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<p>Nanoparticles of CdS have been synthesized using the co-precipitation technique. Structure and microstructure inspections were carried out using both direct and indirect methods. HRTEM as a direct technique was employed to measure the particle size = 4nm. For the indirect techniques, the X-ray data analysis was applied to evaluate the crystallite size of 2.5 nm. The lattice parameters and the crystallite size were estimated using Debye–Scherrer. Parameters such as micro strain, dislocation and degree of crystallinity were calculated from XRD. FT-IR spectra demonstrate excellent interaction between the PVA matrix and CdS. The nanocomposite surface and&#xa0;morphology are examined using SEM. A decline in the energy gap value from 2.7 to 2.55 eV with increasing the concentration of CdS nanoparticles is observed. The two main peaks in the PL emission spectra for CdS are located at approximately 475 nm and 500 nm. The energy gap decreases with increasing temperature of&#xa0;CdS / PVA. The nonlinear parameters <i>χ</i><sup><i>(1)</i></sup>, <i>χ</i><sup><i>(3)</i></sup>, and <i>n</i><sub><i>2</i></sub> were determined. A decrease in the bandgap also enhanced the nonlinear optical features, such as the refractive index (<i>n</i><sub>2</sub>) and third-order susceptibility (<i>χ</i><sup>(3</sup>). The photostability rate of CdS/PVA nanocomposite was examined, enhanced after 12 h exposure, and increased by 4.6% after exposure<b>.</b> Overall, the present study highlights how the addition of CdS alters the optical characteristics of the PVA nanocomposite, making it suitable for use in high-tech optical devices<b>.</b></p>

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Facile synthesis, structural, and linear/nonlinear optical properties of CdS/PVA nanocomposite for optoelectronic applications

  • 期刊论文

  • 发表日期：

    2026年6月18日

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  • Samar Al-Shehri,
  • A.F. Mansur,
  • Fatma Abdel Maged

摘要

Nanoparticles of CdS have been synthesized using the co-precipitation technique. Structure and microstructure inspections were carried out using both direct and indirect methods. HRTEM as a direct technique was employed to measure the particle size = 4nm. For the indirect techniques, the X-ray data analysis was applied to evaluate the crystallite size of 2.5 nm. The lattice parameters and the crystallite size were estimated using Debye–Scherrer. Parameters such as micro strain, dislocation and degree of crystallinity were calculated from XRD. FT-IR spectra demonstrate excellent interaction between the PVA matrix and CdS. The nanocomposite surface and morphology are examined using SEM. A decline in the energy gap value from 2.7 to 2.55 eV with increasing the concentration of CdS nanoparticles is observed. The two main peaks in the PL emission spectra for CdS are located at approximately 475 nm and 500 nm. The energy gap decreases with increasing temperature of CdS / PVA. The nonlinear parameters χ(1), χ(3), and n2 were determined. A decrease in the bandgap also enhanced the nonlinear optical features, such as the refractive index (n2) and third-order susceptibility (χ(3). The photostability rate of CdS/PVA nanocomposite was examined, enhanced after 12 h exposure, and increased by 4.6% after exposure. Overall, the present study highlights how the addition of CdS alters the optical characteristics of the PVA nanocomposite, making it suitable for use in high-tech optical devices.