Synthesis and Characterization of Poly(3‐Hexylthiophene) for Organic Solar Cells

Santos, Bianca Pedroso Silva; Arias, Jose Jonathan Rubio; Marques, Maria de Fátima Vieira; Furtado, José Geraldo de Melo; Silva, Luiz Alberto; Simão, Renata Antoun

doi:10.1002/masy.201700078

Cited by 5 publications

(4 citation statements)

References 39 publications

(69 reference statements)

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“…The peak at 725 cm −1 is associated with S-atom adsorption on polythiophene ring [45]. The peaks at 1452 cm −1 and 1510 cm −1 (figure S4(a), supporting information) have been assigned to symmetric and asymmetric vibrations of C=C of thiophene rings [47]. The peaks between 2855-2958 cm −1 and the peak at 3056 cm −1 (figure S4(b), supporting information) appear due to the stretching vibration of aliphatic C-H bond and for C=CH respectively [45,46].…”

Section: Resultsmentioning

confidence: 99%

Enhanced luminescence sensing performance and increased intrachain order in blended films of P3HT and cellulose nanocrystals

Alam

Garcia²,

Kiriakou³

et al. 2023

Nanotechnology

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Blended films comprising poly(butyl acrylate) (PBA)-grafted cellulose nanocrystals (CNCs) and poly(3-hexylthiophene) (P3HT), exhibited more intense photoluminescence (PL) and longer PL emission lifetimes compared to pristine P3HT films. Optical absorption and photoluminescence spectra indicated reduced torsional disorder i.e., enhanced backbone planarity in the P3HT@CNC blended composites compared to the bare P3HT. Such molecule-level geometrical modification resulted in both smaller interchain and higher intrachain exciton bandwidth in the blended composites compared to the bare P3HT, because of reduced interchain interactions and enhanced intrachain order. These results indicate a potential switch of the aggregation behavior from dominant H-aggregates to J-aggregates, supported by Raman spectroscopy. The reorganization of micromolecular structure and concomitant macroscopic aggregation of the conjugated polymer chains resulted in a longer conjugation length for the P3HT@CNC blended composites compared to the bare P3HT. Additionally, this nanoscale morphological change produced a reduction in the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) energy gap of the blends, evidenced from optical absorption spectra. Classical molecular dynamics simulation studies predicted the probability of enhanced planarity in the polymer backbone following interactions with CNC surfaces. Theoretical results from density functional theory calculations corroborate the experimentally observed reduction of optical bandgap in the blends compared to bare P3HT. The blended composite outperformed the bare P3HT in nitro-group PL sensing tests with a pronounced difference in the reaction kinetics. While the PL quenching dynamics for bare P3HT followed Stern-Volmer kinetics, the P3HT@CNC blended composite exhibited a drastic deviation from the same. This work shows the potential of a functionalized rod-like biopolymer in tuning the optoelectronic properties of a technologically important polymeric organic semiconductor through control of the nanoscale morphology.

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Section: Resultsmentioning

confidence: 99%

Enhanced luminescence sensing performance and increased intrachain order in blended films of P3HT and cellulose nanocrystals

Alam

Garcia²,

Kiriakou³

et al. 2023

Nanotechnology

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“…As shown in Figure S1 , to obtain the optical band gap, the linearity edge of absorbance is extended and intersected with the energy axis and the band gap values were evaluated using this equation. 34 , 54 − 56 …”

Section: Methodsmentioning

confidence: 99%

“…The absorbance spectra were measured with a spectrophotometer (BLACK-Comet UV/Vis spectrometer). As shown in Figure S1, to obtain the optical band gap, the linearity edge of absorbance is extended and intersected with the energy axis and the band gap values were evaluated using this equation. ,− …”

Section: Methodsmentioning

confidence: 99%

Enhanced Thermoelectric Properties of Poly(3-hexylthiophene) through the Incorporation of Aligned Carbon Nanotube Forest and Chemical Treatments

et al. 2021

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Carbon nanotube/polymer composites have recently received considerable attention for thermoelectric (TE) applications. The TE power factor can be significantly improved by forming composites with carbon nanotubes. However, the formation of a uniform and well-ordered nanocomposite film is still challenging because of the creation of agglomerates and the uneven distribution of nanotubes. Here, we developed a facile, efficient, and easy-processable route to produce uniform and aligned nanocomposite films of P3HT and carbon nanotube forest (CNTF). The electrical conductivity of a pristine P3HT film was improved from ∼10 −7 to 160 S/cm thanks to the presence of CNTF. Also, a further boost in TE performance was achieved using two additives, lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) and tert-butylpyridine. By adding the additives to P3HT, the degree of interchain order increased, which facilitated the charge transport through the composite. Under the optimal conditions, the incorporation of CNTF and additives led to values of the Seebeck coefficient, electrical conductivity, and power factor up to rising 92 μV/K, 130 S/cm, and 110 μW/m K 2 , respectively, at a temperature of 344.15 K. The excellent TE performance of the hybrid films originates from the dramatically increased electrical conductivity and the improved Seebeck coefficient by CNTF and additives, respectively.

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“…The bands at 1376 cm −1 correspond to the bending vibrations of -CH 3 [49,50]. The band at 1460 cm −1 is the characteristic band of C=C symmetric stretching, while that at 1560 is assigned to C=C antisymmetric stretching of the thiophene ring [51][52][53]. The bands 1040 cm −1 and 1020 cm -l are attributed to a C=S stretching vibration and S-O vibrations, respectively.…”

Section: Vibrational Properties Through Ftir Spectroscopymentioning

confidence: 99%

Optical properties and dielectric relaxation of polypyrrole and poly (3-hexylthiophene)

Mohamed,

Rehim,

Hameed

et al. 2023

Phys. Scr.

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In the present work polypyrrole (PPy) and poly (3-hexylthiophene) (P3HT) are prepared via oxidation polymerization, their optical and dielectric properties in comparison with their originating monomers are investigated. The chemical structure of both polymers is confirmed by FTIR spectroscopy. Investigation of optical properties of the prepared polymers showed that the band gap of PPY is 1.25 eV, whereas that of P3HT is 1.79 eV. In addition, P3HT showed a refractive index of high values in the visible region compared to PPy. Dielectric relaxation of both monomers and polymers was studied in the frequency range of 10-1  /Hz <107 for comparison. Furthermore, temperature dependencies of their electrical properties are investigated. The DC conductivity values of PPy and P3HT are found to be 2× 10-7 S/cm and 2× 10-4 S/cm, at T = 313 K, respectively, which is the ranges of semiconductors and conductors reflecting the remarkable enhancement of conductivity according to polymerization process. The temperature dependence of the DC conductivity for the monomers and polymers follows Vogel−Fulcher−Tammann (VFT) equation. The parameters of the frequency-dependent provide basic information for adjustment of the structural properties of the conjugated polymers and finding the theoretical limits controlling the charge transport

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Synthesis and Characterization of Poly(3‐Hexylthiophene) for Organic Solar Cells

Cited by 5 publications

References 39 publications

Enhanced luminescence sensing performance and increased intrachain order in blended films of P3HT and cellulose nanocrystals

Enhanced luminescence sensing performance and increased intrachain order in blended films of P3HT and cellulose nanocrystals

Enhanced Thermoelectric Properties of Poly(3-hexylthiophene) through the Incorporation of Aligned Carbon Nanotube Forest and Chemical Treatments

Optical properties and dielectric relaxation of polypyrrole and poly (3-hexylthiophene)

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