Effect of Molarity on Structural and Optical Properties of Chemically Deposited Nanocrystalline PbS Thin Film

Sarma, M.P.; Wary, G.

doi:10.18052/www.scipress.com/ilcpa.74.22

Cited by 13 publications

(5 citation statements)

References 19 publications

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“…As shown in Table, observed d values for the sample are smaller than the standard d values. Similar result has been observed in the literature [27].…”

Section: Resultssupporting

confidence: 93%

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CHARACTERIZATION OF PbS FILM PRODUCED BY CHEMICAL BATH DEPOSITION AT ROOM TEMPERATURE

Kul¹

2019

Anadolu Üniversitesi Bilim Ve Teknoloji Dergisi - B Teorik Bilimler

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PbS film has been produced by chemical bath deposition (CBD) method onto glass substrates using aqueous solution containing Pb(NO3)2, Na2SO3, NaOH and SC(NH2)2. The deposition was carried out at room temperature of 26°C and a stirring speed of 60 rpm for an hour. The PbS film has been characterized by x-ray diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy and optical absorption spectroscopy techniques. The PbS film is polycrystalline face centered cubic phase having randomly preferential orientation in the [101], [200], [220] and [400] directions. The texture coefficient, lattice parameter, strain, crystallite size, and dislocation density were estimated from x-ray diffraction results. Fourier transform infrared result reveals that the presence of PbS and various functional groups in PbS sample. Raman spectrum of the sample shows PbS phase and lead oxysulfates. The optical band gap of the PbS film has been studied using the optical absorbance measurement as a function of wavelength between 200 and 2750 nm. The optical direct band gap of the sample is calculated to be 1.28 eV. The optical band gap of PbS sample exhibited a blue-shift compared with that of bulk PbS.

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“…As shown in Table, observed d values for the sample are smaller than the standard d values. Similar result has been observed in the literature [27].…”

Section: Resultssupporting

confidence: 93%

“…In this analysis, eight reflections from the cubic PbS structure were considered. Results are presented in [27].…”

Section: Resultsmentioning

confidence: 99%

CHARACTERIZATION OF PbS FILM PRODUCED BY CHEMICAL BATH DEPOSITION AT ROOM TEMPERATURE

Kul¹

2019

Anadolu Üniversitesi Bilim Ve Teknoloji Dergisi - B Teorik Bilimler

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“…It is observed that as deposition time increases optical band gap is reduced even though variation is not noticeable. The observed bandgap is in agreement with reported values [25,29].…”

Section: Optical Studiessupporting

confidence: 92%

“…This implies that lattice strain in PbS-2 film restricts the increase in particle size at the grain boundaries. Meanwhile the lower value of strain and high intensity in diffraction pattern for PbS-3 is indicative of the increased thickness with deposition time which comes in agreement with reported results [22,25].…”

Section: Structural Characterizationsupporting

confidence: 91%

Effect of Deposition Time on Structural and Optoelectronic Properties of Flower-Like Nanostructured PbS Thin Films

Sheeba¹,

Namitha²,

Ramsiya³

et al. 2021

J. Sci. Res.

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Polycrystalline nanostructured PbS thin ﬁlms are deposited onto soda-lime glass substrates by the method of chemical bath deposition (CBD) at different duration of deposition time. The structure and surface morphology of the ﬁlms are characterized by X-ray diﬀraction (XRD) and field effect scanning electron microscopy (FE-SEM). XRD pattern exhibits polycrystalline structure with preferential orientation along (200) direction, parameters such as crystallite size, lattice constant, lattice-strain and dislocation density are calculated. The FE-SEM images show appearance of flower like structure on formation of PbS films which is indicative of suitability in gas sensing applications. Studies on optical properties carried out by UV-Vis spectroscopy measurements show bandgap in the range 1.65eV – 1.41eV. The photoluminescence spectra of the films exhibit two peaks centered at around 613 nm and 738 nm after excitation at 450 nm. Electrical studies from Hall measurements indicate the carrier concentration and mobility of the PbS samples corroborate the variations in the conductivity.

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“…As the solution concentration increases, more Cu and O atoms in the surface substrate are precipitated and they experience more interactions which contributes to an enlargement of the crystallites and leads to bigger grains and subsequently the enhancement of film's crystallinity [27]. Furthermore, the lattice defects along the grain boundaries are reduced due to the increase of crystallites size, which may lead to decreasing strain and dislocation densities [28], as seen in Table 1. The minimum values of δ and strain ԑ are found to be 3.1 × 10 10 line/cm 2 and 6.13 × 10 −4 respectively at solution molarity of 0.1 mol/L.…”

Section: Structural Propertiesmentioning

confidence: 99%

Optoelectronic and Dielectric Properties of Tenorite CuO Thin Films Sprayed at Various Molar Concentrations

Ben Messaoud,

Ouahab,

Rahmane

et al. 2024

Period. Polytech. Chem. Eng.

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The work in hand presents the elaboration of CuO thin films using a home-made spray pyrolysis technique at room atmosphere. The films were synthesized on preheated glass substrate at 450 °C. The source solution molarity was varied from 0.025 to 0.1 mol/L. The films were characterized by employing X-Ray Diffraction technique, UV-Vis-NIR spectrophotometry, Scanning Electron Microscope imagery, Energy Dispersive Spectroscopy, and four-points probe techniques. The X-ray diffraction analysis confirmed that all films are polycrystalline with a preferred orientation along the plane (−111) of the monoclinic crystal structure phase of tenorite (CuO). The SEM images showed a homogeneous and smooth surface. Crystallinity and grain size were improved. The rise of solution concentration induced a reduction of transmittance and reflectance in the visible region. The energy gap, the absorption coefficient, the extinction coefficient, refractive index, dielectric constant (ԑr and ԑi) and loss energy were estimated from transmittance and reflectance data. The gap energy decreases from 2.72 to 2.56 eV. The film deposited for 0.025 mol/L exhibits the highest real part of the dielectric constant (ԑr ~ 17). The film resistivity which is in order of 102 Ω cm decreases with the increase of molar concentration. The estimated dielectric constant indicated that the resulting CuO thin films could be used as dielectric layers for optoelectronic devices working in Vis-NIR region of radiation. Furthermore, the relatively high band gap, high absorption coefficient and high conductivity of the film obtained at 0.075 mol/L, make them good candidates as absorption layers in solar cells applications.

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Effect of Molarity on Structural and Optical Properties of Chemically Deposited Nanocrystalline PbS Thin Film

Cited by 13 publications

References 19 publications

CHARACTERIZATION OF PbS FILM PRODUCED BY CHEMICAL BATH DEPOSITION AT ROOM TEMPERATURE

CHARACTERIZATION OF PbS FILM PRODUCED BY CHEMICAL BATH DEPOSITION AT ROOM TEMPERATURE

Effect of Deposition Time on Structural and Optoelectronic Properties of Flower-Like Nanostructured PbS Thin Films

Optoelectronic and Dielectric Properties of Tenorite CuO Thin Films Sprayed at Various Molar Concentrations

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