The degradation of thin poly(methyl methacrylate) films subjected to different destructive treatments

Berdie, Adela Diana; Berdie, A A; Jitian, Simion

doi:10.1007/s10965-020-02390-0

Cited by 7 publications

(3 citation statements)

References 30 publications

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“…There is no peak in the range of 1,630-1,640 cm -1 which confirms the absence of unsaturation and complete transformation of MMA monomer into PMMA [32,33]. Pure PMMA shows spectra regions at around 2950, 1723, 1142, and 750 cm -1 , which corresponded to the presence of CH3, CO stretching, COC, and CH2 twisting modes, respectively [34,35].…”

Section: Characterization Of Complex/pmma Lscsmentioning

confidence: 78%

Enhanced efficiency of silicon solar cell by new salophen complexes embedded PMMA as light concentrators

Ahmed,

Mohamed,

Reda

2024

Preprint

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The Schiff base N,N-bis(salicylidene)-o-phenylenediamine (salophen) was prepared by the condensation of salicylaldehyde with o-phenylenediamine in ethanol solution. Two new Zn(II) and Ni (II) salophen complexes, were synthesized, fully characterized by infrared (IR), 1H NMR spectroscopic measurements, UV-Vis spectra, photoluminescence (PL), and X-ray diffraction. The prepared complexes were used as phosphors to fabricate complexes/PMMA slab-based luminescent solar concentrators (LSC). The thermal stability of pure and doped PMMA polymer was examined by differential scanning calorimetry. Various parameters such as the optical energy gap, refractive index, AC and DC conductivity, dielectric constant, dielectric loss, Urbach energy, fluorescence quantum yield, and Stokes shift have been calculated and discussed. Optical absorption is carried out in wavelength region 200-900 nm at room temperature before and after the samples have been exposed to sunlight for up to 8 hrs. Photodegradation studies showed that the Zn (II) complex/PMMA LSC have the lowest rate of degradation compared with Ni (II) complex/PMMA LSC with the same concentration (0.06% weight). I–V characteristics of the photovoltaic devices with and without collectors were examined. The PV cell coupled with LSC shows an increase in maximum efficiency by about 50% compared to the normal one. This indicates that the proposed technique is very useful for improving the efficiency of solar cells.

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Section: Characterization Of Complex/pmma Lscsmentioning

confidence: 78%

Enhanced efficiency of silicon solar cell by new salophen complexes embedded PMMA as light concentrators

Ahmed,

Mohamed,

Reda

2024

Preprint

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show abstract

“…The middle part of the film was used in the tests to ensure uniform thickness. This polymer film casting was used because it allows one to obtain surface films of controlled and uniform thickness on the entire metal mirror surface [7]. The spin coating technique [30][31][32][33] or the dip coating technique [34,35] commonly used to obtain thin surface films can induce a certain orientation of the polymer chain during the casting of the polymer film.…”

Section: Methodsmentioning

confidence: 99%

“…The modeling process consists of introducing into the expression of permittivity described by the Drude-Lorentz equation the dispersion parameters ε∞, ν0, νp , γ corresponding to the independent oscillators of the different groups in the polymer structure and adjusting them until the transmittance Tmodel obtained from the modeled permittivity approximates the best Texperimental transmittance corresponding to the reflection-absorption spectrum of the polymer [4,5,7].…”

Section: Introductionmentioning

confidence: 99%

Infrared spectra of the main optical properties of poly(methyl methacrylate) thin films

Strugariu,

Șerban,

Berdie

et al. 2024

Polym. Bull.

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Infrared spectra are presented for the main optical properties of poly(methyl methacrylate) films. They are obtained from the complex permittivity using the Drude-Lorentz model for permittivity. This approach is original in obtaining the permittivity and then in obtaining the main optical properties of the polymer film. Classical dispersion analysis of the reflection-absorption spectrum of poly(methyl methacrylate) films cast on the metal mirror was used. Subsequently, the complex electric modulus, energy loss function, optical constants, absorption coefficient, penetration depth, dissipation factor, and complex optical conductivity were obtained from the complex permittivity.

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Enhanced Efficiency of Silicon Solar Cell by New Salophen Complexes Embedded PMMA as Light Concentrators

Ahmed,

Mohamed,

Reda

2024

J Inorg Organomet Polym

View full text Add to dashboard Cite

The Schiff base N,N-bis(salicylidene)-o-phenylenediamine (salophen) was prepared by the condensation of salicylaldehyde with o-phenylenediamine in ethanol solution. Two new Zn(II) and Ni(II) salophen complexes, were synthesized, fully characterized by infrared (IR), 1H NMR spectroscopic measurements, UV–Vis spectra, photoluminescence (PL), and X-ray diffraction (XRD). The prepared complexes were used as phosphors to fabricate complexes/PMMA slab-based luminescent solar concentrators (LSC). The thermal stability of pure and doped PMMA polymer was examined by differential scanning calorimetry. Various parameters such as the optical energy gap, refractive index, AC and DC conductivity, dielectric constant, dielectric loss, Urbach energy, fluorescence quantum yield, and Stokes shift have been calculated and discussed. Optical absorption is carried out in wavelength region 200–900 nm at room temperature before and after the samples have been exposed to sunlight for up to 8 h. Photodegradation studies showed that the Zn(II) complex/PMMA LSC has the lowest rate of degradation compared with Ni(II) complex/PMMA LSC with the same concentration (0.06% weight). I–V characteristics of the photovoltaic devices with and without collectors were examined. The PV cell coupled with LSC shows an increase in maximum efficiency by about 50% compared to the normal one. This indicates that the proposed technique is very useful for improving the efficiency of solar cells.

show abstract

The degradation of thin poly(methyl methacrylate) films subjected to different destructive treatments

Cited by 7 publications

References 30 publications

Enhanced efficiency of silicon solar cell by new salophen complexes embedded PMMA as light concentrators

Enhanced efficiency of silicon solar cell by new salophen complexes embedded PMMA as light concentrators

Infrared spectra of the main optical properties of poly(methyl methacrylate) thin films

Enhanced Efficiency of Silicon Solar Cell by New Salophen Complexes Embedded PMMA as Light Concentrators

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