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Paper Details

Effect of Thickness on Structural, Optical and Electrical Properties of Chemically Grown Cd0.825pb0.175s Thin Films

M. A. Barote1*, A. A. Yadav2 and E. U. Masumdar2

Journal Title:Journal of Chemical, Biological and physical sciences
Abstract


Thin films of Cd0.825Pb0.175S with different thicknesses have been deposited onto amorphous glass substrates using simple and low-cost chemical bath deposition technique. X-ray diffraction (XRD) analysis of the as-deposited films shows polycrystalline nature. Energy dispersive analysis by X-ray (EDAX) confirms the sulphur deficit films. Scanning electron microscope (SEM) studies show that, the deposited films are well adherent and grains are uniformly distributed over the surface of the substrate. The studies on optical properties show that the direct band gap value decreases from 2.13 eV to 1.72 eV as thickness varied from 1.22 ?m to 2.75 ?m The electrical conductivity and thermoelectric power (TEP) measurements have been carried out in 300-500 K temperature range. The activation energy is found to be thickness dependent and it varies in the range of 0.127-0.168 eV at low temperature range and 0.421-0.514 eV at higher temperature. Semiconductor behavior has been observed from the electrical conductivity measurements. The thermoelectric power measurements reveal that films exhibit n-type conductivity.

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