Effect of thickness on structural and optical properties of spin-coated nanocrystalline PbS thin films

Green Synthesis of Lead Sulphide Nanoparticles for High-Efficiency Perovskite Solar Cell Applications

“…It could be easily predicted that the film fabrication using the solution of higher concentration may be thicker than the film fabricated using lower concentration which leads to slightly better crystalline properties as seen in Table 2 and, consequently, the bandgap is reduced (as observed in Figure 6 c). Similar properties have also been reported by Vankhade and Chaudhuri [ 50 ] who studied details of thickness-dependent properties of spin-coated nano-crystalline PbS thin films. Using the ECOPIA 3000 Hall-Effect measurement system, the electrical characteristics of nano-crystalline PbS thin films prepared on a glass substrate were examined.…”

Charge carrier transport in PbS films doped with iodine

“…For the PbS(I) film on glass, the Raman spectra present bands at frequencies of 80 cm −1 (related to the vibrations of Pb atoms in PbS 39 ) and 130 cm −1 (related to the vibrations of S atoms in PbS), corresponding to the combination of longitudinal and transverse acoustic phonon modes (LA + TA) in PbS crystals, respectively. 39–42 Additionally, the Raman bands at 424 and 596 cm −1 related to the first and second overtones of 2LO and 3LO in PbS are detected in the spectra, respectively. The Raman peak located at 961 cm −1 is attributed to the formation of PbSO 4 during the interaction of the PbS film with oxygen.…”

“…38 The Raman bands detected on the PbS thin film on the glass almost completely coincide with the spectra of the glass substrate. However, an additional broad peak of low intensity at a frequency of 453 cm À1 , corresponding to the first overtone of the longitudinal optical (LO) phonon at the Brillouin zone center (2LO mode) of PbS vibrations, [39][40][41][42] and a weak peak at a frequency of 512 cm À1 are also observed.…”

The influence of iodide addition on the composition, morphology, crystal structure, and semiconductor and photoelectric properties of PbS films

“…The Raman spectrum of the PbS film indicates the presence of seven vibrational active Raman modes centered near 72, 134, 179, 275, 433, 600, and 964 cm À1 . [45][46][47] For the highly symmetrical cubic B1 structure (Fm% 3m sp. gr.)…”