Optical and structural proper tees of ZnS and ZnS:Mn films prepared by CVD method

Bessergenev, V G; Иванова, Е. В.; Kovalevskaya, Yu. A.; Gromilov, S. A.; Kirichenko, V. N.; Zemskova, S. M.; Vasilieva, I. G.; Ayupov, B. M.; Shwarz, N.L.

doi:10.1016/0025-5408(95)00150-6

Cited by 37 publications

(12 citation statements)

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“…The formation of these impurities adds a level of complexity to the decomposition mechanism of 2 within the reaction chamber to account for the presence of such an impurity, given that the xanthate‐bearing precursors' decomposition by TGA only produces gaseous by‐products. Such complications in the decomposition of metal xanthates have previously been observed in the synthesis of zinc sulfide films . Understanding the process of the decomposition of such SSPs is still an avenue of research to explore.…”

Section: Resultsmentioning

confidence: 95%

AACVD of Molybdenum Sulfide and Oxide Thin Films From Molybdenum(V)‐based Single‐source Precursors^**

Savjani

Brent

O’Brien

2015

Chemical Vapor Deposition

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(S 2 COEt) 4 (2) single-source precursors (SSPs) via aerosol-assisted (AA À ) CVD onto glass substrates is reported. The films grown from 2 are achieved at a lower temperature than 1 (300 and 425°C, respectively), potentially attributable to the Chugaev elimination mechanism. Raman spectroscopy (RS) and scanning electron microscopy (SEM) show the composition of the films to be variable; films that are grown from the AACVD reaction of 1 are found to be of pure MoS 2 nanoplates, whereas those grown from 2 consist of MoO 3 microparticles and MoO 2 noncrystalline films, together with various nanostructures of MoS 2 , depending on deposition temperature. The decomposition processes of the SSPs are assessed to determine why these variations in thin films are seen.

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Section: Resultsmentioning

confidence: 95%

AACVD of Molybdenum Sulfide and Oxide Thin Films From Molybdenum(V)‐based Single‐source Precursors^**

Savjani

Brent

O’Brien

2015

Chemical Vapor Deposition

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“…Nanostructure ZnS exhibits distinct properties that are different from its bulk counterpart due to large surface to volume ratio. The production of ZnS nanoparticles has been described using variety of methods such as microwave irradiation [2], reverse micelles [3], chemical vapour deposition [4], hydrothermal method [5], and solid-liquid chemical reaction [6]. However, these routes are based on the use of toxic chemicals or evolve toxic materials.…”

Section: Introductionmentioning

confidence: 99%

Structural, spectral and electrical properties of green synthesized ZnS nanoparticles using Elaeocarpus floribundus leaf extract

Senapati¹,

Sarkar

2015

J Mater Sci: Mater Electron

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The present study reports an environment friendly method for the synthesis of zinc sulphide (ZnS) nanoparticles using an aqueous extract of Elaeocarpus floribundus (Indian olive) leaf that acts as a capping as well as a stabilizing agent. X-ray diffraction and selected area electron diffraction studies confirm cubic structure of the nanoparticles. Transmission electron microscopy shows spherical in shape of the particles with diameter ranging from 8 to 3 nm. Static and high frequency optical dielectric constants are determined for all the samples. The optical band gap calculated from Tauc's plot is found to increase from 3.8 to 4.1 eV. The refractive index of the samples is calculated using Moss and Herve-Vandamme models. The room temperature photoluminescence spectra of the samples show a broad peak centred at 440 nm. The biomolecules involve in the formation of ZnS nanoparticles are studied by Fourier transform infrared spectroscopy analysis. The possible growth mechanism of the synthesized ZnS nanoparticles is also discussed. Current-voltage characteristics under illumination exhibit anomalous behaviour, it shows peak through sudden rise and fall of current with increase of voltage.

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“…A variety of methods have been reported for the preparation of nano-ZnS. These methods include soft solution synthesis, sol-gel synthesis, chemical vapor deposition, hydrothermal conditions, microwave irradiation, and so forth [17][18][19][20][21][22][23][24][25][26][27]. These novel routes for synthesis of optoelectronic materials are an integral aspect of material chemistry and physics.…”

Section: Introductionmentioning

confidence: 99%

Luminescence and Morphological Kinetics of Functionalized ZnS Colloidal Nanocrystals

2012

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This paper reports functionalized zinc sulphide (ZnS) semiconductor nanocrystals (quantum dots, approx., 2.5 nm) which are an important building block in self-assembled nanostructures. ZnS is functionalized by organic stabilizer Thio glycolic acid (TGA). The samples have been synthesized by colloidal technique at relatively low temperature (below 100• C) at an atmospheric pressure of 10 −3 torr. Manganese (Mn) doping ions have been incorporated (doped) in ZnS host lattice and observed its effect on growth morphology and optical properties of ZnS colloidal nanocrystals. By XRD, SEM, TEM, and PL, the obtained cubic phase nanosized TGA-capped ZnS materials were characterized. The morphology of ZnS obtained at different temperatures are analyzed by SEM. The crystallite size of the ZnS nanoparticles was estimated from the X-ray diffraction pattern by using Scherrer's formula (approximately 2.5 nm) which is confirmed by TEM. The estimated bandgap value of ZnS NC's by (αhύ) 2 versus hύ plot was 4.89 eV. Gaussian fitting curve in photoluminescence (PL) spectra indicated room temperature emission wavelength range from 300 to 500 nm in undoped and Mn-doped ZnS, with different emission peak intensities, and suggested the wide band emission colours in visible and near UV region which has wider applications in optical devices.

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Optical and structural proper tees of ZnS and ZnS:Mn films prepared by CVD method

Cited by 37 publications

References 4 publications

AACVD of Molybdenum Sulfide and Oxide Thin Films From Molybdenum(V)‐based Single‐source Precursors^**

AACVD of Molybdenum Sulfide and Oxide Thin Films From Molybdenum(V)‐based Single‐source Precursors^**

Structural, spectral and electrical properties of green synthesized ZnS nanoparticles using Elaeocarpus floribundus leaf extract

Luminescence and Morphological Kinetics of Functionalized ZnS Colloidal Nanocrystals

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Optical and structural proper tees of ZnS and ZnS:Mn films prepared by CVD method

Cited by 37 publications

References 4 publications

AACVD of Molybdenum Sulfide and Oxide Thin Films From Molybdenum(V)‐based Single‐source Precursors**

AACVD of Molybdenum Sulfide and Oxide Thin Films From Molybdenum(V)‐based Single‐source Precursors**

Structural, spectral and electrical properties of green synthesized ZnS nanoparticles using Elaeocarpus floribundus leaf extract

Luminescence and Morphological Kinetics of Functionalized ZnS Colloidal Nanocrystals

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Product

Resources

About

AACVD of Molybdenum Sulfide and Oxide Thin Films From Molybdenum(V)‐based Single‐source Precursors^**

AACVD of Molybdenum Sulfide and Oxide Thin Films From Molybdenum(V)‐based Single‐source Precursors^**