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Growth characteristics and effect of thickness on optical properties of iron copper sulphide (FeS2CuS3) thin films
FI Ezema
Department of Physics & Astronomy, School of General Studies, Natural Science Unit, University of Nigeria, Nsukka, Nigeria
MN Nnabuchi
Department of Industrial Physics, Ebonyi State University, Abakiliki, Ebonyi State, Nigeria
Abstract
Thin films of iron copper sulphide (FeS2CuS3) were produced by chemical bath deposition technique on glass substrate. The optical and electrical properties of the films were investigated using ultraviolet-visible spectrophotometer and Fourier transforms infrared spectrometer. The energy band gap of the film ranged between 1.80 - 2.10 eV, which fell within the band gaps of Cu2S and FeS2 thin films. The thickness and electrical conductivity of the films ranged between 3.96 - 4.18 μm and 3.57 x 102 - 4.04 x 102 W-1m-1 respectively. There was a corresponding decrease in thickness with electrical conductivity. The optical transmittance of the films decreased with increased film thickness. Since the average transmittance of film was greater than 45 % in the ultraviolet-near infrared regions and exhibited poor transmittance in the ultraviolet regions, the thin films of FeS2CuS3 could be used for solar cell fabrication and as effective coatings for poultry houses.
Journal of Applied Science and Technology Vol. 10(1&2) 2005: 53-59
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