Studies on Optical Characteristics of Multicolor Emitting MEH-PPV/ZnO Hybrid Nanocomposite

Shankar, J.; Kumar, Sangeetha Ashok; Periyasamy, Bhuvana K.; Nayak, Sanjay K.

doi:10.1080/03602559.2018.1466171

Cited by 10 publications

(9 citation statements)

References 22 publications

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“…The sample’s crystallinity was slightly enhanced upon incorporation of the ZnO NPs as evidenced from the narrowing the broad band of the MDMO-PPV–DMP. The broad band became clearer and less broadening with the increase of the ZnO NPs content, confirming the incorporation of ZnO NPs into the MDMO-PPV–DMP matrix and the nanocomposite structure formation [ 11 ]. Moreover, the broad band of MDMO-PPV–DMP was hardly observed in the diffractograms of the hybrid 50MZNCs due to lower scattering factors compared to ZnO NPs.…”

Section: Resultsmentioning

confidence: 92%

“…The bands at 1472 and 1354 cm −1 refer to antisymmetric and symmetric alkyl CH 2 , respectively. The peaks at 1252, 1202, and 1040 cm −1 are associated with C-O stretching in ether groups, phenyl oxygen stretch, and alkyl oxygen stretch, respectively [ 11 , 14 ]. The bands at 957 cm −1 and 855 cm −1 are associating with trans double bond vinylene C-H wagging and phenyl C-H wagging, respectively, which indicates the dipole normal to the phenyl vinyl plane [ 15 ].…”

Section: Resultsmentioning

confidence: 99%

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Photophysical Characteristics of Multicolor Emitting MDMO-PPV–DMP/ZnO Hybrid Nanocomposites

2022

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The tuning of photophysical properties of the poly[2-methoxy-5-(3,7-dimethyl-octyloxy)-1,4-phenylenevinylene]—end capped with dimethylphenyl (DMP), MDMO-PPV–DMP, was achieved by incorporation of ZnO NPs with various contents. Hybrid nanocomposites of MDMO-PPV–DMP with ZnO NPs were prepared by solution blending method and then deposited onto glass substrates. The structural properties of the hybrid nanocomposites samples were characterized using X-ray diffraction, FTIR, and FE-SEM, while their optical properties were extracted from the absorption and photoluminescence spectra. The energy band gap, energy tail, steepness parameter, and CIE chromatic coordinates were tuned by increase the content of ZnO NPs into the polymer matrix. The ZnO NPs incorporation assists the emission wavelength shift and multicolor emitting from the hybrid nanocomposites.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Photophysical Characteristics of Multicolor Emitting MDMO-PPV–DMP/ZnO Hybrid Nanocomposites

2022

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“…The profiles were identical to those of the The complex refractive index (N = n + ik) is a function of two parts, real and imaginary, where n is the real part of the refractive index and k is the imaginary part. The k value can be determined from experimentally measured parameters such as α(λ) using the equation k = αλ/4π, and the n(λ) value can be calculated in terms of R using n = (1+ √ R)/(1− √ R) for the perpendicular incidence of light with respect to the film plane [43]. The wavelengthdependent functions k(λ) and n(λ) are presented in Figure 7a,b, respectively, for the pure and composite thin films.…”

Section: Optical Properties Of the Pure Pqds And The Eva-tpr/pqd Comp...mentioning

confidence: 99%

“…The photoconductivity is important because it reveals information about the optical carrier generation, transport, and recombination processes within a device. The optical conductivities of the pure and composite PQDs are compared in Figure 9 and were calculated using σ ph = αnc 4π [43]. The composite had a higher optical conductivity at all photon excitation energies, except for a small difference above 3.00 eV in the UV region.…”

