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Room Temperature Two-Step Synthesis of Cadmium Telluride Films
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Volume 1, 2014
Issue 2 (June)
Pages: 11-17   |   Vol. 1, No. 2, June 2014   |   Follow on         
Paper in PDF Downloads: 34   Since Aug. 28, 2015 Views: 1545   Since Aug. 28, 2015
Magdalena Osial, Laboratory of Electrochemistry, Department of Chemistry, University of Warsaw, Pasteur 1, 02-093 Warsaw, Poland.
Justyna Widera, Department of Chemistry, Adelphi University, 1 South Avenue, NY 11530 Garden City, United States.
Krystyna Jackowska, Laboratory of Electrochemistry, Department of Chemistry, University of Warsaw, Pasteur 1, 02-093 Warsaw, Poland.
CdTe films were prepared at room temperature by using two-step method. In the first step, Cd layer was deposited electrochemically on Pt substrate and in the second step, CdTe films were formed chemically by dipping substrate covered with Cd into the solution containing telluride ions. The properties of deposited CdTe films were investigated. Using XRD method, it was found that the formed CdTe films are polycrystalline with cubic structure. Raman and XPS spectra revealed that deposits contain not only CdTe but also some amount of TeO2 and probably CdO or Cd(OH)2, as well. The optical band gap energy determined using UV-Vis spectra was in the range of 1.4-1.6 eV depending on the length of time of Cd deposition. The changes in deposited films photoactivity under illumination in the telluride solution indicated the formation of n-type of CdTe films.
Cadmium Telluride, Thin Films, Two-Step Method, Crystallinity, Chemical Composition, Morphology
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