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- W2186175119 abstract "Five thin films of calcium sulphide (CaS) were deposited on micro -slides using solution growth techniques. The bath compositions include: calcium sulphate (CaSO4), sodium thiosulphate (Na2S2O3.5H2O), distilled water and ethylene diamine tetra acetic acid (EDTA), which served as a complexing agent. The films were deposited at different bath parameters, which include molarity of solution, volume of solution and water, time of deposition, and pH. The absorbance of the films was measured using a PYE-UNICAM SP8-100 model spectrophotometer. Transmittance , reflectance, absorption coefficients, energy bandgap, refractive index, extinction coefficient, dielectric constant, and optical conductivity were calculated. The transmittance percentage of the films was measured with Fourier Transform Infrared (FTIR) Spectroscopy, and a spectrophotometer. Light microscopes (HUNDWETZLAR H600) and cameras (RICOH 35mm SLR, XR – X300) were used to examine and produce micrographs of the samples at magnification s of X400, while energy dispersive X-ray fluorescence (EDXRF) was used to determine the elemental composition of the films. The optical and solid-state characteristics revealed that films of calcium sulphate (CaS) have a low absorbance (~ 0.01 – 0.04), high transmittance (~ 70 – 99%), and low reflectance range (~ 1 – 15%) throughout the ultraviolet, visible, and infrared regions. The range of the thickness (t) of the films is ( ~ 2.64 – 2.98μm), and the refractive index (n) is ~ 1.37 – 1.43. Other values are optical conductivity (σop) ~ 1.71 x 10 12 (S -1 )–2.11 x 10 12 (S -1 ); extinction coefficient (K) ~ 2.10 x 10 -3 –2.40 x 10 -3 ; absorption coefficient (α) ~ 0.05 x 10 6 –0.06 x 10 6 (m -1 ); and energy bandgap (Eg) ~ 3.90 – 4.10eV. From the above results one can observe that CaS is suitable for use as a photosynthetic material and window coating." @default.
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- W2186175119 date "2004-01-01" @default.
- W2186175119 modified "2023-09-26" @default.
- W2186175119 title "Characterization of Optimized Grown Calcium Sulphide Thin Films and their Possible Applications in Solar Energy" @default.
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