Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 516, Issue -, Pages 20-26Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.11.054
Keywords
Copper sulfide; Amorphous thin film; Optical properties; CBD
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Funding
- Erciyes University [FBA-10-3223]
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Amorphous copper sulfide thin films were deposited on commercial glass substrates at room temperature by chemical bath deposition. The effect of the pH value of the chemical bath on the optical properties of the amorphous thin films is investigated and discussed. The influence of the pH value of the chemical bath was examined by means of the optical transmission of the thin films in the wavelength range of 300-1100 nm taken at room temperature. Next, using these data, the absorption coefficient, the optical band gap value, the extinction coefficient, the refractive index, and the real and imaginary parts of the dielectric constant were calculated. The dispersion of the refractive index of the thin films was also investigated in terms of the single-oscillator Wemple and DiDomenico method. The value of the optical band gap determined by Tauc's extrapolation was found to be equal to one and half times the oscillator energy values of all deposited films. (C) 2011 Elsevier B.V. All rights reserved.
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