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Spray pyrolysis deposition and effect of annealing temperature on urbach energy and dispersion parameters of Cu:NiOfilm

Author(s): Khalid Haneen Abas

Spray pyrolysis method that used to prepare Cu:NiO thin films onto glass substrate with various annealing temperature. Spectral absorbance of prepared thin films determined by UV-Visible spectrophotometer in the range of 380-900 nm. The absorbance increased with increasing annealing temperature until 550 nm, and then don’t change at the wavelength greater than 550 nm. While the reflectance, real and imaginary dielectric constant, and optical conductivity decreased with increasing annealing temperature until 550 nm. Dispersion parameters that studied decreases with increasing annealing temperature, while the Urbach energy increased with increasing annealing temperature.

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