Studies on Structural, Morphological and Optical Properties of Chemically Deposited CdS(1-x)Se(x) Thin Films

J Fluoresc. 2016 Mar;26(2):459-69. doi: 10.1007/s10895-015-1732-9. Epub 2015 Dec 3.

Abstract

The thin films of CdS(1-x)Se(x) were successfully deposited over glass substrates by chemical bath deposition technique. Cadmium acetate, thiourea and sodium selenosulfate were used as source materials for Cd(2+), S(2-) and Se(2-) ions, while 2-mercaptoethanol was used as capping agent. The various deposition conditions such as precursor concentration, deposition temperature, pH and deposition time were optimized for the deposition of CdS(1-x)Se(x) thin films of good quality and the films were annealed at 200° and 300 °C. The structural, morphological, chemical and optical properties were examined by various characterization techniques and discussed in detail. The optical band gap of CdS(1-x)Se(x) thin film samples were estimated and found in the range from 2.11 to 1.79 eV for as-deposited and annealed thin films.

Keywords: 2-ME; Annealing; Cadmium sulfoselenide; Optical properties; SEM; XRD.