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<p>In the present investigation, low-level doping concentrations (0, 1, 2, and 3 wt%) of dysprosium were doped in cadmium oxide (CdO) thin films through the sol-gel spin coating method. The preferential growth orientation (111) planes were revealed by incorporating Dy in the CdO matrix by X-ray diffraction patterns. The surface structure was examined using field emission scanning electron microscopy. The optical transmittance of the deposited Dy-doped CdO thin films was increased from 50 to 85% in the visible spectrum when the quantity of Dy-doping increased in CdO thin films. The band gap progressively widened from 2.0 to 2.5&#xa0;eV due to increased Dy doping at various levels. The photoluminescence spectrum and chromaticity (CIE) diagram revealed that the Dy-doped CdO thin films might be useful for blue light LEDs. Raman measurements at room temperature showed metal oxide (Cd–O) bond vibrations at 303, 574, and 1109&#xa0;cm<sup>− 1</sup>.</p>

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Impact of Dy ion on the structure and optoelectronic properties of CdO thin films: sol-gel spin coating method

  • 期刊论文

  • 发表日期：

    2025年6月12日

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  • Seema Gupta,
  • Rajesh Lalwani,
  • Mukul Gupta,
  • Prashant Kumar Sahu,
  • Onkarnath,
  • Sanjib Banerjee

摘要

In the present investigation, low-level doping concentrations (0, 1, 2, and 3 wt%) of dysprosium were doped in cadmium oxide (CdO) thin films through the sol-gel spin coating method. The preferential growth orientation (111) planes were revealed by incorporating Dy in the CdO matrix by X-ray diffraction patterns. The surface structure was examined using field emission scanning electron microscopy. The optical transmittance of the deposited Dy-doped CdO thin films was increased from 50 to 85% in the visible spectrum when the quantity of Dy-doping increased in CdO thin films. The band gap progressively widened from 2.0 to 2.5 eV due to increased Dy doping at various levels. The photoluminescence spectrum and chromaticity (CIE) diagram revealed that the Dy-doped CdO thin films might be useful for blue light LEDs. Raman measurements at room temperature showed metal oxide (Cd–O) bond vibrations at 303, 574, and 1109 cm− 1.