Properties of PbS: Ni2+ Nanocrystals in Thin Films by Chemical Bath Deposition. (16th August 2012)

• Record Type: Journal Article
• Authors: Portillo Moreno, O.; Chaltel Lima, L. A.; Chávez Portillo, M.; Rosas Castilla, S.; Zamora Tototzintle, M.; Abarca Ávila, G.; Gutiérrez Pérez, R.
• Other Names: Beltsios K. G. Academic Editor.; Song Y. Academic Editor.
• Is Part Of: ISRN nanotechnology. Volume 2012(2012)
• Publication Date: 2012-08-16
• Subjects: Nanotechnology -- Periodicals; Nanotechnology; Nanotechnology; Electronic journals; Periodicals; Electronic journals; 620.5
• DOI: 10.5402/2012/546027
• Languages: English
• ISSNs: 2090-6064

Abstract

Abstract : The growth of nanocrystalline PbS films by chemical bath deposition (CBD) onto glass at temperature T = 20 ± 2 ∘ C is presented in this research. We report on the modification of structural, optical, and electrical nanostructures due to in situ Ni-doping. The morphological changes of the layers were analyzed using SEM, AFM, and TEM. XRD spectra displayed peaks at 2 θ = [26.00, 30.07, 43.10, 51.00, 53.48], indicating growth on the zinc blende face. The grain size determined by X-rays diffraction of the undoped samples was ~ 36 nm, whereas with the doped sample was 3.2–5 nm. By TEM, the doped PbS was found crystalline films in the range 3.5–5 nm. Optical absorption (OA), and forbidden bandgap energy ( E g ) shift disclose a shift in the range 2.1–3.8 eV. Likewise, the dependence of E g with the radius size and interplanar distance of the lattice is discussed. Raman spectroscopy (RS) exhibited an absorption band ~ 135 cm −1 displaying only a PbS ZB structure. The thermal energy for the films was determined from the slope of dark conductivity (DC) and the energy was estimated to be 0.15 to 0.5 eV.