Effect of Fe substitution on optical, electrical, electrochemical and dielectric properties of (Zn, Fe)S chalcogenide pellets

Thermoelectric measurements indicate p-type conductivity in agreement with the results obtained by electrochemical analysis. The flat band potential Vfb has values 2.94 V (x=0.18) and 2.66 V (x=0.4) as obtained by Mott-Schottky plot. Similarly the optical band gap was found to decrease with increase in Fe concentration.