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<p>The p-type copper selenide (CuSe) is a promising material for photovoltaic and optoelectronic applications due to its tunable bandgap and electronic properties. In this study, CuSe was synthesized via a simple, solvent-free mechanochemical method using mortar–pestle grinding under ambient conditions, offering a cost-effective laboratory-scale route. Structural and morphological properties were analyzed using XRD, SEM, and HRTEM. XRD confirms predominantly hexagonal CuSe, supported by SAED patterns, while TEM reveals nanoscale features and SEM shows micron-scale agglomerates due to particle clustering. Optical analysis using UV–VIS and Raman spectroscopy indicates a relatively higher bandgap, attributed to size and defect-related effects. Dielectric properties were evaluated at 2.45&#xa0;GHz, showing low dielectric loss and moderate permittivity suitable for microwave applications. However, dielectric analysis is limited to a single frequency and requires further investigation. These findings highlight CuSe for advanced functional applications.</p> Graphical Abstract <p></p>

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Structural, morphological, optical and dielectrical properties of hexagonal CuSe nanoparticle compounds

  • 期刊论文

  • 发表日期：

    2026年6月18日

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  • Darshan J. Jadav,
  • R. R. Varasada,
  • S. M. Vyas,
  • A. M. Vora

摘要

The p-type copper selenide (CuSe) is a promising material for photovoltaic and optoelectronic applications due to its tunable bandgap and electronic properties. In this study, CuSe was synthesized via a simple, solvent-free mechanochemical method using mortar–pestle grinding under ambient conditions, offering a cost-effective laboratory-scale route. Structural and morphological properties were analyzed using XRD, SEM, and HRTEM. XRD confirms predominantly hexagonal CuSe, supported by SAED patterns, while TEM reveals nanoscale features and SEM shows micron-scale agglomerates due to particle clustering. Optical analysis using UV–VIS and Raman spectroscopy indicates a relatively higher bandgap, attributed to size and defect-related effects. Dielectric properties were evaluated at 2.45 GHz, showing low dielectric loss and moderate permittivity suitable for microwave applications. However, dielectric analysis is limited to a single frequency and requires further investigation. These findings highlight CuSe for advanced functional applications.

Graphical Abstract