Annealing effect on the optical and solid state properties of cupric oxide thin films deposited using the Aqueous Chemical Growth (ACG) method — Oak Academic Publishing
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Annealing effect on the optical and solid state properties of cupric oxide thin films deposited using the Aqueous Chemical Growth (ACG) method
Department of Science Laboratory Technology, School of Applied Sciences, Rivers State Polytechnic, Bori, Nigeria;
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Department of Physics, Faculty of Science, Rivers State University of Science and Technology, Port Harcourt, Nigeria;
,
Department of Physics, Faculty of Science, Rivers State University of Science and Technology, Port Harcourt, Nigeria;
,
Federal College of Education, Obudu, Nigeria
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Department of Physics and Astronomy, Western University—Canada, London, Canada;
,
Department of Physics and Astronomy Faculty of Science, University of Nigeria, Nsukka, Nigeria;
1 Department of Science Laboratory Technology, School of Applied Sciences, Rivers State Polytechnic, Bori, Nigeria;
2 Department of Physics, Faculty of Science, Rivers State University of Science and Technology, Port Harcourt, Nigeria;
3 Department of Physics, Faculty of Science, Rivers State University of Science and Technology, Port Harcourt, Nigeria;
4 Federal College of Education, Obudu, Nigeria
5 Department of Physics and Astronomy, Western University—Canada, London, Canada;
6 Department of Physics and Astronomy Faculty of Science, University of Nigeria, Nsukka, Nigeria;
Thin films of CuO having an average thickness of 720 nm were deposited on clean glass substrates using the Aqueous Chemical Growth (ACG) method with Cu(NO 3 ) 2 and C 6 H 12 N 4 as precursors and annealed at different temperatures in order to determine the effect of annealing temperature on their optical and solid state properties. The study was carried out using Rutherford Backscattering (RBS) spectroscopy for t thickness and chemical composition, X-Ray Diffraction (XRD) for crystallographic structure and a UV-VIS spectrophotometer for spectral analysis. The results indicate that the absorbance and absorption/extinction coefficient of the films vary inversely with annealing temperature while the transmittance, reflectance, direct band gap, real/imaginary dielectric constants and refractive index vary directly with annealing temperature. The results further indicate an im provement in crystallinity as annealing temperature increases. The as-deposited and annealed ACG CuO thin films were found to be suitable for use as window layer in solar cells among other electronic and optoelectronic applications.
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