FIZIKA A 16 (2007) 2 , 107-116

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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: fiezema@yahoo.com
bSchool of General Studies, Natural Science Unit, University of Nigeria, Nsukka, Nigeria
E-mail address: uzosuji@yahoo.com

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 MnCl24H2O, CdCl22\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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