Synthesis and characterization of a copolymer involving PVK and MEH-PPV for organic electronic devices

Abbassi, F.; Mbarek, Mohamed; Kréher, David; Alimi, K.

doi:10.1016/j.jpcs.2016.11.018

Cited by 10 publications

(20 citation statements)

References 21 publications

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“…We recall that the spin density calculation was performed after optimization in the oxidized state. It is important to take into account that the experimental infrared curve of the PVK-F8T2 has shown a formation of bicarbazole units following the oxidation reaction using FeCl 3 , which is known as cross-linking phenomenon [ 38 , 39 ]. Thus, the suggested model structure of PVK-F8T2 is comprised of two carbazoles (PVK) 2 units with a dihedral angle around 40° linked to a chain or chains of F8T2 with a dihedral angle around 140°, as shown in Figure 2 .…”

Section: Experimental and Theoretical Resultsmentioning

confidence: 99%

Complementary Study Based on DFT of Optical and Electronic Properties of New Copolymer PVK-F8T2

et al. 2021

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This article is mainly a complementary study of a novel part of π-conjugated copolymers based on the poly (N-vinylcarbazole) (PVK) and poly (9,9-dioctylfluorene-co-bithiophene) (F8T2) unit based on the Density Functional Theory (DFT) and Time-Dependent Density Functional Theory (TD-DFT). This study is carried out to explore the structural and optoelectronic characteristics of a new organic material named PVK-F8T2. First, the structural, optical (absorption, photoluminescence, optical transition), electronic (molecular orbital (MO), energy-level diagram) and vibratory parameters of infrared (IR) were computed and compared with experimental studies. In addition, we calculated the level energy of the excited states and their corresponding transitions. Obviously, electronic parameters such as highest occupied and lowest unoccupied molecular orbital (HOMO and LUMO), ionization potential (IP), electronic affinity (EA) and the energy band gap (Eg) were computed in order to elucidate the intramolecular charge transport and to establish the energetic diagrams of the PVK-F8T2 copolymer for different states. The results obtained looked with precision at future optoelectronic applications. From these results, we have shown that the PVK-F8T2 has significant optoelectronic properties and seems usable as an active layer in organic light-emitting diodes (OLEDs).

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Section: Experimental and Theoretical Resultsmentioning

confidence: 99%

Complementary Study Based on DFT of Optical and Electronic Properties of New Copolymer PVK-F8T2

et al. 2021

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“…Although the PL spectra of the PVK-MEH-PPV copolymer [23] and the compo were obtained under the same experimental conditions at RT, there were no major ferences between them compared to the two normalized PL spectra (Figure 5a). However, the difference in the ratio of the I495/I460 bands of 1.2 in the copolyme 1.4 in the case of the composite should be noted; it could be explained by the cha transfer population from the 460 to 495 nm peaks.…”

Section: Optoelectronic Propertiesmentioning

confidence: 89%

“…The thermal gravimetric analysis (TGA) of the PCBM, copolymer and composite was undertaken with a TGAQ50 (TA Instruments) managed by a heat control program [23]. TGA measurements were recorded under a nitrogen atmosphere between 20 • C and 800 • C. The infrared (IR) spectra were recorded using a Nicolet iS10 infrared spectrometer [23]. A small amount of composite was put on a platinum substrate and then the IR measurements were registered using a diamond connected to the OMNIC software package.…”

Section: Characterization Methodsmentioning

confidence: 99%

“…The poly [2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) (M n 40,000-70,000), poly(N-vinylcarbazole) (PVK) (M n 25,000-50,000), [6,6]-phenyl-C61-butanoate de methyle (PCBM), ferrichloride (FeCl 3 ), chloroform, ethanol and hydrazine used for the synthesis of the composite were purchased from Sigma Aldrich [23]. It is important to recall that we have previously discussed a PVK-MEH-PPV copolymer with 57% polymerization yield.…”

Section: Preparation Of Composite (Pvk-meh-ppv/pcbm)mentioning

confidence: 99%

“…Figure 4 illustrates the optical absorption spectra of the copolymer [23], the and the composite recorded at RT. Although the PL spectra of the PVK-MEH-PPV copolymer [23] and the composite were obtained under the same experimental conditions at RT, there were no major differences between them compared to the two normalized PL spectra (Figure 5a).…”

Section: Optoelectronic Propertiesmentioning

confidence: 99%

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Photophysical Properties of the PVK-MEH-PPV/PCBM Composite for Organic Solar Cells Application: Synthesis, Characterization and Computational Study

et al. 2021

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The physical and chemical properties of a new organic composite including PVK-MEH-PPV bi-block copolymer and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) were recorded. The functionalization and the charge transfer that occurs between donor and acceptor were examined and computed. In fact, the stationary and time-resolved photoluminescence properties were used to examine the effect of the PCBM on the optical properties of the PVK-MEH-PPV matrix. The photoluminescence quenching accompanied by faster PL decay confirmed the charge transfer and interaction process. The electrical and optoelectronic properties and the charge carriers’ injection in the resulting composite were examined. The experimental conclusion was corroborated and confirmed by a calculation based on density functional theory (DFT). Hence, the combination of experimental and theoretical results indicated that the result composite can be applied as an active layer for organic solar cells.

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A Deeper Investigation of New Organic Nanocomposite System MEH‐PPV‐P3HT/SWCNT for Optoelectronic Applications

Mbarek,

Ltayef,

Almoneef

et al. 2024

J of Applied Polymer Sci

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This work aims to experimentally investigate the elaborated nanocomposite based on the MEH‐PPV‐P3HT copolymer as a donor, which blended with the SWCNTs as an acceptor with different weight concentrations (1%, 3%, and 5% of SWCNTs). Various characterization techniques have been performed to analyze the effect of varying the SWCNTs' weight and the interaction between the two materials. The morphological and vibrational analysis were carried out using transmission electron microscopy (TEM) and Raman's spectroscopy, which indicate the dispersion of the SWCNT in the copolymer matrix. To analyze the optical properties, UV–visible, photoluminescence, and time‐resolved photoluminescence techniques have been used. To ascertain the influence of the SWCNTs addition, a comparative study between the resulting nanocomposite, basic copolymer, and various SWCNT concentrations has been examined. The results that have been accomplished demonstrate that the mixing between the copolymer MEH‐PPV‐P3HT and the SWCNTs reduces the band gap energy to be equal to 1.7 eV enhancing the charge transfer (CT) process and increases the absorption volume in the visible range. An increment in the average decay time compared to the MEH‐PPV‐P3HT has been noticed which improves the non‐radiative luminescence process. To analyze the intermolecular interaction, theoretical modeling using density functional theory (DFT) has been performed.

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Synthesis and characterization of a copolymer involving PVK and MEH-PPV for organic electronic devices

Cited by 10 publications

References 21 publications

Complementary Study Based on DFT of Optical and Electronic Properties of New Copolymer PVK-F8T2

Complementary Study Based on DFT of Optical and Electronic Properties of New Copolymer PVK-F8T2

Photophysical Properties of the PVK-MEH-PPV/PCBM Composite for Organic Solar Cells Application: Synthesis, Characterization and Computational Study

A Deeper Investigation of New Organic Nanocomposite System MEH‐PPV‐P3HT/SWCNT for Optoelectronic Applications

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