Chemical bath deposition of PbS nanocrystals: Effect of substrate

Gaiduk, Alex P.; Гайдук, П. И.; Larsen, A. Nylandsted

doi:10.1016/j.tsf.2007.06.122

Cited by 68 publications

(30 citation statements)

References 11 publications

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“…Deposited films using lead acetate (at the same PH) (18), shows much lower deposition rate comparing to the lead nitrite. Nucleation stage in the present work (of film deposited on glass substrate) is greater than those obtained with Si substrate using lead nitrite (17), this could be attributed to the high concentration of the reactive centers in the glass substrate since the CBD process can be controlled by the number active sites in the substrate surface [22].…”

Section: Volume 34contrasting

confidence: 52%

“…They even offer an opportunity for a 'do-ityourself' approach to the production of device and coating [16]. Nanocrystalline PbS layers have been deposited chemically on different substrates (17,18). We have investigated here the role of deposition parameters in the most common method of synthesis PbS nanocrystals deposited on glass substrate …”

Section: Introductionmentioning

confidence: 99%

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Effect of Deposition Parameters on Kinematics Growth and Optical Properties of PbS Nano Films Deposited by Chemical Bath Deposition

Mousa

Hassen

Mohmoed

2014

ILCPA

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The paper presents a study regarding the kinetic of chemical bath deposition (CBD) PbS nano films. Nano films were deposited from chemical bath containing thiourea, lead nitrite, and ammonia. The deposition kinematics and optical investigations have been performed to compare the properties of the films grown with different precursor solutions. We are able to determine the growth rate as a function of the synthesis conditions and it was found that the growth rate of deposited nano layer affected significantly by synthesis conditions. The main characteristic of nano films is the band gap. This parameter determined from spectroscopy Measurements of transmission, in the energy range of 240-840 nm is influenced by many factors such as deposition time, bath temperature, pH value of the path and molar concentration of the reactants.

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Section: Volume 34contrasting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Effect of Deposition Parameters on Kinematics Growth and Optical Properties of PbS Nano Films Deposited by Chemical Bath Deposition

Mousa

Hassen

Mohmoed

2014

ILCPA

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“…The E g for doped samples in the 2.4-3.8 eV range the large experimentally observed E g in the nanoparticle films theoretically estimated (using Vegar ds law) E g for bulk shows the extent of quantum size effect in the nanoparticle films. The fundamental optical transition of doped films (E g = 0.41 eV) is not observed in these films, presumably because of complete mixing of PbS with Ni 2+ affording a unique ternary intermetallic compound of the Pb x Ni 1−x S type [1]. It is observed that the size effect on the optical bandgap is stronger in nanoparticle films than in PbS nanoparticle of 24-10 nm (average crystallite size) and shows an E g : 2.22-2.65 eV [2].…”

Section: Resultsmentioning

confidence: 96%

“…The interest into deposition of ternary derivative materials, the potential of designing and tailoring both the lattice parameters and the forbidden bandgap energy (E g ) by controlling growth parameters [1,2] has grown. In this regard, many techniques have been successfully employed: successive ionic layer and reaction (SILAR) [3], sol gel methods [4], and so forth.…”

Section: Introductionmentioning

confidence: 99%

Properties of PbS: Ni²⁺ Nanocrystals in Thin Films by Chemical Bath Deposition

Moreno

Lima

Portillo

et al. 2012

ISRN Nanotechnology

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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 2θ = [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.

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“…The band gap of PbS can be easily adjusted 44 up to a few electron volts when the size of the particles is reduced. 45 Such a significant widening of the band gap is associated with small 46 effective masses of electrons and holes (m e = m h = 0.09m 0 ) as well 47 as with a large exciton Bohr radius (20 nm) of PbS [1]. Nanomateri-48 als of PbS have been discovered to have exceptional third-order 49 nonlinear optical property with potential applications in optical 50 devices such as optical switches [2].…”

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confidence: 99%