Optical properties of quaternary a-Ge15-x Sbx Se50 Te35 thermally evaporated thin-films: refractive index dispersion and single oscillator parameters

Hassanien, Ahmed Saeed; Sharma, Ishu

doi:10.1016/j.ijleo.2019.163415

Cited by 152 publications

(56 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dispersion phenomena of n of thin films is a crucial factor for designing highly effective optical devices and to elucidate the related key optical parameters, [ 66 , 67 ]. These parameters are calculated using Wemple–DiDomenico (WDD) model [ 68 ].…”

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

View full text Add to dashboard Cite

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

View full text Add to dashboard Cite

“…As the CeO 2 NPs concentrations is increased to 3%, 5%, and 7%, n continuously increases to (1.88–2.15), (1.83–2.18) and (1.85–2.26). Consequently, (PMMA-PS)/CeO 2 nanocomposite thin films could be potential candidates as excellent reflective material [ 51 ].…”

Section: Resultsmentioning

confidence: 99%

“…Refractive index dispersion is one of the most crucial parameters. Moreover, calculating dispersion energies is essential to obtain a deeper insight into the applications of (PMMA-PS)/CeO 2 nanocomposite thin films for optical devices [ 51 ]. Therefore, refractive index and dispersion energies must be studied carefully to specify the potential application of the material [ 54 ].…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

“…The extinction coefficient is a fundamental optical parameter. Itmeasures the behavior of decrease in the emitting light due to absorption coefficient and attenuation and can be calculated using the accompanying formula [28] k = 4 (6) where α states absorption coefficient of thin film and λ provides the data incident wavelength in the thin films. The incident wavelength (λ) vs extinction coefficient (k) shows in Fig 9.…”

Section: Extinction Coefficient Analysismentioning

confidence: 99%

Structural and Optical Properties in thin-films of (GeGa2)100-x(Sb2Ga3)x (x = 15, 30, 45, 60) Alloys

Raj

Lohia

Dwivedi

2021

Preprint

View full text Add to dashboard Cite

Investigation of structural morphology and optical parameters of non-oxide (GeGa2)100−x (Sb2Ga3)x (x = 15, 30, 45, 60) glass alloys have been studied in the present paper. Thin films of prepared bulk samples by melt quenching technique were obtained using thermal evaporation method. XRD, DSC and SEM were used to investigate the structural morphology and thermal properties of materials. The linear and non-linear optical properties of prepared samples have been studied for optoelectronic applications. FTIR transmittance spectra defines the impurities present in the prepared glassy alloys. It was observed that energy bandgap (Eg) obtain by Tauc’s plot varies from 2.9 eV to 1.25 eV. The calculated value of k, Eg decreases whereas the α and Urbach energy increases with increasing doping Sb concentration. The decrease in energy bandgap is discussed on the basis of Mott and Davis model.

show abstract

Optical properties of quaternary a-Ge15-x Sbx Se50 Te35 thermally evaporated thin-films: refractive index dispersion and single oscillator parameters

Cited by 152 publications

References 60 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

Structural and Optical Properties in thin-films of (GeGa2)100-x(Sb2Ga3)x (x = 15, 30, 45, 60) Alloys

Contact Info

Product

Resources

About