Original scientific paper
Preparation and optical properties of chemical bath deposited MnCdS2 thin films
F. I. Ezema
; Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria
R. U. Osuji
; School of General Studies, Natural Science Unit, University of Nigeria, Nsukka, Nigeria
Abstract
Thin films of MnCdS2 were deposited on glass slide from aqueous solutions of MnCl2·4H2O, CdCl2·2\frac12H2O and thiourea. Ammonium solutions and EDTA (or TEA) were employed as complexing agents. The optical characterization yielded band gap values in the range between 2.58 and 2.82 eV. Some of the films were found to have an average transmittance of greater than 60% in the UV-VIS regions while exhibiting high reflectance of greater than 12% in the same regions. Some of the films exhibit poor transmittance in the UV regions while exhibiting high transmittance of greater than 75% in the VIS-NIR regions. Hence, while some of the films could be effective as thermal coatings for cold climates, some could be effective as coatings against intensive sunlight as well good material for fabrication of solar cell.
Keywords
chemical bath deposition technique; MnCdS2; sunlight shielding; thermal coating; solar cells
Hrčak ID:
302510
URI
Publication date:
2.5.2007.
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