The Influence of Heat Treatment on the Optical Parameters of Spray-Deposited CdS: In Thin Films

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• 作者：Shadia J. Ikhmayies
• 刊名：JOM
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：69
• 期：2
• 页码：144-161
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Engineering, general; Chemistry/Food Science, general; Physics, general; Environment, general; Earth Sciences, general;
• 出版者：Springer US
• ISSN：1543-1851
• 卷排序：69

文摘

Cadmium sulfide is an important material for solar cells and optoelectronic devices. For the development of these technologies, a comprehensive optical characterization of this material is required. Doping with indium affects the optical parameters of CdS. In this study, indium-doped cadmium sulfide thin films (CdS:In) were produced by the spray pyrolysis technique. The films were annealed in a nitrogen atmosphere, and the influence of annealing on the optical parameters was investigated. Transmittance was measured and used to deduce absorption coefficient, bandgap energy, extinction coefficient, refractive index, real and imaginary parts of the dielectric constant, optical conductivity, and energy loss before and after annealing. Tailing in the bandgap was assumed to follow Urbach tailing, and the effect of annealing on the width of the tail was studied. Dispersion of the refractive index was analyzed using the single oscillator model, and the influence of annealing on the dispersion parameters is discussed.