Effect of Al incorporation on the structural, morphological, optoelectronic and transport properties of PbS thin films

Preetha, K. C.; Remadevi, T. L.

doi:10.1016/j.physb.2012.06.044

Cited by 44 publications

(19 citation statements)

References 18 publications

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“…Sn and Sb doping of PbS thin films can significantly change band gap values [24,25]. The increases in the electrical conductivity of PbS films are due to interstitially doped Al atoms that act as donor impurities [26,27]. Mn, Cd and co-doped PbS nanocrystals have also been investigated [28].…”

Section: Introductionmentioning

confidence: 99%

Preparation of nanocrystalline Cd-doped PbS thin films and their structural and optical properties

Rajathi¹,

Kirubavathi²,

Selvaraju³

2017

Journal of Taibah University for Science

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PbS and Cd-doped PbS nanocrystalline thin films prepared by the chemical bath deposition technique was deposited onto glass substrates at 80 • C. The aqueous solution containing Cd 2+ and Pb 2+ precursors was used to obtain good quality film deposits at optimized preparative parameters. The characterization of these films was performed using X-ray diffraction, optical absorption, photoluminescence properties, scanning electron microscopy and energy dispersive X-ray analyses to explore the properties of the PbS and Cd-doped PbS films. The prepared films were adherent to the substrate and well crystallized according to the cubic structure, which displayed a preferred orientation. According to the X-ray diffraction analysis, the crystallite size of the films decreased from 74 nm to 64 nm with increasing Cd doping. The optical properties were determined from ultraviolet-visible spectroscopy measurements in the absorbance energy range from 300-1200 nm. The UV-visible analysis shows that the band gap value of the PbS thin films increased from 2.12 eV to 2.65 eV by doping with Cd. Morphological analysis showed that the shape of the grains over the substrate surface was changed from a regular random orientation to an irregular shape with Cd doping. The energy dispersive X-ray analysis showed that the film contains Cd, Pb and S elements without any other impurities.

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Section: Introductionmentioning

confidence: 99%

Preparation of nanocrystalline Cd-doped PbS thin films and their structural and optical properties

Rajathi¹,

Kirubavathi²,

Selvaraju³

2017

Journal of Taibah University for Science

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“…As in the figure, it is clearly identified that the energy gap is low for 6% PbS:Ag, which absorbs more visible light than the other prepared films. Preetha et al have presented the similar band gap variations for aluminum (Al)‐doped PbS films using chemical bath deposition method.…”

Section: Resultsmentioning

confidence: 99%

Ag‐doped PbS thin films by nebulizer spray pyrolysis for solar cells

Rosario¹,

Kulandaisamy²,

Kumar

et al. 2020

Int J Energy Res

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Summary Silver (Ag)‐doped PbS (PbS:Ag) thin films of 616 to 745 nm in thickness were prepared on glass substrates via cost‐effective nebulizer spray method by adding different Ag levels from 2% to 8% at 200°C. For solar cell applications, the effect of Ag doping concentration on structural, morphological, optical, photoluminescence, and electrical chattels of PbS thin film has been studied. X‐ray diffraction pattern confirmed the polycrystalline behavior of the prepared PbS:Ag films with cubic crystalline nature. The crystalline size and texture coefficient were increased by increasing Ag doping concentration. From the morphological studies by scanning electron microscope (SEM) and atomic force microscope (AFM), the grain size of the films and surface roughness values were increased for the increase in Ag doping concentration. EDS spectra confirmed the existence of Ag, Pb, and S elements in the select 6% Ag‐doped PbS film. Peaks related to silver oxide started to emerge at 6% of Ag doping level. The optical direct band gap value was reduced from 1.51 to 1.17 eV for Ag doping from 2% to 6% and thereby slightly increased as 1.79 eV for 8% Ag doping level. For all PbS:Ag films, the photoluminescence spectrum emitted a strong near band edge (NBE) emission at approximately 580 nm, meaning better optical quality. Hall effect measurements evidenced that Ag doping provides enhancement on the characteristics of mobility, carrier concentration, and resistivity with p‐type conducting nature. The observed high carrier concentration and low resistivity values were 4.32 × 1014 cm−3 and 80 Ωcm, for 6% Ag‐doped PbS film. The FTO/CdS/PbS:Ag heterostructure solar cell was formed from 6% Ag‐doped film.

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“…This indicates that the films are under strain. It was previously reported that lowering of grain boundary and crystal defects in as prepared thin films are the results of enhanced nanocrystallite size (Preetha and Remadevi, 2012). The value of crystalline size, average internal strain calculated for all the films has been shown in Table 1.…”

Section: Average Crystallite Size and Internal Strainmentioning

confidence: 87%

Structural and Optical Properties of ZnS and Cr-ZnS Thin Films Prepared by Chemical Bath Deposition Method

Sarma¹

2015

AJMST

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Thin films of ZnS and Cr doped ZnS have been deposited on glass substrates by chemical bath deposition (CBD) method taking ammonia as complexing agent. The pH of the solution was maintained at 8−9 at a temperature of 70 o C. Characterization of the ZnS and Cr-doped ZnS films were carried out using X-ray diffraction (XRD), X-ray Fluorescence Spectrograph (XRFS) and Atomic force microscopy (AFM). Structural properties and optical absorption has been observed for both doped and undoped films. Parameters like crystallite size, lattice constant, microstrain, dislocation density; and optical constants such as extinction coefficient, absorption coefficient for both types of films were measured from XRD and absorbance spectra respectively. Studies show that there is an increase of crystallite size and good optical properties in visible region from 420 nm in Cr-doped ZnS thin film.

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Effect of Al incorporation on the structural, morphological, optoelectronic and transport properties of PbS thin films

Cited by 44 publications

References 18 publications

Preparation of nanocrystalline Cd-doped PbS thin films and their structural and optical properties

Preparation of nanocrystalline Cd-doped PbS thin films and their structural and optical properties

Ag‐doped PbS thin films by nebulizer spray pyrolysis for solar cells

Structural and Optical Properties of ZnS and Cr-ZnS Thin Films Prepared by Chemical Bath Deposition Method

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