Alteration of structural, optical and electrical properties of CdSe incorporated polyvinyl pyrrolidone nanocomposite for memory devices

Tyagi, Chetna; Devi, Ambika

doi:10.1142/s2010135x18500200

Cited by 26 publications

(4 citation statements)

References 88 publications

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“…From this figure, it is observed that the α>10 4 cm -1 which means the indirect transition happens. The rise of α is related to a rise in light absorption [23]. The nanocomposites are said to have an indirect energy gap if the value of α is less than 10 4 cm -1 .…”

Section: Resultsmentioning

confidence: 99%

Effect of Titanium Nitrate Nanoparticles on Optical Properties of PVA/PEG Blend for Optoelectronics Detectors

Mohammed¹,

Abdullah²,

Hassan³

et al. 2022

RCME

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In this work, casting method was used to fabricate the polyvinyl alcohol (PVA)/ poly ethylene glycol (PEG) nanocomposite with different content of titanium nitrate nanoparticle (TiN NPs). This nanocomposite was analyzed to use a Spectrophotometry with a spectral region of 200-800 nm. The absorption enhances when the added TiN NPs to the polymeric matrix which may be used for various applications such as optoelectronic detector. The optical energy gap for indirect transition (allowed and forbidden) decreased as TiN NPs content increases. Moreover, all optical constants have been determined.

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Section: Resultsmentioning

confidence: 99%

Effect of Titanium Nitrate Nanoparticles on Optical Properties of PVA/PEG Blend for Optoelectronics Detectors

Mohammed¹,

Abdullah²,

Hassan³

et al. 2022

RCME

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“…The optical conductivity of blend rises with the increase in MnO2 NPs ratio and photon energy. The rise in optical conductivity as MnO2 NPs ratio increase due to reduce the energy gap [27][28]. [29,30].…”

Section: A D C Bmentioning

confidence: 99%

Influence of MnO2 Nanoparticles Addition on Structural, Optical and Dielectric Characteristics of PVA/PVP for Pressure Sensors

Algidsawi¹,

Hashim

Hadi

et al. 2022

Phys. Chem. Solid St.

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Films of PVA/PVP/MnO2 nanostructures were fabricated for pressure sensors fields with lightweight, flexible and low cost compare with other sensors. The structure, dielectric and optical characteristics of PVA/PVP/MnO2 nanostructures have been studied. The results showed that the dielectric constant, dielectric loss and A.C electrical conductivity of PVA/PVP blend are enhanced with the increase in MnO2 NPs content. The dielectric constant and dielectric loss decrease while the A.C electrical conductivity increases with the increase in frequency. The optical characteristics of PVA/PVP/MnO2 nanostructures showed that the absorbance was rise with increasing of the MnO2 NPs content. The indirect energy gap of PVA/PVP blend was reduced with increase in MnO2 NPs content. The optical constants of blend are changed with the increase in MnO2 NPs content. The pressure sensor application results of PVA/PVP/MnO2 nanostructures showed that the electrical capacitance (Cp) increases with the rise in applied pressure.

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“…Due to their strong brightness and good quantum yield, cadmium selenide (CdSe) QDs are more widely used than other QD types. Due to its exceptional incident photon to carrier efficiency and enhanced photo physical, photochemical, and electrochemical capabilities, cadmium selenide (CdSe) has been chosen as the most promising choice for nanocomposite materials 10,11 .High-quality CdSe-based quantum dots are ideal fluorescent tag candidates for solar cells, single-electrode transistors, light-emitting diodes, laser materials, and biological imaging 1,12 . The distinct size dependence of quantum dots distinguishes them from all other bulk materials because of quantum confinement 13 .…”

Section: Introductionmentioning

confidence: 99%

Luminescence Study of CdSe Quantum Dots Using Machine Learning Techniques

2023

ijcih

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The photoluminescence study of synthesized CdSe quantum dots and comparison with literature based on machine learning (ML) techniques are studied in this paper. Quantum dot is a promising photovoltaic material for thin film solar cells and also shows power superior lasing efficiency higher than existing quantum-well devices. It is possible to create a quantum dot that can generate and absorb energy across the whole solar spectrum. Quantum dots (QDs) are special in a variety of applications due to their distinct size-dependent band gap. Since their photo luminescent properties can be considerably enhanced by optimization of the techniques by which they are synthesized, and are useful in application of optoelectronic disciplines. X-ray diffraction and photoluminescence were used to determine how CdSe quantum dots formed. Later the particle size is calculated by the Debye-Scherrer equation. Because of the quantum confinement effect and size variation, the FWHM of the CdSe samples exhibit greater values in photoluminescence than an ordinary bulk semiconductor, which is also in accordance to the literature based on ML techniques.

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Alteration of structural, optical and electrical properties of CdSe incorporated polyvinyl pyrrolidone nanocomposite for memory devices

Cited by 26 publications

References 88 publications

Effect of Titanium Nitrate Nanoparticles on Optical Properties of PVA/PEG Blend for Optoelectronics Detectors

Effect of Titanium Nitrate Nanoparticles on Optical Properties of PVA/PEG Blend for Optoelectronics Detectors

Influence of MnO2 Nanoparticles Addition on Structural, Optical and Dielectric Characteristics of PVA/PVP for Pressure Sensors

Luminescence Study of CdSe Quantum Dots Using Machine Learning Techniques

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