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<p>Cadmium oxide films (CdO) have been deposited on substrate made from glass of various substrate temperature (150, 250 &amp; 300&#xa0;°C) using spray pyrolysis technique. Structural properties have been investigated by electron microscope (SEM), X-ray spectroscopy, while optical properties (linear &amp; nonlinear) using UV-Vis spectrometer and z-scan technique. SEM image shows clear effects of temperature increasing on the thin film layer structure. Energy gap from 2.2 to 2.05 with substrate temperature. According to third order nonlinearity of CdO optical properties (which are very valuable for laser control device application and optical limiting), open and closed aperture Z-scan technique with (632.8&#xa0;nm) He-Ne laser wavelength were used to measure the nonlinearity of optical parameters, which included refractive index variation and extinction coefficient.</p>

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Effect of substrate temperature on the structural and optical properties of CdO thin films prepared using spray pyrolysis

  • 期刊论文

  • 发表日期：

    2025年3月15日

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  • A. Irad Mohmad,
  • Araddah Abdulkhaleq Aldabagh,
  • Thoalfiqar Ali Zaker,
  • Mohammad Mahmood Uonis,
  • Tharaa Jirjees Polus

摘要

Cadmium oxide films (CdO) have been deposited on substrate made from glass of various substrate temperature (150, 250 & 300 °C) using spray pyrolysis technique. Structural properties have been investigated by electron microscope (SEM), X-ray spectroscopy, while optical properties (linear & nonlinear) using UV-Vis spectrometer and z-scan technique. SEM image shows clear effects of temperature increasing on the thin film layer structure. Energy gap from 2.2 to 2.05 with substrate temperature. According to third order nonlinearity of CdO optical properties (which are very valuable for laser control device application and optical limiting), open and closed aperture Z-scan technique with (632.8 nm) He-Ne laser wavelength were used to measure the nonlinearity of optical parameters, which included refractive index variation and extinction coefficient.