Elaboration and characterization of P3HT–PEO–SWCNT fibers by electrospinning technique

Hernández-Martínez, D.; Nicho, M.E.; Alvarado-Tenorio, G.; García-Carvajal, S.; Castillo‐Ortega, M. M.; Vásquez-López, C.

doi:10.1007/s42452-020-2278-2

Cited by 11 publications

(12 citation statements)

References 33 publications

(46 reference statements)

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“…In the 2700–3100 cm −1 spectral region, the methylene and methyl stretching vibration bands from the hexyl side chains of the thiophene rings were notable. The P 3 HT polymer exhibited vibration bands at 2954 and 3054 cm −1 corresponding to the stretching and asymmetric vibrations of =C-H and C=C [ 40 , 41 ]. The band at 1260 cm −1 corresponded to the dipole-derivative vector perpendicular to the ring plane, and the band near 1048 cm −1 was due to C-H in-plane bending [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

Optimization of Sb2S3 Nanocrystal Concentrations in P3HT: PCBM Layers to Improve the Performance of Polymer Solar Cells

et al. 2021

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In this study, polymer solar cells were synthesized by adding Sb2S3 nanocrystals (NCs) to thin blended films with polymer poly(3-hexylthiophene)(P3HT) and [6,6]-phenyl-C61-butyric-acid-methyl-ester (PCBM) as the p-type material prepared via the spin-coating method. The purpose of this study is to investigate the dependence of polymer solar cells’ performance on the concentration of Sb2S3 nanocrystals. The effect of the Sb2S3 nanocrystal concentrations (0.01, 0.02, 0.03, and 0.04 mg/mL) in the polymer’s active layer was determined using different characterization techniques. X-ray diffraction (XRD) displayed doped ratio dependences of P3HT crystallite orientations of P3HT crystallites inside a block polymer film. Introducing Sb2S3 NCs increased the light harvesting and regulated the energy levels, improving the electronic parameters. Considerable photoluminescence quenching was observed due to additional excited electron pathways through the Sb2S3 NCs. A UV–visible absorption spectra measurement showed the relationship between the optoelectronic properties and improved surface morphology, and this enhancement was detected by a red shift in the absorption spectrum. The absorber layer’s doping concentration played a definitive role in improving the device’s performance. Using a 0.04 mg/mL doping concentration, a solar cell device with a glass /ITO/PEDOT:PSS/P3HT-PCBM: Sb2S3:NC/MoO3/Ag structure achieved a maximum power conversion efficiency of 2.72%. These Sb2S3 NCs obtained by solvothermal fabrication blended with a P3HT: PCBM polymer, would pave the way for a more effective design of organic photovoltaic devices.

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Section: Resultsmentioning

confidence: 99%

Optimization of Sb2S3 Nanocrystal Concentrations in P3HT: PCBM Layers to Improve the Performance of Polymer Solar Cells

et al. 2021

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“…However, its rigid backbone makes its processing by electrospinning challenging because the required level of chain entanglements to form the fibrous patterns is not favored . For this reason, the mixing of P3HT with PEO, which is highly electrospinnable, is one of the common strategies reported so far for overcoming this problem. − In one such example, randomly oriented and aligned P3HT:PEO blended electrospun nanofibers (75 wt % of P3HT) were generated to compare the electrical conductivities of the two fibrous materials. Fiber alignment was promoted by placing two metallic plates on the collector, separated by a 3 cm gap .…”

Section: Resultsmentioning

confidence: 99%

Highly Aligned Electrospun Polymer Fibers Produced Using a Corrugated Static Collector

Papaparaskeva

Papagiorgis

Itskos

et al. 2021

ACS Appl. Polym. Mater.

