Photoluminescence properties of new poly(<i>N</i>‐vinylcarbazole)‐3‐methylthiophene (PVK‐3MeT) graft copolymer

Chemek, Mourad; Massuyeau, Florian; Wéry, J.; Hlel, A.; Ayachi, S.; Faulques, Eric; Lefrant, S.; Alimi, K.

doi:10.1002/app.35074

Cited by 6 publications

(6 citation statements)

References 29 publications

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“…PL kinetics of PVK, copolymer and PPV, spectrally integrated between 300 nm and 700 nm. The PL normalized intensity decay times are very well simulated with two exponential decays and by taking into account the contribution of apparatus function including the Gaussian temporal dependence G ( t ) of the laser pulse, as previously reported

\frac{d n_{1}}{d t} = G (t) - β_{1} n_{1}

\frac{d n_{2}}{d t} = G (t) - β_{2} n_{2}

where n 1 and n 2 are the populations of the excited states levels 1 and 2, their decay times τ 1 and τ 2 respectively.…”

Section: Resultssupporting

confidence: 58%

“…

\frac{d n_{1}}{d t} = G (t) - β_{1} n_{1}

\frac{d n_{2}}{d t} = G (t) - β_{2} n_{2}

where n 1 and n 2 are the populations of the excited states levels 1 and 2, their decay times τ 1 and τ 2 respectively. In this simple model, the populations of levels 1 and 2 are coupled in order to account indirectly for a migration process from the short to the long conjugated segments. These populations include photogenerated charges recombining radiatively and nonradiatively.…”

Section: Resultsmentioning

confidence: 99%

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New copolymer of poly(N‐vinylcarbazole) and poly(p‐phenylenevinylene) for optoelectronic devices

Mbarek

Massuyeau

Duvail

et al. 2013

J of Applied Polymer Sci

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International audienceA novel diblock copolymer based on poly(N-vinylcarbazole) PVK and poly(p-phenylenevinylene) (PPV) precursor was synthesized by oxidative cross-linking. The grafting of PPV with PVK moieties was elucidated by infrared absorption analysis. A structural study by X-ray diffraction and a morphological study of the copolymer by scanning and transmission electron microscopy reveal a multiscale one-dimensional self-organization both at the molecular and at the sub-micrometric level. The resulting copolymer exhibits original optical properties compared to those of PVK and PPV ones and presents an improved thermal behavior

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\frac{d n_{1}}{d t} = G (t) - β_{1} n_{1}

\frac{d n_{2}}{d t} = G (t) - β_{2} n_{2}

where n 1 and n 2 are the populations of the excited states levels 1 and 2, their decay times τ 1 and τ 2 respectively.…”

Section: Resultssupporting

confidence: 58%

“…

\frac{d n_{1}}{d t} = G (t) - β_{1} n_{1}

\frac{d n_{2}}{d t} = G (t) - β_{2} n_{2}

Section: Resultsmentioning

confidence: 99%

New copolymer of poly(N‐vinylcarbazole) and poly(p‐phenylenevinylene) for optoelectronic devices

Mbarek

Massuyeau

Duvail

et al. 2013

J of Applied Polymer Sci

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show abstract

“…These results are essentially due to different photo-generated species under laser wavelength excitation going from solutions to thin films. Indeed, previous studies [6,29,30] show that the strong macromolecular interactions in the condensed state favor the migration of the photo-generated species from short chains to longer ones leading to photoluminescence quenching [6,28,29]. The effect of the chemical grafting of anthracene units into the backbone of the prepared OMPA oligomer on the photo-physical properties is observed in the solution or condensed state.…”

