Star-shaped polyfluorene: Design, synthesis, characterization and application towards solar cells

Chakraborty, Chanchal; Layek, Animesh; Ray, Partha Pratim; Malik, Sudip

doi:10.1016/j.eurpolymj.2014.01.008

Cited by 24 publications

(14 citation statements)

References 50 publications

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“…It can be concluded that the tested preliminary compound 4a exhibited photovoltaic activity; however, we are aware that the PCE value is significantly lower than that of a BHJ PV cell based on P3HT and the typical acceptor phenyl‐C 61 ‐butyric acid methyl ester (PCBM). Although the device PCE is not in the top performance bracket, star polymers based on fluorene–arylimide derivatives exhibited PCEs in the range 0.04–0.26 % with V OC ≈ 0.50 V and FF ≈ 0.40 20. Our results illustrate that these quinoline derivatives could be promising materials for optoelectronic applications.…”

Section: Resultsmentioning

confidence: 81%

“…In addition, compounds based on D–A systems, mainly azo compounds, show interesting nonlinear optical (NLO) properties with special regard to application as optical limiting materials 15,16. In compounds based on D–A systems, fluorenes and their derivatives are broadly used as electron donors, and quinolines,17 benzotriazoles,18,19 arylimides,20 and cyanoacetic acid21 functions are used as acceptor moieties. Fluorenes, polyfluorenes, and their derivatives show potential in optoelectronics and photonics as blue light emitters and are used widely in OLEDs,22 as hosts in green and sky blue phosphorescent OLEDs (PhOLEDs),23–26 in solar cells (SCs),27 and in FETs 28.…”

Section: Introductionmentioning

confidence: 99%

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Small Donor–Acceptor Molecules Based on a Quinoline–Fluorene System with Promising Photovoltaic Properties

et al. 2016

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A series of small donor–acceptor (D–A) systems based on quinoline derivatives bearing a fluorenyl motif were synthesized through Ru‐catalyzed reactions. Their photophysical, electrochemical, and structural properties were investigated deeply. The photoluminescence spectra of most of the compounds were characterized by an intense band at λ ≈ 400 nm, whereas a redshifted band occurred at λ = 560 nm if the substituent of the quinoline was changed to the strongly electron‐withdrawing NO2 group. Most of the synthesized compounds exhibited appealing luminescence and electrical properties, which might make them useful materials for photovoltaics. Preliminary electrical conductivity measurements of indium tin oxide/compound/Al devices showed that the current is enhanced as the applied voltage increases and, therefore, proved the semiconducting properties of the investigated compounds. Moreover, one of the synthesized compound was tested as a component of the active layer in a bulk heterojunction (BHJ) solar cell, and a power conversion efficiency (PCE) of 0.25 % was obtained.

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Section: Resultsmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Small Donor–Acceptor Molecules Based on a Quinoline–Fluorene System with Promising Photovoltaic Properties

et al. 2016

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“…The electronic properties of semiconducting conjugated polymers continue to occupy a place of strong interest either in academic or technological fields of research, due to their multipurpose applications such as, LEDs, solar cells, and sensors to cite just a few. This class of polymers may also play a role as magnetic materials, because in nanoscale, they are of particular interest due to the growing production of high‐speed computers and high‐density storage devices, as hard disks .…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties of a polyfluorene derivative containing complexed neodymium ions

Santana

Turchetti

Zanlorenzi

et al. 2019

J Polym Sci B Polym Phys

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Poly[9,9′‐dihexylfluorene‐2,7‐diyl)‐6,6″‐(2,2′:6′,2″‐terpyridine)] (LaPPS75) and its complexes with neodymium were synthesized and characterized. Magnetic measurements showed that the noncomplexed polymer presented a ferromagnetic contribution due to the formation of π stacking, and that in absence of those, the ferromagnetic behavior is suppressed. The pristine polymer, the complexed one and a low‐molecular‐weight model compound with the same structure of the complexed site in the parent polymer were studied. The observed behavior found is presented and discussed, the most important finding was that when a conjugated chain is used as a host for the metallic ion, an amplification of four times for the magnetization is achieved, using the same metallic content for complexed polymer and model compound for comparison. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019, 57, 304–311

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“…They were used as rheology modifier and cosmetics, thermoplastic elastomers, and polymer catalysts . Besides, they find application in paper industry, petroleum industry, nanopattening process, biomedical, and solar cell applications . This class of polymers has been prepared via (i) “arm first”, (ii) “coupling onto”, and (iii) “core first” methods.…”

Section: Introductionmentioning

confidence: 99%

Dendritic‐Linear Hybrid Multiarm Star Polymers: A Straightforward Synthesis of Polymer as Molecular Nanoparticles

Nasar

Veerapandian

2015

Macro Chemistry & Physics

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Synthesis of multiarm star polymers via “core first” method but possibly through two different chain growth fashions has been described. Two distinct styrenyl‐TEMPO‐based G3 and G4 dendritic unimolecular initiators have been used for this method. Polymerization of styrene using these core‐cum‐initiators at 125 °C varying the monomer to initiator ratio and polymerization time yields multiarm star polymers with molecular weight (Mw) in the range of 1.71 × 105 to 4.75 × 105 g mol−1 and polydispersity in the range of 1.34–1.46. Hydrolysis leading to degradation of inner polyurethane core yields highly narrow dispersed—PDI 1.00 to 1.04—polystyrene chains, and the SEC‐MALLS data of these chains confirm the accurate control on predetermination in the number of arms up to 48 of star polymers. The specific refractive index increment (dn/dc) of the polymers is found to be decreased with decreasing weight fraction of core. The transmission electron microscope (TEM) and atomic force microscopy (AFM) images and hydrodynamic radius of chosen polymers confirm the two different chain growth fashions leading to the formation of star polymers as discrete nanoparticle in the case of initiator in which TEMPO is anchored and formation of peripherally low entangled short chains in the case of initiators in which TEMPO is end‐capped.

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Star-shaped polyfluorene: Design, synthesis, characterization and application towards solar cells

Cited by 24 publications

References 50 publications

Small Donor–Acceptor Molecules Based on a Quinoline–Fluorene System with Promising Photovoltaic Properties

Small Donor–Acceptor Molecules Based on a Quinoline–Fluorene System with Promising Photovoltaic Properties

Magnetic properties of a polyfluorene derivative containing complexed neodymium ions

Dendritic‐Linear Hybrid Multiarm Star Polymers: A Straightforward Synthesis of Polymer as Molecular Nanoparticles

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