Preparation and characterization of PbSSe nanomaterials for electronic and photovoltaic applications

Abstract

• Lead sulphide and lead selenide powdered nanomaterials were prepared by three-neck hot injection method. • The prepared powdered nanomaterials were identified by X-ray diffraction, EDAX and HRTEM study. • PbS and PbSe quantum dot thin films of different thicknesses have been prepared by thermal evaporation technique. • PbSxSe1-x (x ranges from 0 to 1) thin films were obtained by co-evaporation of PbS and PbSe from two sources, one of them is molybdenum boat containing PbS nanomaterials and the other boat contain PbSe nanomaterials. • The effect of film thickness on The structural, optical, electrical, properties were investigated. • The structural properties were studied through the XRD, EDAX and HRTEM study. • From XRD study the lattice parameters, the particle size, the dislocation density and the microstrain were determined for PbS, PbSe and their ternary PbSxSe1-x films. • From the TEM results, all the studied films consist of quantum dots as detects from their crystallite size. • The effect of film thickness increase on all the structural parameters were studied as a function of composition for PbSxSe1-x films (x = 0 to 1.0). • As the film thickness increases the particle size increases but the dislocation density and the microstrain decreases.