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


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,
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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]. "

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    • "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 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).
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