Optical and structural study of electrodeposited zinc selenide thin films

Gromboni, Murilo F.; Mascaro, Lúcia H.

doi:10.1016/j.jelechem.2016.04.037

Cited by 18 publications

(4 citation statements)

References 38 publications

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“…Owing to these properties, different methods have been adopted to prepare the ZnSe crystals as well as thin films. These methods include; chemical bath deposition [5][6][7][8][9], chemical vapor deposition [10][11], thermal evaporation [12][13], electrodeposition [14][15][16][17] and pulsed laser deposition [18][19]. Cobalt is a potential dopant material in the ZnSe system due to its relative ionic radii (Zn 2+ → 0.74 Å and Co 2+ → 0.75 Å).…”

Section: Introductionmentioning

confidence: 99%

Properties of Electrosynthesized Cobalt Doped Zinc Selenide Thin Films Deposited at Varying Time

Ezenwaka

Okoli²,

Okereke

et al. 2021

Nanoarchitectonics

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Time optimized cobalt-doped zinc selenide thin films have been successfully electrodeposited on fluorine-doped tin oxide substrates. The films were deposited at the varying time of 1 min, 3 mins, and 5 mins respectively. Film thickness, optical, structural, electrical, and morphological properties of the deposited thin films were evaluated. Film thickness estimated using the gravimetric method increased from 294.35 nm to 399.62 nm as deposition time increased. Optical properties showed that the absorbance of the films ranged from 13.58% to 83.15% and was found to increase as deposition time increased. Transmittance ranged from 24.40% to 73.15% and was found to decrease as deposition time increased. The reflectance of the films was found to be low while the energy band gap ranged between 2.10 eV and 2.85 eV. Structural properties confirmed the deposition of ZnSe thin film with crystallite size values that fall between 14.68 nm and 18.60 nm. Dislocation density is ranged from 4.66 × 1015 lines/m2 to 2.97 × 1015 lines/m2 while microstrain ranged between 8.53 × 10-3 and 5.83 × 10-3. Crystallite sizes of the films were found to increase as deposition time increased while dislocation density and microstrain were found to decrease as deposition time increased. Electrical properties showed that the deposited films are semiconducting films with electrical resistivity values of 1.54 × 105 Ω cm-1.83 × 104 Ω cm and electrical conductivity values of 6.30 × 10-6 S/cm-5.47 × 10-5 S/cm. The micrograph of the films showed that the films were made up of nanoparticles and nanofibres of different dimensions. Energy-Dispersive X-Ray Spectroscopy (EDS) spectra of the films confirmed the presence of cobalt, zinc, and selenium.

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Section: Introductionmentioning

confidence: 99%

Properties of Electrosynthesized Cobalt Doped Zinc Selenide Thin Films Deposited at Varying Time

Ezenwaka

Okoli²,

Okereke

et al. 2021

Nanoarchitectonics

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“…In addition, unlike ZnO, ZnSe is also reported as a p- and n-type semiconductor, although it is still more difficult to realize an effective p-type than n-type ZnSe semiconductor . Till date, various ZnSe nanostructures have been investigated, − and many different methods have also been reported to prepare ZnSe films, such as chemical bath deposition, magnetron sputtering, coprecipitation method, molecular beam epitaxy, thermal evaporation, electrodeposition, pulsed laser deposition technique, and electron-beam evaporation . Among these preparation methods, electron-beam evaporation has the advantages of economy of materials, convenient operation, and environmental friendliness.…”

Section: Introductionmentioning

confidence: 99%

Cadmium-Free Nanostructured Multilayer Thin Films with Bright Blue Photoluminescence and Excellent Stability

Luo

Wang

et al. 2021

ACS Omega

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Cadmium-based quantum dots (Cd-QDs) show decent performance for lighting applications due to good color saturation, an excellent high quantum yield, and a narrow full-width at half-maximum. However, the intrinsic toxicity of Cd is a major hindrance to related applications, especially in the biological field. ZnSe, with a band gap of 2.7 eV and lower toxicity than CdSe or CdS, is promising as a blue luminescent material. Herein, we mainly reported the preparation and luminescence properties of nanostructured ZnSe/ZnS multilayer thin films with bright blue photoluminescence. The photoluminescence spectrum contained two emission peaks, located at about 442 nm (near band-edge emission) and 550 nm (defect-related emission), respectively. More importantly, the photoluminescence performance and decay were explored in detail through low-temperature photoluminescence spectra. In addition, the nanostructured ZnSe/ZnS multilayer thin films showed favorable photostability.

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“…Methods that use thermal energy, such as thermal spraying 11 and melting metal in a vacuum or inert atmosphere 12 , are utilized to get these materials, but both methods are costly and expend a great deal of energy 13 . A reasonable option is electroplating because it is a generally simple technique, inexpensive and broadly utilized in the production of composites, metallic coatings, alloys and semiconductors on different substrates 14,15 .…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition study of the Cu-Zn-Mo system in citrate/sulfate medium

et al. 2019

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Alloys and composites that contain molybdenum have been studied due to their excellent properties, such as corrosion resistance and catalytic activity. In this work, the parameters for Cu-Zn-Mo system electrodeposition were studied, such as deposition potentials and concentration of electroactive species. The deposition potentials were examined using cyclic voltammetry and anodic linear stripping voltammetry (ALSV), the deposit morphology was evaluated using scanning electron microscopy (SEM) and crystallographic characterization was carried out for X-ray diffraction (XRD). The voltammetry studies indicated co-deposition of the metals in potentials more negative than -1.2 V, and a potential deposition at -1.5 V was chosen. The coatings presented morphology compact with small agglomerated particles with cauliflower structures, and the content of molybdenum, copper, and zinc ranged from 5 to 8%, 30 to 40% and 20 to 28%, respectively.

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Optical and structural study of electrodeposited zinc selenide thin films

Cited by 18 publications

References 38 publications

Properties of Electrosynthesized Cobalt Doped Zinc Selenide Thin Films Deposited at Varying Time

Properties of Electrosynthesized Cobalt Doped Zinc Selenide Thin Films Deposited at Varying Time

Cadmium-Free Nanostructured Multilayer Thin Films with Bright Blue Photoluminescence and Excellent Stability

Electrodeposition study of the Cu-Zn-Mo system in citrate/sulfate medium

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