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<p>Transparent cadmium picrate (CdP) single crystals were successfully grown from an aqueous solution via a slow evaporation method, yielding pale yellow crystals over 25&#xa0;days. X-ray diffraction confirmed a triclinic crystal structure, while UV–Vis–NIR spectroscopy revealed high optical transparency (~ 80%) in the 400–1100&#xa0;nm range, a cutoff wavelength of 480&#xa0;nm, and an optical bandgap of 2.48&#xa0;eV. FTIR analysis identified characteristic functional groups, and EDX confirmed the expected elemental composition. SEM images provided insight into the crystal’s surface morphology. Thermal stability was assessed through TG/DTA analysis, and microhardness measurements indicated a soft crystal nature. Electrical properties were probed using impedance spectroscopy and Nyquist analysis, while photoluminescence and cyclic voltammetry studies revealed strong emission characteristics and efficient charge transport. Nonlinear optical (NLO) evaluation via the Kurtz–Perry method demonstrated that the CdP crystal exhibits SHG efficiency more than ten times higher than standard KDP crystals, underscoring its potential for advanced optoelectronic and photonic applications.</p>

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Growth, structural, optical, electrical, and nonlinear optical characterization of transparent cadmium picrate (CdP) single crystals for optoelectronic applications

  • 期刊论文

  • 发表日期：

    2025年11月17日

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  • S. Amirsha Evangelin Kezia,
  • N. Balasundari,
  • A. Arulgnanam,
  • T. Sivasakthirani,
  • V. Balasubramanian,
  • R. Suman,
  • B. Shunmugapriya

摘要

Transparent cadmium picrate (CdP) single crystals were successfully grown from an aqueous solution via a slow evaporation method, yielding pale yellow crystals over 25 days. X-ray diffraction confirmed a triclinic crystal structure, while UV–Vis–NIR spectroscopy revealed high optical transparency (~ 80%) in the 400–1100 nm range, a cutoff wavelength of 480 nm, and an optical bandgap of 2.48 eV. FTIR analysis identified characteristic functional groups, and EDX confirmed the expected elemental composition. SEM images provided insight into the crystal’s surface morphology. Thermal stability was assessed through TG/DTA analysis, and microhardness measurements indicated a soft crystal nature. Electrical properties were probed using impedance spectroscopy and Nyquist analysis, while photoluminescence and cyclic voltammetry studies revealed strong emission characteristics and efficient charge transport. Nonlinear optical (NLO) evaluation via the Kurtz–Perry method demonstrated that the CdP crystal exhibits SHG efficiency more than ten times higher than standard KDP crystals, underscoring its potential for advanced optoelectronic and photonic applications.