Optical Properties of Silver Aluminium Sulphide Ternary Thin Films Deposited by Chemical Bath Method

Abstract

Ternary thin films of Silver Aluminium Sulphide (AgAlS 2) have been prepared by chemical bath deposition techniques. Aqueous solution of 41.5 mls containing AgNO 3 , Al 2 (SO 4) 3 , thiourea and EDTA was used, where AgNO 3 , Al 2 (SO 4) 3 , thiourea were the source of Ag + , Al + and Srespectively and EDTA was used as a complexing agent. NaOH served as pH adjuster. The films were deposited at 300K of temperature. The deposited film properties were studied using a Janway UV-VIS spectrophotometer. From the spectral analysis of absorbance and transmittance, the optical and solid properties were obtained. The properties studied include the reflectance, absorption coefficient, thickness, refractive index, extinction coefficient, optical conductivity and band gap energy. The films show high absorbance in the UV

Optical Properties of Copper-Zinc Sulphide Network from Mixed Single Solid Source Precursors of Copper and Zinc Dithiocarbamates

“…This low value of the estimated reflectance is according to Uhuegbu et al [10] and Ezenwa and Okoli [15] for copper zinc sulphide thin films. The low reflective properties of the samples make the films good material for anti-reflective coatings [17]. The optical band gap (Eg) of the deposited films was estimated from Eq.…”

Activated Carbon and Metal Chalcogenide in Applied Materials Research

“…AgAlS 2 films have been produced using silver nitrate, aluminium sulphate, thiourea and EDTA (complexing agent). Film thickness increased from 0.03 µm to 0.52 µm in longer deposition time [59]. The obtained band gap values are in the range of 2.15 to 2.4 eV.…”