Characterization of chemically deposited Pb1?x Cd x S films by scanning electron microscopy

Nayak, B.B.; Acharya, H. N.

doi:10.1007/bf00720058

Cited by 18 publications

(6 citation statements)

References 6 publications

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“…The CdS molecules with a smaller atomic radius, formed during the reaction, may serve as ªtailor-madeº crystal growth inhibitors to form a mixed solid solution with PbS. [18,34,35] Consequently, the smaller NPs are richer in cadmium, and thus richer in defect sites. Charge carriers are presumably trapped at these sites, and thus prolong the emission lifetime of the NPs, as demonstrated by the photoluminescence experiments.…”

Section: Discussionmentioning

confidence: 99%

(Pb1xCdx)S Nanoparticles Embedded in a Conjugated Organic Matrix, as Studied by Photoluminescence and Light-Induced X-ray Photoelectron Spectroscopy

Buller

Cohen²,

Minkin

et al. 2002

Adv. Funct. Mater.

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Elliptically shaped (Pb1–xCdx)S nanoparticles (NPs) of average size 2.3 × 2.9 nm (minor axis × major axis) have been prepared via reaction of a solid [oligo(p‐phenylene‐ethynylene) dicarboxylate]Pb0.9Cd0.1 salt matrix, with gaseous H2S. A significantly long emission lifetime, with multi‐exponential behavior, is detected in time‐resolved photoluminescence measurements, substantially different from the decay patterns of pure PbS and CdS NPs within the same organic matrix. Evidence for the co‐existence of Cd and Pb within the same particle is provided by light‐induced X‐ray photoelectron spectroscopy.

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Section: Discussionmentioning

confidence: 99%

(Pb1xCdx)S Nanoparticles Embedded in a Conjugated Organic Matrix, as Studied by Photoluminescence and Light-Induced X-ray Photoelectron Spectroscopy

Buller

Cohen²,

Minkin

et al. 2002

Adv. Funct. Mater.

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“…Chemical bath deposition (CBD) is the most widely explored method for the production of polycrystalline Cd x Pb 1– x S films. The most flexible ranges of alloy composition achieved are in the Pb-rich region of the composition spectrum, − although some selected compositions have been produced, which are in the center and Cd-rich alloy region. − Regarding the previous CBD work, Rabinovich et al suggested that the wide range of solubilities claimed was not always sufficiently supported by the X-ray diffraction (XRD) results . They demonstrated CBD-grown films with x up to 0.18, as determined by detailed XRD and additionally verified by atomic absorption spectroscopy to measure the Cd/Pb ratio in the film.…”

Section: Resultsmentioning

confidence: 99%

Cd_xPb_1–xS Alloy Nanowires and Heterostructures with Simultaneous Emission in Mid-Infrared and Visible Wavelengths

et al. 2015

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Alloying of CdS and PbS could potentially provide an important semiconductor with a wide range of bandgaps, with bandedge emission from mid-infrared to visible green, for various optoelectronic applications. We investigate the possibility of CdPbS alloy formation in nanowire and nanobelt forms, especially the dependence of alloy composition on two different cooling routes. Our results show that rapid cooling immediately after the growth phase can lead to a high-quality uniform alloy with Cd composition larger than possible at thermal equilibrium and by natural cooling. On the contrary, unassisted natural cooling leads to the formation of axial or core-shell heterostructures, containing segments with pure CdS and CdPbS alloys with lower Cd content than through rapid cooling. Such heterostructures with green and mid-infrared emission provide simultaneous access to two widely separated wavelengths from a single monolithic structure and can be important for many applications. Our results can help identify strategies for growing nanostructures with uniform alloy of high Cd incorporation, core-shell structures with shell serving as a passivating or protecting layer, or interesting longitudinal heterostructures. Both various heterostructures and uniform alloys of these materials could be important for high-efficiency solar cells, novel detectors, and nanolasing in wide spectral ranges.

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“…Thin films of lead sulphide and cadmium sulphide are a promising photo voltaic materials as their variable band gap could be adjusted to match the ideal band gap (∼1.5 eV) required for achieving a most efficient solar cell [21]. Extensive studies of the electrical and optical properties of PbS-CdS have been conducted by many researchers [22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Structural, optical and electrical properties of sulphide based heterojunction thin film

Obot¹,

Augustine²,

Chikwenze³

et al. 2023

JOR

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This contribution presents structural, optical and electrical properties of PbS/CdS thin films at different annealing temperatures. The XRD analysis reveal the existence of three different crystalline phases, i.e., the beta-CdS, hawleyite-CdS and greenockite-alpha-CdS phases within the CdS-shell of PbS/CdS core shell thin film. The dislocation density and microstrain decreased with annealing temperatures indicating a decrease in lattice imperfections and formation of high quality film and it can be attributed to the increase in grain size of the film with increase in annealing temperatures. Optical studies placed the band gaps at 1.25eV-1.75eV. About the same magnitude were found from electrical conductivity test. The samples exhibited high conductivity with increasing annealing temperatures which resulted to the bumping of electrons from the valence band to the conduction band. The high absorbance suggest that the film could be coated on collectors to enhance solar energy collection. The achieved band gaps placed the PbS/CdS fabricated with the presented method as a good material for solar photovoltaic applications.

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Characterization of chemically deposited Pb1?x Cd x S films by scanning electron microscopy

Cited by 18 publications

References 6 publications

(Pb1xCdx)S Nanoparticles Embedded in a Conjugated Organic Matrix, as Studied by Photoluminescence and Light-Induced X-ray Photoelectron Spectroscopy

(Pb1xCdx)S Nanoparticles Embedded in a Conjugated Organic Matrix, as Studied by Photoluminescence and Light-Induced X-ray Photoelectron Spectroscopy

Cd_xPb_1–xS Alloy Nanowires and Heterostructures with Simultaneous Emission in Mid-Infrared and Visible Wavelengths

Structural, optical and electrical properties of sulphide based heterojunction thin film

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Characterization of chemically deposited Pb1?x Cd x S films by scanning electron microscopy

Cited by 18 publications

References 6 publications

(Pb1xCdx)S Nanoparticles Embedded in a Conjugated Organic Matrix, as Studied by Photoluminescence and Light-Induced X-ray Photoelectron Spectroscopy

(Pb1xCdx)S Nanoparticles Embedded in a Conjugated Organic Matrix, as Studied by Photoluminescence and Light-Induced X-ray Photoelectron Spectroscopy

CdxPb1–xS Alloy Nanowires and Heterostructures with Simultaneous Emission in Mid-Infrared and Visible Wavelengths

Structural, optical and electrical properties of sulphide based heterojunction thin film

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Cd_xPb_1–xS Alloy Nanowires and Heterostructures with Simultaneous Emission in Mid-Infrared and Visible Wavelengths