Influence of low energy (keV) negative Li ion implantation on properties of electrochemically induced scaffold-based growth of PbSe nanowires

摘要： In the present work, PbSe nanowires were synthesized using restrictive template-based electrodeposition technique and implanted under vacuum with 200 keV negative Li ion at different fluences. The morphology of the nanowires was characterized by field emission scanning electron microscopy (FESEM). X-ray diffraction patterns confirmed the same crystal structure for pristine and ion implanted samples besides change in intensity of diffraction peaks were observed. Crystallite size was evaluated using modified Scherrer method and Williamson–Hall methods (UDM and USDM). Stress, strain, stacking fault, dislocation density and lattice parameters were evaluated for the pristine and ion implanted samples. UV–Vis spectroscopy results showed decrease in optical bandgap with increasing ion fluence. Photoluminescence spectra manifested decrease in emission peak with increasing ion fluence. The I–V graphs of the nanowires depicted space charge limiting current (SCLC) characteristics at higher voltage. An increase in current was observed with increase in ion fluence due to increase in free charge carriers.