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Abstract <p>The CdS : Fe nanostructured thin films were obtained by chemical spray pyrolysis method when doped CdS with 2 and 4% Fe. XRD results reveal hexagonal lattice structure and the crystal size increases slightly with increase in Fe content. AFM images of CdS films presented smooth free grainy surface and average grain size values were in the area of 51.37 to 63.36 nm, surface roughness decreased from 5.81 to 2.38 nm with increase in Fe content. Optical absorption studies show strong absorption edge at ~440–425 nm, the CdS films transmissions were in the range of 70 to 75% and decreases with increasing concentration of Fe. The bandgap of the film decrease slightly from 2.72 for CdS to 2.62 eV for CdS: Fe 3% films. The extinction coefficient and refractive index also decrease with higher Fe doping concentrations, suggesting modifications in the electronic structure and reduced light loss due to scattering and absorption.</p>

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Effect of Iron Doping on the Structural, Morphological and Optical Properties of Cadmium Sulfide Thin Films Synthesized via Chemical Spray Pyrolysis Technique

  • 期刊论文

  • 发表日期：

    2025年8月14日

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  • Zaid A. Abed,
  • Raghed T. Ahmed,
  • R. S. Mohammed

摘要

Abstract

The CdS : Fe nanostructured thin films were obtained by chemical spray pyrolysis method when doped CdS with 2 and 4% Fe. XRD results reveal hexagonal lattice structure and the crystal size increases slightly with increase in Fe content. AFM images of CdS films presented smooth free grainy surface and average grain size values were in the area of 51.37 to 63.36 nm, surface roughness decreased from 5.81 to 2.38 nm with increase in Fe content. Optical absorption studies show strong absorption edge at ~440–425 nm, the CdS films transmissions were in the range of 70 to 75% and decreases with increasing concentration of Fe. The bandgap of the film decrease slightly from 2.72 for CdS to 2.62 eV for CdS: Fe 3% films. The extinction coefficient and refractive index also decrease with higher Fe doping concentrations, suggesting modifications in the electronic structure and reduced light loss due to scattering and absorption.