin films by chemical bath deposition method
Summary
CdS thin films are regularly fabricated using different synthesis methods because of its vast area of application. CdS thin films have been fabricated using different methods such as spray pyrolysis, electrochemical deposition, molecular beam deposition, laser ablation, chemical bath deposition and SILAR method [3,4,5,6,7,8]. All these methods require sophisticated instruments and which are very costly. It is easy to handle and capable of yielding good quality thin films This technique has been extensively used for the preparation of CdS thin films because of its application as a window layer material in solar cell fabrication. Toma Scientific Officer, Experimental Physics Division, Atomic Energy Centre, 4-Kazi Nazrul Islam Avenue, Shahbag, Dhaka- 1000, Bangladesh Atomic Energy Commission, Bangladesh
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