Structure, morphology, and photoresponse characteristics dependence on substrate nature of grown π-SnS films using chemical bath deposition

Mahdi, Mohamed S.; Al-Arab, Husam S.; Hmood, A.; Bououdina, M.

doi:10.1016/j.optmat.2021.111910

Cited by 13 publications

(4 citation statements)

References 68 publications

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“…Figures 2(b)-(d) exhibit noticeable morphological variations correlating with increasing Cu contents. In figure 2(b), the FESEM image reveals the evolution of new morphology like randomly oriented nanoplates with the incorporation of Cu [38]. The diameter of these nanoplates lies in the range of 300-450 nm with an average diameter of 50 nm.…”

Section: Morphological Analysismentioning

confidence: 98%

Investigation of structural, morphological, optical and electronic properties of Cu-doped PbS thin films: a comparative experimental and theoretical study

Ramay,

Aldosary

2024

Phys. Scr.

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Thin film technology has emerged as a cornerstone in optoelectronics, enabling the fabrication of compact, lightweight devices with enhanced performance and efficiency through precise control of the nanoscale thicknesses of functional materials. The current study explores the impact of copper (Cu) doping (3.125%, 6.25%, and 12.5%) on lead (Pb) sites in PbS to examine the structural, morphological, electronic, optical, and thermoelectric characteristics, employing both experimental and theoretical approaches. Polycrystalline thin films of PbS are deposited by spin coating technique on glass substrates. The XRD study discloses the cubic crystal structure of pristine and Cu-doped PbS with nominal variation in d-spacing. Surface morphological investigations reveal that Cu-doping transforms the coffee beans like grains to nanoplates that significantly affect the surface homogeneity and porosity. The tuning of band structure in the visible range, 1.64-2.21 eV is witnessed in the band structure analysis. Moreover, the experimental results are complemented by a theoretical study using WIEN2k software. Theoretical study exhibits the direct bandgap nature and with the incorporation of Cu, it increases from 0.89 to 2.11 eV. The density of states spectra for Cu-doped PbS exhibits strong hybridization between p-states of Pb and S, and d-states of Cu. Optical findings demonstrate significant variations in the absorption spectrum, which result in modifications in the optical energy band gap and peculiar optical parameters of doped samples. At room temperature, the increase in electrical conductivity from 0.2x1020 (Ω.m.s)-1 for PbS to 0.3x1020, 3.1x1020 and 7.8 x1020 (Ω.m.s)-1¬¬, thermal conductivity from 0.25x1014 W/m.K.s to 0.30x1014, 2.4x1014 and 5.2x1014 W/m.K.s and decrease in Seebeck coefficient from 72 to 35, 13 and 8 µV/K with the inclusion of Cu up to 3.125, 6.25 and 12.5% offer the potential for advancing thermoelectric technology. This could lead to improved efficiency and practical utilization in energy harvesting and waste heat recovery.

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Section: Morphological Analysismentioning

confidence: 98%

Investigation of structural, morphological, optical and electronic properties of Cu-doped PbS thin films: a comparative experimental and theoretical study

Ramay,

Aldosary

2024

Phys. Scr.

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“…Figure 2 shows FESEM images of deposited films on various substrates. It is obvious that the grown films on polyester and glass substrates comprise many flower-like nanostructures agglomerating for SnS orthorhombic structure, as well as beneath a layer of spherical grains for cubic SnS [16,20,21]. While the grown film on the glass substrate comprised distributed and uniformly many flower-like nanostructures for orthorhombic structure SnS, as well as a beneath layer of spherical grains for cubic SnS, The presence of two morphologies that relate to orthorhombic and cubic structures agrees with the XRD analysis of Figure 1.…”

Section: Surface Morphologymentioning

confidence: 99%

The Effect of substrate Nature on the properties of Tin Sulfide Nanostructured films Prepared by chemical bath deposition

Al Hilli,

Abood,

Mehdi

2023

IHJPAS

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The substrate's nature plays an important role in the characteristics of semiconductor films because of the thermal and lattice mismatching between the film and the substrate. In this study, tin sulfide (SnS) nanostructured thin films were grown on different substrates (polyester, glass, and silicon) using a simple and low-cost chemical bath deposition technique. The structural, morphological, and optical properties of the grown thin films were investigated using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and ultraviolet-visible-near infrared (UV-Vis-NIR) spectroscopy. The XRD and FESEM results of the prepared films revealed that each film is polycrystalline and exhibits both orthorhombic and cubic structure types. In addition, the deposited films on polyester and glass showed good absorption in the UV-Vis-NIR range.

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“…The thin film with a thickness of 700 nm has reduced photocurrent, possibly because of the trapping of photo generated carriers in thicker film. In addition, the relation between the power density and the photocurrent may be fitted by a simple power-law [47,48]:…”

Section: Photodetector Characteristicsmentioning

confidence: 99%

Effect of SnS thin film thickness on visible light photo detection

Alagarasan¹,

Hegde²,

Varadharajaperumal³

et al. 2022

Phys. Scr.

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In this study, SnS thin films of various thicknesses (500 nm- 700 nm) were prepared by the thermal evaporation technique for potential photodetector application. High purity SnS prepared at 1000oC is used to deposit thin films at room temperature. The prepared SnS thin films were characterized to assess the thickness effect on the crystallite size, morphology, transmittance, band gap, and photo-sensing properties. SnS pure phase confirmed through XRD and Raman spectral analysis. Among the fabricated SnS thin films, the sample having a thickness of 650 nm showed better crystallinity with higher crystallite size and preferred orientation of crystallites. SnS grew plate-like-columnar grain morphology of different widths and thicknesses which is confirmed by FESEM results. The UV–Vis studies showed a minimum band gap value obtained for 650 nm thickness film. The 650 nm thickness SnS films have a highest photo response of 6.72 ×10-1 AW-1, external quantum efficiency (EQE) of 157%, and detectivity of 14.2 ×109 Jones. The transient photo-response analysis showed the 650 nm SnS thin film has a 5.3 s rise and 5.1 s fall duration, which is better suitable for photodetector applications compared to other samples.

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Structure, morphology, and photoresponse characteristics dependence on substrate nature of grown π-SnS films using chemical bath deposition

Cited by 13 publications

References 68 publications

Investigation of structural, morphological, optical and electronic properties of Cu-doped PbS thin films: a comparative experimental and theoretical study

Investigation of structural, morphological, optical and electronic properties of Cu-doped PbS thin films: a comparative experimental and theoretical study

The Effect of substrate Nature on the properties of Tin Sulfide Nanostructured films Prepared by chemical bath deposition

Effect of SnS thin film thickness on visible light photo detection

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