Photoluminescence properties of new PPV derivatives

Massuyeau, Florian; Faulques, Eric; Lefrant, S.; Majdoub, Mustapha; Ghedira, M.; Alimi, K.; Wéry, J.

doi:10.1016/j.jlumin.2011.02.010

Cited by 25 publications

(16 citation statements)

References 32 publications

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“…The TR-PL normalized intensity decay (Figures 11 and 12) fit very well with two coupled exponential decays as previously reported [27]. The solid lines represent the curve fits.…”

Section: Time-resolved Photoluminescence (Tr-pl)supporting

confidence: 82%

“…This assumption was supported by the lower thermal stability of the modified oligomer relatively to OMPA [26]. Finally, a faster degradation was observed from 450 °C, corresponding to the polyphenylene backbone degradation as previously described [27]. …”

Section: Thermal Studysupporting

confidence: 75%

“…We used a simple model with two excited levels [27]. The populations, n 1 and n 2 , of the excited states levels 1 and 2 have respective lifetimes τ 1 and τ 2 .…”

Section: Time-resolved Photoluminescence (Tr-pl)mentioning

confidence: 99%

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Synthesis and Optical Study of a New Oligophenylene

et al. 2012

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Abstract:A new substituted oligophenylene was prepared by the Knoevenagel condensation of 4-methoxybezaldehyde with a functionalized oligophenylene (OMPA). The latter was obtained by (4-methoxy phenyl) acetonitrile electrochemical oxidation. The resulting modified oligomer was characterized by various spectroscopic techniques: NMR, FTIR and UV. The thermal study showed that the modified material exhibited a lower thermal stability compared with OMPA. Finally, the optical study revealed that in solution, the emission was red-shifted when compared with the non-modified oligomer emission and that the optical gap changed from 3.1 eV to 2.75 eV. In thin layer solid state, photoluminescence was again red-shifted by 120 nm, which is probably due to an interaction between the oligomer chains. In addition, a transient photoluminescence study was undertaken for the synthesized materials. It showed that the lifetimes of the photo-generated species were shortened by the conjugation extension in the modified oligomer and by the inter-chain interactions in the solid state. OPEN ACCESSPolymers 2012, 4 1227

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“…The TR-PL normalized intensity decay (Figures 11 and 12) fit very well with two coupled exponential decays as previously reported [27]. The solid lines represent the curve fits.…”

Section: Time-resolved Photoluminescence (Tr-pl)supporting

confidence: 82%

Section: Thermal Studysupporting

confidence: 75%

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Synthesis and Optical Study of a New Oligophenylene

et al. 2012

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“…This is characteristic of an emission process resulting mainly from singlet intrachain excitons 24. As in the case of PPV films, this is the photogeneration of singlet intrachain excited states24, 25 that seems to be the dominant product of the photoexcitations in this copolymer film.…”

Section: Resultsmentioning

confidence: 80%

“…These trends make us believe that the nonradiative process become less important in film and in solution compared to that in powder. In fact, focused studies on the optical properties of various PPV derivatives in different morphologic states (film, nanofiber…), show that the increase of the decay times is accompanied by the increasing of the QY efficiency,24, 25 and followed with an increase in the PL intensity. The some phenomena are observed in our case when going from PVK‐3MeT powder to PVK‐3MeT film and solution (Fig.…”

Section: Resultsmentioning

confidence: 99%

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

Chemek

Massuyeau

Wéry

et al. 2011

J of Applied Polymer Sci

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International audienceSteady-state and time-resolved photoluminescence (TRPL) measurements are used in order to investigate the emission properties of new graft copolymer involving poly(N-vinylcarbazole) (PVK) and poly(3-methylthiophene) (PMeT) named PVK-3MeT. The photo-generated species in PVK-3MeT are identified as singlet intrachain excitons. Furthermore, radiative and nonradiative lifetimes have been calculated. The observed changes in the photo-physical properties of the different condensed phases could be directly related to the nanostructure of the material. The use of PVK in the chemical synthesis allows the obtaining of a new organic material with better emission and slowly radiative recombination compared to those of polythiophenes indicating that the radiative channel is more enhanced

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Template process for engineering the photoluminescence of PVK and PPV‐based nanowires

Mbarek

Garreau

Massuyeau

et al. 2019

J of Applied Polymer Sci

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Blends or stacking layers of two complementary materials are the dominant methods to get a strong donor-acceptor behavior for in-solution-processed thin film devices. These methods result in different local arrangement of the two species, a central point for tuning the donor-acceptor. In this work, it is proposed to organize a donor (poly[vinylcarbazole], PVK) and an acceptor (poly[para-phenylenevinylene], PPV) in a nanowire geometry. A two-step template process was used to fabricate coaxial nanowires with PPV and PVK alternatively as the core or the shell material, as shown by morphological characterization and micro-Raman spectroscopy study. The differences of the photoluminescence properties of these two types of coaxial nanowires compared with those of PVK-PPV blend nanowires and of pure PPV and PVK nanowires are discussed by considering the local polymer arrangement and the exciton diffusion length. Nano-sources, as well as nanostructured light emitting diodes, could take advantage of this 1D-like morphology for light emission control.

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Photoluminescence properties of new PPV derivatives

Cited by 25 publications

References 32 publications

Synthesis and Optical Study of a New Oligophenylene

Synthesis and Optical Study of a New Oligophenylene

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

Template process for engineering the photoluminescence of PVK and PPV‐based nanowires

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