On characteristics of PVA/CdS and PVA/CdS:Cu nanocomposites for applications as LED

Kakati, Jumi; Datta, Pranayee

doi:10.1016/j.jlumin.2012.12.029

Cited by 14 publications

(8 citation statements)

References 30 publications

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“…This can be solved by tailoring the geometry of the lens or texturing the surface of the materials upon processing. v) Processing and Matrix Materials : Easy lens molding at low temperature as well as easy patterning or texturing of the surface, chemical compatibility with the phosphor, high photoresistance and thermal‐resistance with respect to the structural properties and transmittance, refractive index, etc., and good encapsulation features against moisture. So far, polymer matrices, epoxies, and silicones require a solidification process involving electrochemical cross‐linking, gamma or UV curing, and thermal curing reactions . Ideally, the matrix should be biodegradable and should cure under ambient conditions without chemical cross‐linking reactions to avoid phase separation or chemical degradation of the organic phosphors.…”

Section: Ileds Oleds and Lecs Based On Biological Materialsmentioning

confidence: 99%

Merging Biology and Solid‐State Lighting: Recent Advances in Light‐Emitting Diodes Based on Biological Materials

Fresta

Fernández-Luna

Coto

et al. 2018

Adv Funct Materials

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Solid-state lighting (SSL) is one of the biggest achievements of the 20 th century. It has completely changed our modern life with respect to general illumination (light-emitting diodes), flat devices and displays (organic lightemitting diodes), and small labeling systems (light-emitting electrochemical cells). Nowadays, it is however mandatory to make a transition toward green, sustainable, and equally performing lighting systems. In this regard, several groups have realized that the actual SSL technologies can easily and efficiently be improved by getting inspiration from how natural systems that manipulate light have been optimized over millennia. In addition, various natural and biocompatible materials with suitable properties for lighting applications have been used to replace expensive and unsustainable components of current lighting devices. Finally, SSL has also started to revolutionize the biomedical field with the achievement of efficient implantable lighting systems. Herein, the-state-of-art of (i) biological materials for lighting devices, (ii) bioinspired concepts for device designs, and (iii) implantable SSL technologies is summarized, highlighting the perspectives of these emerging fields.

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Section: Ileds Oleds and Lecs Based On Biological Materialsmentioning

confidence: 99%

Merging Biology and Solid‐State Lighting: Recent Advances in Light‐Emitting Diodes Based on Biological Materials

Fresta

Fernández-Luna

Coto

et al. 2018

Adv Funct Materials

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“…The wide range of PVA applications can be even more extended by incorporation of filler into PVA matrix, because well-dispersed filler may enhance various physical properties of the host polymer [9]. Since PVA can effectively protect the NPs from aggregation [10,11], numerous reports in the literature show attempts for synthesis and characterization of different NPs doped in PVA film [12][13][14][15][16][17]. The characteristics of these nanocomposite films can be manipulated by varying the particle size, shape, and concentration of NPs.…”

Section: Introductionmentioning

confidence: 99%

Optical and structural investigation of synthesized PVA/PbS nanocomposites

Abdullah

Tahir

Kadir

2015

J Mater Sci: Mater Electron

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Polymer nanocomposite based on polyvinyl alcohol (PVA) and lead sulfide (PbS) in the average radius of (1.88-2.23) nm, have been synthesized using the chemical reduction rote and solution casting technique for different concentrations of PbS. The characterization of the polymer nanocomposite films were carried out using UVvisible spectroscopy, SEM, and XRD. The effect of various concentration of PbS NP on the optical properties of the composite has been studied to understand the optimum conditions for the synthesis process. The nanocomposite film shows high UV and visible light absorptions in the wavelength range of (200-500) nm, which correspond to the characteristics of the PbS NPs. The significant decreasing trend of the direct allowed band gap of the nanocomposite was observed upon increasing the Pb source concentration, from (6.27 eV) for pure PVA to (2.34 eV) for 0.04 M PbS concentration, which is much higher than the energy gap of bulk PbS value (0.41 eV). The calculated values of the static refractive index of Cauchy dispersion model were in the range of (1.09-1.20).X-ray diffraction analysis confirmed the cubic nanocrystalline PbS phase formation.

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“…the wurtzite structure respectively. [19,20] The Fast Fourier Transform (FFT) patterns in the insets of as shown in Fig. 1(h).…”

Section: Structural and Optical Characterizationmentioning

confidence: 99%

Preparation and photoelectric properties of cadmium sulfide quantum dots

Tang

Guo

et al. 2019

Chinese Phys. B

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Cadmium sulfide quantum dots (CdS QDs) are widely used in solar cells, light emitting diodes, photocatalysis and biological imaging because of their unique optical and electrical properties. However, there are some drawbacks in existing preparation techniques of CdS QDs, such as protection of inert gas, lengthy reaction time, high reaction temperature, poor crystallinity and non-uniform particle size distribution. In this study, we prepared CdS QDs by liquid phase synthesis under ambient room temperature and atmospheric pressure using sodium alkyl sulfonate, CdCl 2 and Na 2 S as capping agent, cadmium and sulfur sources respectively. The technique offers facile preparation, efficient reaction, low-cost, and controllable particle size. The as-prepared CdS QDs exhibited good crystallinity, excellent monodispersity and uniform particle size. The responsivity of CdS QDs based photodetector was greater than 0.3 μA/W, which makes them suitable for use as UV detector.

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On characteristics of PVA/CdS and PVA/CdS:Cu nanocomposites for applications as LED

Cited by 14 publications

References 30 publications

Merging Biology and Solid‐State Lighting: Recent Advances in Light‐Emitting Diodes Based on Biological Materials

Merging Biology and Solid‐State Lighting: Recent Advances in Light‐Emitting Diodes Based on Biological Materials

Optical and structural investigation of synthesized PVA/PbS nanocomposites

Preparation and photoelectric properties of cadmium sulfide quantum dots

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