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Deposition and Characterization of Spray Pyrolytic Cadmium Sulphide Thin Film |
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PP: 9-12 |
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doi:10.18576/ijtfst/120102
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Author(s) |
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P. Gopalakrishnan,
L. Amalraj,
K. Vijayakumar,
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Abstract |
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| Precursor solutions of cadmium chloride (CdCl2) and thiourea [(NH2)2CS] were used to prepare Cadmium sulphide (CdS) thin film on glass substrate by chemical spray pyrolysis technique at the substrate temperature of 623 K. The structural properties of the film were investigated through the analysis of X-ray diffraction pattern (XRD), scanning Electron Microscope (SEM) and Energy Dispersive Analysis (EDAX).The growth of crystal became stronger and more oriented as seen in the X-ray diffraction pattern. This diffraction analysis revealed the polycrystalline nature and the preferential orientation growth of CdS compound having hexagonal structure along (002) plane. The size of the cadmium sulphide crystallite with nano dimension 27.73 nm was determined using the Full Width Half Maximum value of the Bragg peak. The surface morphology had been observed on the surface of this film using scanning electron microscope. The stoichiometric property was determined using Energy Dispersive Analysis X ray spectrum and the optical absorption and transmittance spectra have been recorded for this film in the wavelength range 300–1100 nm. The optical band gap energy is found to be 2.3 eV with direct allowed band-to-band transition for film deposited at 623 K. |
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