Section: -5-transient Photoluminescence Observationsmentioning

confidence: 96%

“…Indeed, an augmentation in EL intensity and an increase in the effi of the prepared electroluminescent devices based on conjugated-non-conjugated sequences were observed [3,4]. Recently in our laboratory, an improvement of the luminescence properties in solution and solid state (thin fi was observed when the non-con-jugated poly(9-vinylcarbazole) (PVK) was added in the chemical synthesis of poly(3-alkylthiophenes) [5,6]. The preparation of organic light-emitting diodes with blue emission is of great interest.…”

Section: Introductionmentioning

confidence: 99%

Chemical insertion of anthracene moiety into the backbone of a newly synthesized oligophenylene (OMPA): effect on the photo-physical properties

Chemek¹,

Chebil²,

Amor

et al. 2021

Res Chem Intermed

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The newly synthesized oligo [4-(methoxyphenyl) acetonitrile] (OMPA) was chemically modified by Knoevenagel condensation of OMPA oligomer with 9-anthraldehyde. The obtained oligomer is named OMPA-ANTH. Vibrational, optical, and thermodynamic properties of OMPA-ANTH oligomer were investigated using FT-IR, ultraviolet-visible (UV-vis), steady-state and time-resolved photoluminescence spectroscopies, and thermogravimetric analysis (TGA). The chemical insertion of the anthracene group into the OMPA backbone induces a decrease of the optical bandgap and the energy gap (E g = E HOMO -E LUMO ) with significant modification in their observed optical properties. The decay of modified OMPA (OMPA-ANTH) in solution or condensed state is slower than that of pure OMPA, showing a change of the photo-generated species with longer lifetime upon chemical modification.

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“…The new polythiophene derivative is named PVK-MeT [15]. Photophysical investigations based essentially on spectroscopic analysis show a great enhancement in the luminescence properties, which encourage the investigation of the new material for a new generation of OLED devices [15,16]. On the other hand, we present the chemical synthesis of a new blue-emitted organic small molecule [17].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Experimental and Theoretical Investigations on the Optical and Electronic Properties of New Organic Active Layer for a New Generation of Organic Light-Emitting Diode

Chemek¹,

Mabrouk²,

Braieck³

et al. 2022

Nanocomposite Materials for Biomedical and Energy Storage Applications

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In this chapter, we present new attempts for the development of a new generation of high-performance organic light-emitting diodes (OLEDs). First of all, we present two strategies for obtaining a luminescent active layer. The first one is the chemical synthesis of a block copolymer based on the cross-linked Poly (N-vinyl carbazole) (PVK) and the conjugated poly(3-methylthiophene) (PMeT) system. Secondly, newly small luminescent organic molecules are chemically synthesized and studied. Photo-physical and electronic properties of the synthesized organic materials are fully investigated through experimental analysis and theoretical computations using essentially DFT and TDDFT methodologies. Optical measurements revealed the formation of a new highly luminescent organic material. Furthermore, the newly synthesized small molecules showed a high emission in the blue part. Based on the synthesized active layers, newly multi-structure OLED architectures are theoretically designed by the insertion of a single-walled carbon nanotube (SWCNTs) as a single layer. The theoretical computations show that the insertion of single-walled carbon nanotubes (SWCNTs) single layer improves the injection of electron charge carriers from the chosen cathode (Ca, Mg) to the synthesized active layers, which enhances the performance of the electronic focused devices based on the organic synthesized active layer.

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Photoluminescence properties of new poly(N‐vinylcarbazole)‐3‐methylthiophene (PVK‐3MeT) graft copolymer

Cited by 6 publications

References 29 publications

New copolymer of poly(N‐vinylcarbazole) and poly(p‐phenylenevinylene) for optoelectronic devices

New copolymer of poly(N‐vinylcarbazole) and poly(p‐phenylenevinylene) for optoelectronic devices

Chemical insertion of anthracene moiety into the backbone of a newly synthesized oligophenylene (OMPA): effect on the photo-physical properties

Synthesis, Experimental and Theoretical Investigations on the Optical and Electronic Properties of New Organic Active Layer for a New Generation of Organic Light-Emitting Diode

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