Studies on Effect of Precursor Concentration on Electro-Optical and Photosensing Properties of Spray Pyrolyzed Cdsxse1-X Thin Films
Keywords:
CdSxSe1-x, Spray Pyrolysis, Thin Films, Structural, Electrical, Optical and Photosensing PropertiesAbstract
CdSxSe1-x thin films were prepared by chemical spray Pyrolysis technique. Substrate temperature was optimized and kept constant at 2750C + 50C. Cadmium Chloride, Selenourea and Thiourea each of 0.05 M concentration was used as precursors. Thin films were characterized by X-Ray diffraction spectra, SEM and EDS. Present investigation describes the effect of increase in concentration of Se on TEP and optical properties of as formed films. Optical properties shows high coefficient of absorption with blue shift in absorption edge from 520 nm to 320 nm. A linear increase in band gap is observed for increase in Selenium concentration ( From Eg = 2.33 eV , for X = 0 to Eg = 3.51 for X = 1) for the step of 0.25.
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