Section: Optical Properties Of the Pure Pqds And The Eva-tpr/pqd Comp...mentioning

confidence: 99%

Encapsulated Passivation of Perovskite Quantum Dot (CsPbBr3) Using a Hot-Melt Adhesive (EVA-TPR) for Enhanced Optical Stability and Efficiency

et al. 2021

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The notable photophysical characteristics of perovskite quantum dots (PQDs) (CsPbBr3) are suitable for optoelectronic devices. However, the performance of PQDs is unstable because of their surface defects. One way to address the instability is to passivate PQDs using different organic (polymers, oligomers, and dendrimers) or inorganic (ZnS, PbS) materials. In this study, we performed steady-state spectroscopic investigations to measure the photoluminescence (PL), absorption (A), transmission (T), and reflectance (R) of perovskite quantum dots (CsPbBr3) and ethylene vinyl acetate/terpene phenol (1%) (EVA-TPR (1%), or EVA) copolymer/perovskite composites in thin films with a thickness of 352 ± 5 nm. EVA is highly transparent because of its large band gap; furthermore, it is inexpensive and easy to process. However, the compatibility between PQDs and EVA should be established; therefore, a series of analyses was performed to compute parameters, such as the band gap, the coefficients of absorbance and extinction, the index of refractivity, and the dielectric constant (real and imaginary parts), from the data obtained from the above investigation. Finally, the optical conductivities of the films were studied. All these analyses showed that the EVA/PQDs were more efficient and stable both physically and optically. Hence, EVA/PQDs could become copolymer/perovskite active materials suitable for optoelectronic devices, such as solar cells and perovskite/polymer light-emitting diodes (PPLEDs).

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“…A. Bernanos and coworkers at Nancy University in France noted electroluminescence in organic materials in the early 1950s when materials such as acridine orange were exposed to a high alternating voltage [8]. In 1960, M. Pope and some of his co-workers at New York University produced contacts for an Ohmic electrode with a dark injection of organic crystals [9]. One of the prominent landmarks in history is the invention of the organic luminescent device with a thin green double-layer film [10].…”

Section: Introductionmentioning

confidence: 99%

Structural and Morphological Characterization of MEH-PPV Nanocomposite Doped with FeCl3

Jabbar

Hussein

2022

IJP

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Poly [2-methoxy-5-(2-ethylhexyloxy)-1, 4-phenylenevinyl] (MEH-PPV) thin films were created in this study using both spin coating and drop casting processes. MEH-PPV thin films generated by Ferric Chloride (FeCl3) doping (0.03, 0.06, 0.09, and 0.12 wt%) were studied for some physical features using Fourier-Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FE-SEM), and Energy Dispersive X-ray Spectroscopy (EDX). An FTIR test showed that there was no chemical reaction that occurred between Ferric Chloride (FeCl3) and MEH-PPV, but rather a physical one, that is, an organic material composite occurred. As for FE-SEM, the pure sample MEH-PPV formed uniformly, but when FeCl3 was added by weight, we have different circles that indicate the formation of adsorption energy and that the highest adsorption energy appears at MEH-PPV/FeCl3 (0.06%), as well as EDX, which indicates the absence of undesirable elements and indicates the presence of small peaks for iron (Fe) and chlorine (Cl). Peaks of carbon(C) and oxygen (O) types indicate the presence of the chemical elements of MEH-PPV.

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Studies on Optical Characteristics of Multicolor Emitting MEH-PPV/ZnO Hybrid Nanocomposite

Cited by 10 publications

References 22 publications

Photophysical Characteristics of Multicolor Emitting MDMO-PPV–DMP/ZnO Hybrid Nanocomposites

Photophysical Characteristics of Multicolor Emitting MDMO-PPV–DMP/ZnO Hybrid Nanocomposites

Encapsulated Passivation of Perovskite Quantum Dot (CsPbBr3) Using a Hot-Melt Adhesive (EVA-TPR) for Enhanced Optical Stability and Efficiency

Structural and Morphological Characterization of MEH-PPV Nanocomposite Doped with FeCl3

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