Synthesis of polymer–PbS nanocomposite by solar irradiation-induced thermolysis process and its photovoltaic applications

Saikia, Dulen; Gogoi, P. K.; Saikia, Prasanta Kumar; Sarma, Sidananda

doi:10.1080/17458080.2012.740639

Cited by 11 publications

(8 citation statements)

References 28 publications

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“…The absorption coefficient (α) of fabricated films was calculated from the absorbance (A) values after correction for reflection using the relation The shift in absorption edge toward lower energy or higher wavelength may be correlated to the effective dispersion of nanofillers in the PVA matrix. 32 A sharp increase in absorbance is observed near the fundamental absorption edge indicating good crystalline nature of the films. 33 Evaluation of Optical Band Gap (Effect of Nanofiller Content).…”

Section: ■ Results and Discussionmentioning

confidence: 95%

“…The absorption edge of undressed PVA lies around 4.8 eV (around 258 nm), while for doped ones, their positions are found to be displaced toward lower energy values, exhibiting a minimum of 4.4 eV for 4 wt % Cs 2 ZnO 2 -doped PVA film. The shift in absorption edge toward lower energy or higher wavelength may be correlated to the effective dispersion of nanofillers in the PVA matrix . A sharp increase in absorbance is observed near the fundamental absorption edge indicating good crystalline nature of the films…”

Section: Resultsmentioning

confidence: 99%

“…31 Assessment of Absorption Edge. The absorption coefficient (α) of fabricated films was calculated from the absorbance (A) values after correction for reflection using the relation 32 A sharp increase in absorbance is observed near the fundamental absorption edge indicating good crystalline nature of the films. 33 Evaluation of Optical Band Gap (Effect of Nanofiller Content).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Opto-Electrical Characteristics of Poly(vinyl alcohol)/Cesium Zincate Nanodielectrics

Subramani

Siddaramaiah

2015

J. Phys. Chem. C

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Polymer nanocomposites for electro-optics are known to offer novel material morphologies and unique device geometries, thereby enhancing the device performance. In this study, we report the successful fabrication of one such blue-green fluorescent poly(vinyl alcohol) (PVA)/cesium zincate (Cs 2 ZnO 2 ) nanocomposite by solution intercalation technique. The optoelectronic properties of prepared films were probed with the intent to establish the effect of nanointegrates on optical and electrical characteristics of particle stabilizing PVA. The optical absorbance studies revealed the UV absorbent nature of PVA/Cs 2 ZnO 2 films exhibiting a steep UV absorption coupled with high visible transmission. The optical parameters of nanocomposite films, including absorption/extinction coefficients, optical band gap, complex refractive index (RI), and dielectric functions besides optical conductivity were evaluated, which supports the dopantdependent optical properties of PVA with a scope for band gap engineering. The dispersion and functionalization of nanofillers were characterized by FESEM. The integrated fillers induced a broad blue−green luminescence (2.88−2.58 eV) in the emission spectrum of PVA. The structural aspects were probed by FTIR studies, while charge transport properties were valued by dielectric studies. The dielectric properties (dielectric storage and dielectric loss), AC conductivity, and charge dissipation were found to increase with nanofiller content and decrease with frequency. ■ INTRODUCTIONPolymer nanocomposites are of particular interest in photonics and optoelectronics, owing to their excellent ability to harness unique material properties arising from the synergistic combination of opto-electrical effectiveness of the nanoinclusions, alongside admirable processability of the polymer systems. The unearthing of compounds with interesting material properties often opens up novel research pathways, eventually leading to new technology. A proper understanding of unearthed properties and their filler-dependent tuning may lead to hybrid devices with advanced properties. This is the central theme in smart material technology, which involves efforts to tune the material properties according to specific application requirements. This involves the simultaneous and perhaps synergistic tailoring of various properties, which can be nontrivial. Polymer nanocomposite technology is one such area, which utilizes the unique material properties arising from sizedependent material properties to design/develop and fabricate materials with unique physicochemical properties for specified applications. In recent years, polymer-encapsulated transparent semiconducting inorganic nanofillers have attracted a great deal of scientific and technological interest as advanced technological materials, especially in the field of photonics and optoelectronics. 1−5 Polymer nanocomposites are also extensively employed in applications related to optical storage systems owing to their exceptionally high thermal stability and filler-depend...

