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<p>In this study, CdO:Fe (2 wt%) samples were synthesized via chemical coprecipitation, utilizing cadmium nitrate and iron nitrate as precursors at different calcination temperatures (600°C, 700°C, and 800°C). The resulting materials were comprehensively characterized to determine their physicochemical properties and photoconductivity characteristics, with a focus on their structural, morphological, optical, magnetic, and electrical attributes. X-ray diffraction (XRD) analysis confirmed a pure cubic phase in all the CdO:Fe samples. Field emission scanning electron microscopy (FESEM) revealed that the synthesized samples exhibited a spherical, interconnected grain morphology. Energy-dispersive X-ray (EDX) micrographs confirmed the presence of Cd, O, and Fe. The Kubelka–Munk method was used to calculate the optical energy bandgap of the synthesized samples. Magnetization-field curves revealed ferromagnetic behavior in all the samples, with the maximum coercivity observed in the sample annealed at 600&#xa0;°C. The CdO:Fe sample annealed at 800°C demonstrated the highest performance under light, with a maximum responsivity of 41.2 × 10<sup>–1</sup> A/W, an external quantum efficiency of 1329%, and a detectivity of 39 × 10<sup>10</sup> Jones.</p>

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Synthesis and characterization of Fe-doped CdO nanoparticles via a coprecipitation method: application as a promising photodetector

  • 期刊论文

  • 发表日期：

    2025年2月3日

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  • S. Sebastian,
  • P. Diana,
  • V. Ganesh,
  • D. Nagaraju,
  • P. V. Raja Shekar

摘要

In this study, CdO:Fe (2 wt%) samples were synthesized via chemical coprecipitation, utilizing cadmium nitrate and iron nitrate as precursors at different calcination temperatures (600°C, 700°C, and 800°C). The resulting materials were comprehensively characterized to determine their physicochemical properties and photoconductivity characteristics, with a focus on their structural, morphological, optical, magnetic, and electrical attributes. X-ray diffraction (XRD) analysis confirmed a pure cubic phase in all the CdO:Fe samples. Field emission scanning electron microscopy (FESEM) revealed that the synthesized samples exhibited a spherical, interconnected grain morphology. Energy-dispersive X-ray (EDX) micrographs confirmed the presence of Cd, O, and Fe. The Kubelka–Munk method was used to calculate the optical energy bandgap of the synthesized samples. Magnetization-field curves revealed ferromagnetic behavior in all the samples, with the maximum coercivity observed in the sample annealed at 600 °C. The CdO:Fe sample annealed at 800°C demonstrated the highest performance under light, with a maximum responsivity of 41.2 × 10–1 A/W, an external quantum efficiency of 1329%, and a detectivity of 39 × 1010 Jones.