Effect of Concentration on the Optical and Solid State Properties of ZnO Thin Films Deposited by Aqueous Chemical Growth (ACG) Method

Thin films of Zinc Oxide (ZnO) having different concentrations were deposited using the Aqueous Chemical Growth (ACG) method. The films were characterized using Rutherford Back Scattering (RBS) spectroscopy for chemical com- position and thickness, X-Ray Diffraction (XRD) for crystallographic struct...

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Bibliographic Details
Published in:Journal of modern physics 2012-09, Vol.3 (9), p.947-954
Main Authors: Mammah, S. L., Opara, F. E., Sigalo, F. B., Ezugwu, S. C., Ezema, F. I.
Format: Article
Language:English
Subjects:
Deposition
Optical properties
Reflectance
Solid state
Thin films
Titanium dioxide
Transmittance
Zinc oxide
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Summary:Thin films of Zinc Oxide (ZnO) having different concentrations were deposited using the Aqueous Chemical Growth (ACG) method. The films were characterized using Rutherford Back Scattering (RBS) spectroscopy for chemical com- position and thickness, X-Ray Diffraction (XRD) for crystallographic structure, a UV-VIS spectrophotometer for the analysis of the optical and solid state properties which include spectral absorbance, transmittance, reflectance, refractive index, direct band gap, real and imaginary dielectric constants, absorption and extinction coefficients and a photomi- croscope for photomicrographs. The average deposited film thickness was 100 nm. The results indicate that the values of all the optical and solid state properties investigated vary directly with concentration except transmittance which is the reverse. Thus, the optical and solid state properties of ZnO thin film deposited by the Acqueous Chemical Growth method can be tuned by deliberately controlling the concentration of the precursors for various optoelectronic applica- tions including its application as absorber layer in solar cells.
ISSN:2153-1196
2153-120X
DOI:10.4236/jmp.2012.39124