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Section: ■ Results and Discussionmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Opto-Electrical Characteristics of Poly(vinyl alcohol)/Cesium Zincate Nanodielectrics

Subramani

Siddaramaiah

2015

J. Phys. Chem. C

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“…The blue shift in the absorption edges may be attributed due to the quantum confinement effect in CdSe nanoparticles [25,31]. From the spectra, it is observed that the sharp increase in absorbance near the fundamental absorption edge for the CdSe/PVA thin films (S4 and S5) is an indication of good crystalline nature of the films [32]. The red shift in the spectra (S5) indicates the formation of nanoparticles greater than the exciton Bohr radius (EBR) of CdSe [25,31].…”

Section: Resultsmentioning

confidence: 95%

Optical and Structural Investigation of CdSe Quantum Dots Dispersed in PVA Matrix and Photovoltaic Applications

Phukan¹,

Saikia²

2013

International Journal of Photoenergy

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CdSe quantum dots (QDs) dispersed in polyvinyl alcohol (PVA) matrix with their sizes within the quantum dot regime have been synthesized via a simple heat induced thermolysis technique. The effect of the concentrations of the cadmium source on the optical properties of CdSe/PVA thin films was investigated through UV-Vis absorption spectroscopy. The structural analysis and particle size determination as well as morphological studies of the CdSe/PVA nanocomposite thin films were done with the help of X-ray diffraction (XRD) and transmission electron microscopy (TEM). The XRD analysis reveals that CdSe/PVA nanocomposite thin film has a hexagonal (wurtzite) structure. A prototype thin film solar cell of CdSe/CdTe has been synthesized and its photovoltaic parameters were measured.

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“…This spectrum corresponds to the colors of light detectable by the human eye, providing information about the proportion of light within this range that can successfully traverse the material. 29,30 The optical transmittance characteristics of the developed PVA/SrThO 3 nanocomposite have been thoroughly studied and are graphically presented in Figure 6. The UVvisible transmittance spectra of the PVA nanocomposites (Figure 6) highlight the influence of SrThO 3 nanofillers on the optical clarity of PVA films.…”

Section: Exploring Uv-visible Transmittancementioning

confidence: 99%

Inorganic metal oxide‐reinforced polymer‐based flexible inorganic nanocomposite for UV shielding applications

Puttaswamy,

Kundachira Subramani,

Shivanna

et al. 2024

J of Applied Polymer Sci

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This investigation reveals the successful incorporation of strontium‐doped thorium oxide (SrThO3) NPs into polyvinyl alcohol (PVA) polymer nanocomposites. The fabrication process of these PVA nanocomposites entails utilizing varying amounts (0.5, 1.0, 2.0, and 4.0 wt%) of SrThO3 nanofillers through a straightforward solution casting technique. The microstructure and overall structure of the resulting polymer nanocomposites were analyzed using powdered x‐ray diffraction for crystalline structure and Fourier transform infrared (FTIR) spectroscopy for molecular composition. The introduced SrThO3 nanofiller demonstrates a strong affinity for the hydroxyl groups present in the PVA polymer, a phenomenon validated through FTIR spectroscopy. In order to comprehend the impact of doping, the surface morphology of the PVA polymer nanocomposites underwent examination via scanning electron microscopy. The absorption and transmission of light were quantitatively assessed using UV–visible spectroscopy. The excitation and emission behaviors of electrons in both the PVA and SrThO3‐doped PVA nanocomposites were scrutinized through photoluminescence spectroscopy. Furthermore, the extent of UV light absorption was investigated by studying the degradation of methylene blue dye, a substance known for its sensitivity to UV light. Results indicate that the intentional incorporation of SrThO3 NPs significantly enhances UV stability.

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Synthesis of polymer–PbS nanocomposite by solar irradiation-induced thermolysis process and its photovoltaic applications

Cited by 11 publications

References 28 publications

Opto-Electrical Characteristics of Poly(vinyl alcohol)/Cesium Zincate Nanodielectrics

Opto-Electrical Characteristics of Poly(vinyl alcohol)/Cesium Zincate Nanodielectrics

Optical and Structural Investigation of CdSe Quantum Dots Dispersed in PVA Matrix and Photovoltaic Applications

Inorganic metal oxide‐reinforced polymer‐based flexible inorganic nanocomposite for UV shielding applications

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