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Fiber alignment via electrospinning is a challenging process that requires complex optimization because of the synergistic contribution of the solution, processing, and environmental parameters. Much of the work has focused on the design of collectors that enable fiber alignment, in contrast to that of the stationary, flat collector where randomly oriented fibers are deposited. However, in most cases, the proposed collectors have either movable parts or complicated configurations. The present study focuses on a simplified design concept involving the use of a corrugated metallic collector in the production of highly aligned electrospun fibers based on three polymer systems exhibiting different physicochemical characteristics: Polyvinylpyrrolidone (PVP) (insulating), poly(3-hexylthiophene-2,5-diyl) (P3HT)-rich polymer blend (semiconducting), and poly(4-vinylpyridine-co-butyl methacrylate) (P4VPBuMA) (polyelectrolyte). The electric field profile developed in the presence of the corrugated collector was simulated by means of finite element analysis and compared to that of the conventional flat collector. Most importantly, electrospun meshes with an exceptionally high degree of alignment (up to 95%) after a prolonged electrospinning time were produced in all cases, thus demonstrating the effectiveness of this simple collector design approach on the production of highly oriented electrospun polymer fibers of various chemical compositions. Electro-optical characterization of the P3HT systems shows that oriented fibers exhibit identical optical properties to fibers with random orientation, indicating that the molecular conformation and structural state of the fibers is not affected by the alignment process during electrospinning. On the other hand, aligned fibers exhibit superior electrical properties, as evidenced by the suppression of hysteresis and an increase of photoconductance by up to 2.5 times compared to the respective characteristics of randomly oriented fibers due to an alignment-induced reduction of capacitive parasitic effects.

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“…High molecular weight P3HT (83 kDa) fibers from 24 h aged solution displayed the lowest Isym/Iasym ratio (Table S5), indicating a high conjugation length for that sample. 57,56 Such an increase in conjugation length can be attributed to the increased interchain association, as discussed above. Note that we have observed a maximum ±4 nm peak shift between experiments because of small fluctuations of P3HT and PEO weight ratios and slight variation in the sample preparation conditions (hot plate temperature, relative humidity), however, the overall trend remained the same.…”

Section: Interpreting Self-assembly Of P3ht In the Spinning Solutionmentioning

confidence: 92%

Effects of Poly(3-hexylthiophene) Molecular Weight and the Aging of Spinning Solution on the Electrospun Fiber Properties

Ahmad

Zhang

Liu

et al. 2022

Preprint

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The electrospinning technique has been considered an attractive route for processing conjugated polymers in a significant quantity for large-scale applications. The processing-structure-property relationship of the electrospinning process for conjugated polymers is not well understood. Here, we report the electrospinning of poly(3-hexylthiophene) (P3HT) for three different molecular weights of P3HT: 31, 58, and 83 kDa. Chloroform was used as a solvent, and a high molecular weight poly(ethylene oxide) (PEO) was utilized to facilitate the processing of P3HT. The electrospinning was performed on the freshly prepared and 24 h aged spinning solutions. The aging of the spinning solution led to the self-assembly of P3HT chains, particularly with dominant H-aggregation for 83 kDa P3HT. The structure development and properties of the fibers were investigated, including the single-fiber electrical conductivity measured using a custom-built setup. The electrical conductivity has been found to be increasing with increasing molecular weight, and as high as a five-fold enhancement in single fiber electrical conductivity was obtained compared to the fiber from the freshly-prepared solution. Despite a 25% PEO concentration in the fibers, the maximum electrical conductivity of a single fiber was found to be ≈2.7 X 10^(-5) S/cm, similar to the pristine P3HT thin films. Our study provides an additional understanding of P3HT structure development in electrospun fibers as a function of polymer molecular weight and processing steps and relates that to fiber properties.

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Elaboration and characterization of P3HT–PEO–SWCNT fibers by electrospinning technique

Cited by 11 publications

References 33 publications

Optimization of Sb2S3 Nanocrystal Concentrations in P3HT: PCBM Layers to Improve the Performance of Polymer Solar Cells

Optimization of Sb2S3 Nanocrystal Concentrations in P3HT: PCBM Layers to Improve the Performance of Polymer Solar Cells

Highly Aligned Electrospun Polymer Fibers Produced Using a Corrugated Static Collector

Effects of Poly(3-hexylthiophene) Molecular Weight and the Aging of Spinning Solution on the Electrospun Fiber Properties

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