Effect of Annealing Temperature on the Structural and Optical Properties of CdS/PVA Nanostructure Thin Films Using Dip Coating Method

Dhatchinamurthy, L.; Thirumoorthy, P.; Arunraja, L.; Subramanian, R.

doi:10.1007/s10876-019-01544-5

Cited by 8 publications

(1 citation statement)

References 22 publications

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“…The band noticed at 1713 cm −1 is due to out of phase C=O stretching of vinyl acetate group of polymer matrix which shifts to 1718 cm −1 when PVA is encapsulated with CdS NPs, further as concentration of filler increases this band moves to 1732 cm −1 and 1735 cm −1 and this indicate that some acetyl groups are still present in PVA. 38 In addition to this in PVA/CdS nanocomposite a band appears at 1644 cm −1 which agree with bending vibration of water molecules for CdS NPs. The bands at 1430, 1373, 1255 and 1088 cm −1 are assigned to CH 2 bending vibrations, in phase C=O stretching, C-H wagging and C-O stretching vibrations of acetyl groups existing in polymer matrix and a reduction in intensity of these band are observed due to CdS NPs.…”

Section: Resultssupporting

confidence: 55%

Synergic Effect of CdS Nano Additives and UV Exposure on Properties of PVA/CdS Nanocomposite

Nain

Chahal

Dahiya

et al. 2023

ECS J. Solid State Sci. Technol.

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PVA/CdS nanocomposites with varying amounts of CdS NPs in PVA were synthesized and subjected to UV irradiation. An absorption peak around 450 nm indicates the presence of CdS NPs in PVA. UV irradiation causes red shift in wavelength in absorption spectra, suggesting an increase in particle size after UV exposure. A decrease in transmittance of PVA after embedding NPs and further with UV exposure suggests that these can be used for UV-blocking devices. The band gap of PVA decreased with an increase in NPs and UV exposure time. An increase in the refractive index of PVA after embedding CdS NPs was observed, further increasing with increasing concentration of NPs and with increase of UV exposure. Structural induced changes in PVA after embedding NPs and with UV exposure were analyzed by Fourier transform infra-red spectroscopy. Field-emission scanning electron microscopy and energy-dispersive spectroscopy analysis confirmed the presence and distribution of NPs. Photoluminescence spectrum exhibits quantum confinement effect of CdS NPs embedded in polymer matrix. The thermal nature of nanocomposite films was investigated by DSC and TG. Dependence of electrical parameters on concentration of NPs and UV exposure time were studied and explained on the basis of formation charge-transfer complexes inside matrix.

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Section: Resultssupporting

confidence: 55%