Solution grown Pb1−xCoxS semiconductor nanoparticle films

Mathur, Nidhi; Joshi, Rakesh; Subbaraju, Gottumukkala V.; Sehgal, H.K.

doi:10.1016/j.physe.2003.12.129

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…The band edge of the nanocomposites was located at 790 nm (1.5 eV), had a blue shift of approximately 288 nm with respect to the band gap of 1078 nm (1.15 eV) for bulk Co 3 S 4 . The hump centered at 750 nm corresponds to the band gaps of Co 3 O 4 and Co 3 S 4 which, interestingly, are almost in the same range [17,18].…”

Section: Resultsmentioning

confidence: 89%

Single Step Solid-Solid Reaction Scheme for the Synthesis of Cobalt Sulphide-Oxide Nanoparticles in Polymer Matrix

Rumale¹,

Arbuj²,

Umarji³

et al. 2013

ANP

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At present, there is considerable interest in polymer-metal chalcogenides/oxides based nano-composites on account of their tunable optical, magnetic, electronic and catalytic properties. Here in, we report a simple single step approach for the in-situ synthesis of combined cobalt sulphide/cobalt oxide in polyphenylenesulphide (PPS) polymer matrix. We have illustrated the suitability of this methodology by reacting commonly available cobalt precursors with engineering thermoplastic, PPS. The cobalt precursor was homogeneously mixed with PPS in the molar ratios of 1:1, 1:5, 1:10, 1:15, respectively, followed by heating the mixtures obtained at the melting temperature of the polymer (285˚C) for six hours. The resultant products were characterized by X-ray Diffractometry (XRD), Field-Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscope (HRTEM), Diffuse Reflectance Spectroscopy (DRS) technique and Fourier Transformation Infra red Spectroscopy (FTIR). Formation of mixed phases viz., sulphide and oxide of cobalt within modified PPS matrix was confirmed by XRD. The resultant nanoparticles of cobalt sulphide and cobalt oxide embedded in the PPS matrix showed crooked and chunk morphology. The optical properties of the resultant nanocomposites indicate the shift in the absorption hump due to nanoscale size effect.

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Section: Resultsmentioning

confidence: 89%

Single Step Solid-Solid Reaction Scheme for the Synthesis of Cobalt Sulphide-Oxide Nanoparticles in Polymer Matrix

Rumale¹,

Arbuj²,

Umarji³

et al. 2013

ANP

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“…to meet the demands of several application fields such as thin film solar cells [2], electrochemical cells [3], gas sensor [4] and it has also been employed in high efficiency solar cells formed with Cu 2 S [5], Cu(InGa)Se 2 [6] etc. At present most of the semiconductors research is dedi cated towards the fabrication of low sized particles and these particles/semiconductor show a large opti cal band gap when the crystallite size becomes less than the Bohr exciton radius [7][8][9]. On the other hand PbS belonging to IV-VI group semiconductor with a direct narrow band gap (0.41 eV) suitable for infrared detection applications [10,11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of the as-deposited Cd1 − x Pb x S thin films prepared by spray pyrolysis technique

Kamruzzaman

Dutta²,

Podder

2012

Semiconductors

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Cd 1 -x Pb x S thin films were prepared by spray pyrolysis technique onto glass substrate at 300°C temperatures. The prepared films were characterized elemental, structural and optical properties by energy dispersive X ray, scanning electron microscopy, X ray diffraction and UV-VIS spectrophotometer. Energy dispersive X ray confirmed the presence of Cd, S and Pb in the films. SEM images show that the deposition covered the substrate well uniformly and incorporation of Pb. Crystal structure was found hexagonal and the estimated grain size was lies in between 9 to 49 nm. The optical band gap was decreased from 2.43 to 2.07 eV.

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“…Nowadays, most of the semiconductor research is dedicated towards the fabrication of small-sized particles due to development of spintronics, molecular electronics and quantum logic. These materials show a large optical band gap when the crystallite size becomes less than the Bohr exciton radius [9,10]. CoS is an intrinsic semiconductor and a suitable candidate for photovoltaic or photothermal applications, which has an optical band gap of 1.15 eV with cubic structure [11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Cd₁₋_xCo_xS thin films prepared using the spray pyrolysis technique

Kamruzzaman¹,

Luna²,

Podder³

et al. 2012

Semicond. Sci. Technol.

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The Cd 1−x Co x S (x = 0.00, 0.10, 0.20 and 0.40) thin films were deposited onto the glass substrate at a temperature of 523 K using a low cost spray pyrolysis technique. The SEM images show that the grain size and the roughness of the films were increased with increasing Co doping concentration. The as-deposited films were amorphous in nature but the annealed samples had a crystalline wurtzite hexagonal structure and the estimated average grain size lay in the range of 7 to 49 nm. The optical band gap of the films was decreased from 2.54 to 2.40 eV. The conductivity and activation energy of the films were decreased with increasing Co content but all the films showed semiconducting behaviour in the measured temperature range.

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Solution grown Pb1−xCoxS semiconductor nanoparticle films

Cited by 5 publications

References 10 publications

Single Step Solid-Solid Reaction Scheme for the Synthesis of Cobalt Sulphide-Oxide Nanoparticles in Polymer Matrix

Single Step Solid-Solid Reaction Scheme for the Synthesis of Cobalt Sulphide-Oxide Nanoparticles in Polymer Matrix

Synthesis and characterization of the as-deposited Cd1 − x Pb x S thin films prepared by spray pyrolysis technique

Synthesis and characterization of Cd₁₋_xCo_xS thin films prepared using the spray pyrolysis technique

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Solution grown Pb1−xCoxS semiconductor nanoparticle films

Cited by 5 publications

References 10 publications

Single Step Solid-Solid Reaction Scheme for the Synthesis of Cobalt Sulphide-Oxide Nanoparticles in Polymer Matrix

Single Step Solid-Solid Reaction Scheme for the Synthesis of Cobalt Sulphide-Oxide Nanoparticles in Polymer Matrix

Synthesis and characterization of the as-deposited Cd1 − x Pb x S thin films prepared by spray pyrolysis technique

Synthesis and characterization of Cd1−xCoxS thin films prepared using the spray pyrolysis technique

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Synthesis and characterization of Cd₁₋_xCo_xS thin films prepared using the spray pyrolysis technique