Optical and Dispersion Parameters of ZnS Thin Films Prepared by Flash Evaporation Method

Bakr, Nabeel A.; Jandow, N. N.; Habubi, Nadir F.

doi:10.18052/www.scipress.com/ilcpa.39.52

Cited by 10 publications

(3 citation statements)

References 22 publications

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“…The obtained values of the optical moments

and

are given in Table 1 [ 71 , 72 ]. The values of optical moments increase as MO NPs are introduced into PMMA matrix indicating that the ZnO, CuO, TiO 2 and SiO 2 NPs nanocomposites incorporated with PMMA thin films are highly polarized and serve as scattering centers [ 42 , 43 , 73 ].…”

Section: Uv-vis Spectroscopymentioning

confidence: 99%

Optical characterizations of PMMA/metal oxide nanoparticles thin films: bandgap engineering using a novel derived model

Al‐Bataineh

Ahmad

Alsaad

et al. 2021

Heliyon

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“…The obtained values of the optical moments

and

Section: Uv-vis Spectroscopymentioning

confidence: 99%

Optical characterizations of PMMA/metal oxide nanoparticles thin films: bandgap engineering using a novel derived model

Al‐Bataineh

Ahmad

Alsaad

et al. 2021

Heliyon

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“…The obtained values of f are displayed in Table 1 . Moreover, the effective single oscillator moments

and

can be correlated with dispersion parameters [ 59 , 60 , 61 ].

…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Optical, Chemical and Thermal Characterizations of PMMA-PS/CeO2 Nanoparticles Thin Film

et al. 2021

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We report the synthesis of hybrid thin films based on polymethyl methacrylate) (PMMA) and polystyrene (PS) doped with 1%, 3%, 5%, and 7% of cerium dioxide nanoparticles (CeO2 NPs). The As-prepared thin films of (PMMA-PS) incorporated with CeO2 NPs are deposited on a glass substrate. The transmittance T% (λ) and reflectance R% (λ) of PMMA-PS/CeO2 NPs thin films are measured at room temperature in the spectral range (250–700) nm. High transmittance of 87% is observed in the low-energy regions. However, transmittance decreases sharply to a vanishing value in the high-energy region. In addition, as the CeO2 NPs concentration is increased, a red shift of the absorption edge is clearly observed suggesting a considerable decrease in the band gap energy of PMMA-PS/CeO2 NPs thin film. The optical constants (n and k) and related key optical and optoelectronic parameters of PMMA-PS/Ce NPs thin films are reported and interpreted. Furthermore, Tauc and Urbach models are employed to elucidate optical behavior and calculate the band gaps of the as-synthesized nanocomposite thin films. The optical band gap energy of PMMA-PS thin film is found to be 4.03 eV. Optical band gap engineering is found to be possible upon introducing CeO2 NPs into PMMA-PS polymeric thin films as demonstrated clearly by the continuous decrease of optical band gap upon increasing CeO2 content. Fourier-transform infrared spectroscopy (FTIR) analysis is conducted to identify the major vibrational modes of the nanocomposite. The peak at 541.42 cm−1 is assigned to Ce–O and indicates the incorporation of CeO2 NPs into the copolymers matrices. There were drastic changes to the width and intensity of the vibrational bands of PMMA-PS upon addition of CeO2 NPs. To examine the chemical and thermal stability, thermogravimetric (TGA) thermograms are measured. We found that (PMMA-PVA)/CeO2 NPs nanocomposite thin films are thermally stable below 110 °C. Therefore, they could be key candidate materials for a wide range of scaled multifunctional smart optical and optoelectronic devices.

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“…where r r ¼ xe 0 e i and r i ¼ xe 0 e r We note that the optical conductivity decreases with the increase of wavelength which may be attributed to the decrease of the extinction coefficient as well as the density of localized states in the band gap [40].…”

Section: Refractive Index Dispersion Analysismentioning

confidence: 90%

Effect of copper concentration on the physical properties of ZnS:Cu alloys prepared by chemical bath deposition

Jrad

Naffouti

Nefzi

et al. 2016

J Mater Sci: Mater Electron

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ZnS:Cu thin films were deposited on glass substrates by chemical bath deposition technique. The structural, morphological, optical and electrical properties of the grown films were characterized by X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectrometry, scanning electron microscopy, spectrophotometry, spectrofluorimetry and Hall effect measurements. Both XRD and Raman analysis indicated the coexistence of both sphalerite ZnS and covellite CuS with cubic and hexagonal structures, respectively. The optical band gap of the films increased from 3.70 to 3.75 eV with Cu concentration increment. Photoluminescence studies revealed that the incorporation of Cu 2? ions in ZnS matrix blue shifted and quenched the emission bands. Electric resistivity, volume carrier concentration, surface carrier concentration and Hall mobility were determined from Hall effect measurements. Indeed, for pure sample, the obtained values were about 7.586 9 10 4 X cm, 1.472 9 10 11 cm -3 , 2.944 9 10 6 cm -2 and 5.590 9 10 2 cm 2 V -1 s -1 , respectively. However, after Cu incorporation, these values varied in the range of (2.273 9 10 4 -13.80 9 10 4 ) X cm, (2.334 9 10 11 -9.094 9 10 13 ) cm -3 , (4.668 9 10 6 -1.819 9 10 9 ) cm -2 and (3.092 9 10 -1 -1.937 9 10 2 ) cm 2 V -1 s -1 , respectively.

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Optical and Dispersion Parameters of ZnS Thin Films Prepared by Flash Evaporation Method

Cited by 10 publications

References 22 publications

Optical characterizations of PMMA/metal oxide nanoparticles thin films: bandgap engineering using a novel derived model

Optical characterizations of PMMA/metal oxide nanoparticles thin films: bandgap engineering using a novel derived model

Synthesis, Optical, Chemical and Thermal Characterizations of PMMA-PS/CeO2 Nanoparticles Thin Film

Effect of copper concentration on the physical properties of ZnS:Cu alloys prepared by chemical bath deposition

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