Simple chemical reduction route is taken for growth of PbS nanostructure by using ethylene-diamine (EDA) as capping agent. Anhydrous lead chloride, sulphur, NaBH4 is taken as reactants. Different types of nanostructures are obtained by varying growth time and temperature. The room temperature synthesis of PbS nanoparticles in EDA medium produces high quality nanocrystals as shown by electron microscopy, optical and fluorescence measurements. It is observed that nanoparticles are larger in size for longer growth time as well as higher temperature. Structural and optical properties show that quantum confinement of PbS nanoparticles is good in EDA medium.

Natural dye-sensitized solar cells were fabricated based on differently shaped Lead Sulfide nanoparticles in a simple cost-effective way. The grown PbS nanoparticles were characterized by TEM, XRD, Optical Absorption, and Photoluminescence study. The natural dye-sensitized solar cell was fabricated using a kind of dye from Clitoria ternatea as a sensitizer. The current-voltage data of the dye-sensitized solar cell was taken under dark and light illuminated conditions. The dye-sensitized solar cell efficiency was measured and the ideality factor, fill factor were also found out. The open-circuit voltage and short circuit current density of the dye-sensitized solar devices based on three different shaped PbS nanoparticles are also obtained and compared.