The growth of nanocrystalline PbS films by chemical bath deposition (CBD) onto glass at a deposition temperature of 20 ± 2 °C is reported. Different doping levels were obtained by changing the volume of the reagent ...
详细信息
The growth of nanocrystalline PbS films by chemical bath deposition (CBD) onto glass at a deposition temperature of 20 ± 2 °C is reported. Different doping levels were obtained by changing the volume of the reagent solution V[Ni2+] into the PbS growing solution were added. X-ray diffraction (XrD), Transmssion Microscopy Electronic (TEM), raman spectroscopy (rS), dark conductivity (DC) measurements was carried out to characterize the PbS films. XrD spectra displayed peaks at the angular positions: 2θ = (26.00, 30.07, 43.10, 51.00, 53.48), indicating growth on the zinc blende face. The grain size (GS) determined by x-rays diffraction of the undoped samples, was found to be ~36 nm, whereas with the doped sample is found to be in the range ~32-5 nm, as calculated by employing Scherer"s formula. By TEM, the doped-PbS materials were found crystalline films in the range 3.5-5 nm. rS exhibited band centred at ~135 cm-1 displaying only a PbS ZB structure, excluding the presence of any other material. The thermal energy for the films was determined from the slope of DC and the energy was estimated to be 0.15 to 0.5 eV. Finally, Gibbs free energy calculation for the V[Ni2+] doping-PbS process was also established.
暂无评论