Effect of substrate temperature on ZnS films prepared by thermal evaporation technique

Vishwakarma, Rahul

doi:10.1007/s40094-015-0177-5

Cited by 46 publications

(17 citation statements)

References 21 publications

(18 reference statements)

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“…Our results showed that increased crystallite size led to reduction in dislocation density and subsequent reduction in grain boundary. Similar findings were reported by Vishwakarma [40] and Nwofe et al [41]. The good crystallinity and large crystallite size obtained in ZnS(C) is a reflection of the strong and sharp intensity peak [42] which is due to the low temperature condition during synthesis.…”

Section: X-ray Diffraction Analysis Of Zns Samplessupporting

confidence: 87%

Tuning the Properties of ZnxS1-x Nanoparticles by Controlling Reaction Conditions

Olumurewa

2022

Preprint

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In this work, a modified synthesis method was deployed to obtain nanocrystalline zinc sulfide from zinc acetate. By utilizing the hydrothermal and sol gel method, the influence of: reaction time, solvent and temperature control were used to tune the properties of zinc sulfide. Our results showed that ZnS(B) (which was obtained by sol gel in water + hydrothermal) typified formation of increased sulfur vacancies while an increase in reaction time resulted in decreased sulfur vacancies. The introduction of chemical defects in ZnS(A) (which was obtained by sol gel in methanol + KOH) resulted in lower crystallite size. We observed that crystallinity improved with increased reaction time and utilization of water as solvent improved the crystallinity of the material as confirmed in ZnS(C) and ZnS(B). Furthermore, our result showed that reaction time influenced dislocation density of the material to a greater extent than type of solvent used. The crystallite size estimated by Scherer formula was in the range 1.35 nm – 18.64 nm while the band gap energy of the ZnS samples were calculated in the range 3.8 eV- 4.6 eV. Utilizing these novel syntheses methods can stimulate new directions in synthesizing ZnS crystals with options of choosing appropriate method for specific applications depending on properties to be traded off.

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Section: X-ray Diffraction Analysis Of Zns Samplessupporting

confidence: 87%

Tuning the Properties of ZnxS1-x Nanoparticles by Controlling Reaction Conditions

Olumurewa

2022

Preprint

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“…The activation energy, electrical resistivity and conductivity of all ZnS thin films were determined using the twopoint probe method. The relation for resistivity with temperature is denoted by [30]: where ρ is resistivity (in Ω•cm), E a is activation energy (in eV), k B is Boltzmann constant (in eV/K), T is the temperature (in Kelvin) and log C is constant. The Hall coefficient, carrier concentration and mobility of thin films were figured out using the relation given below [31]:…”

Section: Electrical Measurementsmentioning

confidence: 99%

Investigation of the effect of zinc precursors onto structural, optical and electrical properties of CBD deposited ZnS thin films

Rajeshkumar¹,

Patel²

2021

Nanosystems: Phys. Chem. Math.

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Zinc sulfide (ZnS) thin films were deposited onto microscopic silica slides through the cost-effective chemical bath deposition (CBD) method. The optimized bath parameters were: 25 ml of 0.1 M zinc precursors (ZnCl 2 , Zn(CH 3 COO) 2 , ZnSO 4 ), 25 ml of 1 M thiourea and 3 ml of 3.75 M triethanolamine (TEA). The effects of different zinc precursors (ZnCl 2 , Zn(CH 3 COO) 2 , ZnSO 4 ) on the growth mechanism of ZnS thin film were investigated using thermal, structural, morphological, optical and electrical studies. The XRD pattern has shown Miller indexing peaks corresponding to the hexagonal phase of as-grown ZnS thin film with the estimated grain size of 22 -27 nm. The change in physical properties (weight loss) of ZnS powder as a function of temperature was recorded using thermogravimetry (TGA/DTA). Scanning electron microscopy (SEM) revealed the effect of ZnCl 2 , Zn(CH 3 COO) 2 and ZnSO 4 precursors on growth mechanism. UV/visible optical transmission/absorption spectra displayed the transmittance between 10 to 29 % of as-grown ZnS thin film with a band gap in the range of 4.10 -4.25 eV. Photoluminescence (PL) analyses demonstrated broad blue emission around ∼ 459 nm was attributed to recombination of electron-hole pair from donor-acceptor trap levels to valance band. Raman spectra of ZnS powder prepared using different zinc precursors were also reported. The values of electrical parameters (resistivity, conductivity, activation energy, Hall coefficient, carrier concentration, mobility) were investigated using the two-point probe method and Hall-effect apparatus.

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“…There are various means suggested by researchers for substrate cleaning and documented in literature [33][34][35][36][37]. The most common includes glass substrate boiled in chromic acid for ~2 hr and kept in it for 12 hr.…”

Section: Substrate Cleaningmentioning

confidence: 99%

A Comprehensive Review on Chemical Bath Deposited ZnS Thin Film

Khatri¹

2018

IJRASET

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Chemical methods for synthesizing metal chalcogenides are currently receiving wide attention because of their simplicity, cost effectiveness and suitability for large scale deposition. Thin films can be deposited on variety of substrate such as insulators, semiconductor or metal because of lower temperature associated with these methods reduces chances of oxidation and corrosion of substrate. Slow release of anions in these processes facilitates better crystallinity with improved grain structure. Depending upon bath parameter, film deposition can take place by ion-ion mechanism of materials on the substrate or adsorption of hydroxide intermediate on substrate. Using these methods, thin films of group II-VI, III-VI, V-VI etc. have been deposited. Photo-sensor, photocells, detectors, photoluminescence, photovoltaic materials, thermo-electric materials, pigments, anti-reflective coating, optical memories, crude petroleum processing etc. are some of the application of metal chalcogenide films. In the present review article, we have described brief theoretical background necessary for chemical deposition. We discussed CBD method in details to obtain well-adherent and uniform thin film of ZnS. Their bath parameter, structural, morphological, optical, electrical properties etc. are also described.

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Effect of substrate temperature on ZnS films prepared by thermal evaporation technique

Cited by 46 publications

References 21 publications

Tuning the Properties of ZnxS1-x Nanoparticles by Controlling Reaction Conditions

Tuning the Properties of ZnxS1-x Nanoparticles by Controlling Reaction Conditions

Investigation of the effect of zinc precursors onto structural, optical and electrical properties of CBD deposited ZnS thin films

A Comprehensive Review on Chemical Bath Deposited ZnS Thin Film

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