Study Optical Properties of Copper and Silver for Astronomical Solar Filters Prepared by DC Sputtering Plasma

Study Optical Properties of Copper and Silver for Astronomical Solar Filters Prepared by DC Sputtering Plasma

Citation

S. M. Abd Al Kareem and W. I. Yaseen, 2020, 'Study Optical Properties of Copper and Silver for Astronomical Solar Filters Prepared by DC Sputtering Plasma', IOP Conference Series: Materials Science and Engineering, 757(1), 012054. doi:10.1088/1757-899X/757/1/012054.

Keywords

  • Astronomical solar filter
  • Optical properties
  • Copper
  • Silver
  • DC sputtering plasma
  • Glass substrates
  • Transmittance
  • Absorbance
  • Refractive index
  • Absorption coefficient
  • Optical energy gap (Eg)
  • UV-Visible spectrophotometer
  • Sputtering power
  • Thin films (implied by "coated layers")
  • Wavelength

Brief

This study presents the DC sputtering plasma technique for preparing copper and silver astronomical solar filters on glass substrates and investigates their optical properties, including transmittance, absorbance, refractive index, absorption coefficient, and optical energy gap.

Summary

This study focuses on the preparation of copper and silver astronomical solar filters on glass substrates using the DC sputtering plasma technique at room temperature. It investigates the effect of film thickness (110-230 nm for copper, 230-400 nm for silver) and sputtering power (25 and 50 W) on the optical properties of these filters, which were analyzed using a UV-Visible spectrophotometer. The study found that the transmittance of the coated layers increases with wavelength (350-750 nm), while absorbance decreases at short wavelengths corresponding to the energy gap. The optical band gap values were found to be between 2 and 2.6 eV. The researchers also determined the refractive index and absorption coefficient of the prepared filters under different conditions. In conclusion, the study successfully deposited copper and silver astronomical solar filters using DC sputtering and characterized their optical properties, noting their dependence on sputtering power.

Origin: https://sci.bban.top/pdf/10.1088/1757-899x%252F757%252F1%252F012054.pdf#

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