Determination of Electronic and Optical Properties in Lead Chalcogenides Ternary Alloy Using Quantitative Approach

Abstract

Size and composition dependence of optical properties in alloyed semiconducting compounds is drawing the attention of researchers from past years. In the present paper; the author has studied the effect of alloying on the energy bandgap, refractive index and dielectric constant energy with variation in composition in ternary alloy of lead chalcogenides. Also, the impact of size reduction and dimension on band gap energy in lead chalcogenides is studied using a quantitative approach. The optical and electronic properties of semiconductor nanocrystals are found to vary with dimension and size. Ternary semiconducting homogeneous alloy of IV-VI group viz. PbSexS1-x is considered for studying the composition impact on electronic and optical properties. The study provides an insight of the effect of composition on the energy bandgap, refractive index and dielectric constant of PbSexS1-x and give the possibility of tuning these properties of materials based on demand. The model predications are observed in favorable agreement with the available experimental and stimulated data.