Characterization of PbS nanoparticles synthesized by chemical bath deposition

Journal of Alloys and Compounds (Impact Factor: 3). 09/2009; 484(1-2):463-466. DOI: 10.1016/j.jallcom.2009.04.127

ABSTRACT Lead sulfide (PbS) nanocrystallites have been successfully synthesized using chemical bath deposition (CBD) method. The films were deposited by ion by ion mechanism on glass substrate, which were finally characterized for structural and optical properties. The average particle size calculated by XRD is found to be 40 nm. The optical band gap is found to be 2.0 ± 0.1 eV which is higher than the bulk. SEM micrographs show that spherical nanoparticles are formed.

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Available from: Diwaker Kumar, Sep 26, 2015
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    • "Among the IV-VI semiconductors, PbS thin films have been used in a lot of applications, including electronic and optoelectronic devices [1] [2] [3]. PbS is an important direct narrow gap semiconductor material with band gap energy of 0.4 eV and has a cubic lattice with unit cell face center cube [4] [5] [6]. "
    • "We found that E_g decreased from 2.2 to 1.2 eV as deposition time was increased due to the increase in particle sizes. This finding concurs with those of other authors [3] [4] . The variation in E_g in relation to deposition time is summarized in Table 2. "
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    ABSTRACT: Nanocrystalline lead sulifed (PbS) thin films have been successfully deposited on glass substrate from lead acetate (Pb2+ ions) and thiourea (S2- ions) precursors using microwave-assisted chemical bath deposition technique (MACB). The effect of deposition time (30, 60, 90 and 120 min) on the structure and microstructure evolution and the corresponding variation of the optical properties of the as-prepared films were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Vis spectrophotometer. XRD analysis shows that all thin films are polycrystalline and crystallize within a cubic rock salt (NaCl) type structure.The surface morphology studied using scanning electron microscopy (SEM) showed that the films have uniform surface morphology over the entire substrate and were of good quality. Images revealed that the particle size increased with increasing of the deposition time, thus confirming XRD results. Energy gap Eg decreases as the deposition time increased.
    International Conference on Education, Applied Sciences and Management (ICEASM'2012) December 26-27, 2012 Dubai (UAE); 12/2012
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    ABSTRACT: Nanocrystalline PbS powders and nanostructured PbS films have been produced by different deposition procedures. According to scanning and transmission electron microscopy results, the average size of PbS particles in the nanopowders is 8 to 20 nm, and the average grain size in the nanofilms is 40 to 80 nm. As shown by electron diffraction, the nanocrystalline PbS powders have the B1 structure (sp. gr. Fm-3m).
    Inorganic Materials 01/2011; 48(1). DOI:10.1134/S002016851201013X · 0.56 Impact Factor
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