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FIZIKA A 16 (2007) 2 , 107-116
 
PREPARATION AND OPTICAL PROPERTIES OF CHEMICAL BATH DEPOSITED MnCdS2 THIN FILMS
F. I. EZEMAa,b and R. U. OSUJIa
aDepartment of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria
E-mail address: [email protected]
bSchool of General Studies, Natural Science Unit, University of Nigeria, Nsukka, Nigeria
E-mail address: [email protected]
Received 30 December 2005; Accepted 5 September 2007
Online 8 February 2008
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.
PACS numbers: 78.66.-w, 68.55.-a
UDC 539.23, 538.975
Keywords: chemical bath deposition technique, MnCdS2, sunlight
shielding, thermal coating, solar cells
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