Influence of stereoregularity on the photoinitiated electrical conductivity of poly (3-alkylthiophenes)

Sentein, Carole; Mouanda, B.; Rosilio, A.; Rosilio, C.

doi:10.1016/s0379-6779(97)80049-5

Cited by 18 publications

(9 citation statements)

References 31 publications

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“…P3BT shows overall smaller conductivities than P3HT, regardless of the SA amount or deposition technique (LS or LB) used. This difference is in agreement with previous reports and is mainly attributed to how the side chain of such polymers affects the dimensionality and coplanarity of the conjugated main chain and therefore the interchain interaction [30,31].…”

Section: Electrical Measurementssupporting

confidence: 93%

“…The conductivity values previously reported were acquired through different techniques, whereas P3BT revealed conductivities in an expanded range that goes from 10 −7 to about 200 S m −1 [30][31][32], and among the reports for this polymer the results are from pristine, doped or in blends with other polymers or molecules. Now, for the P3HT the electric conductivities in the literature vary up to ten orders of magnitude from 10 −7 to 10 3 S m −1 considering the neutral, mixed and doped states [33][34][35][36].…”

Section: Electrical Measurementsmentioning

confidence: 78%

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Volatile organic compounds detection by electrical sensors using polyalkylthiophene-based Langmuir–Blodgett films

et al. 2019

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Despite their environmental and health hazards, volatile organic compounds (VOCs) are present in our everyday life (e.g., fuels and solvents). Their detection is of paramount importance for environmental and occupational hazards monitoring. Among other technologies, semiconducting polymers show good capabilities in VOCs detection and identification, thanks to the variation of their electronic properties upon VOC exposure. We fabricated and characterized VOCs sensors depositing thin films of regioregular poly(3-alkylthiophene) derivatives (rr-P3ATs) and stearic acid (SA) onto gold interdigitated electrodes by Langmuir-Blodgett technique. Poly(3-butylthiophene) and poly(3-hexylthiophene) (P3HT) were mixed with SA at different ratios, and their electrical conductivity was used to optimize the film composition. We characterized the optoelectronic and morphological properties of these films, as well as their electrical response to dichloromethane (DCM), tetrahydrofuran and toluene VOC exposure. Both P3AT sensors showed distinct and characteristic responses, highlighting their ability to recognize different VOCs. Moreover, we investigated the sensors saturation and sensitivity to different VOCs. The sensors were still able to detect the VOCs after six cycles, with P3HT remarkably showing no saturation at all for DCM, and the characteristic single VOC response for subsequent exposure to the different VOCs.

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Section: Electrical Measurementssupporting

confidence: 93%

Section: Electrical Measurementsmentioning

confidence: 78%

Volatile organic compounds detection by electrical sensors using polyalkylthiophene-based Langmuir–Blodgett films

et al. 2019

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“…The regioregularity (Fig. 6) also has a profound influence on crystallinity and electrical conductivity [268]. On the other hand, alkyl chain grafted soluble conjugated copolymers incorporating thiophene units have been reported (Scheme 6) [269], which show not only liquid crystal properties (section`Orientation Induced by Template-Synthesis and Liquid Crystalline Conjugated Polymers') but also enhanced photoconductivities and NLO effects owing to ordering of the liquid crystal structures.…”

Section: Conjugated Polymersmentioning

confidence: 99%

Advanced syntheses and microfabrications of conjugated polymers, C60-containing polymers and carbon nanotubes for optoelectronic applications

Dai

1999

Polym. Adv. Technol.

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“…dimensionality of the charge‐transfer route) but also strongly affects the chain conformation and chain packing. A few studies have shown that increasing the molecular regularity can lead to an extended π‐conjugation as well as more dense packing of chains along the π−π stacking direction 8–14. For example, McCullough et al employed molecular mechanics and ab initio calculations to examine the conformation of P3HT with different head‐to‐tail and head‐to‐head configurations 11.…”

Section: Introductionmentioning

confidence: 99%

Theoretical investigations of electronic structure and charge transport properties in polythiophene‐based organic field‐effect transistors

Lan

Yang

2009

Polymer International

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Regioregular poly(3-hexylthiophene) (P3HT) is a hole transport polymer material used in organic field-effect transistors (OFETs)and can reach mobilities as high as 0.1 cm 2 V −1 s −1 . Factors that affect the charge mobility and the transport mechanisms of P3HT-based OFET systems are therefore of great importance. We use quantum mechanical methods to interpret the charge mobility and the transport properties of self-assembled P3HT molecules along the intra-chain and inter-chain directions. Our approach is illustrated by a hopping transport model, in which we examine the variation of charge mobility with torsional angle and the intermolecular distance between two adjacent thiophene segments. We also simulate packed P3HT structures via molecular dynamics (MD) simulations. The MD results indicate that the resultant mobility along the π − π inter-chain direction is significantly less than that along the intra-chain direction. Accordingly, the main charge-transfer route within the P3HT ordered domains is an intra-chain rather than an inter-chain one. The calculation result for the inter-chain hole mobility is around 10 −2 cm 2 V −1 s −1 , which is consistent with experimental data from P3HT single fibril.

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Influence of stereoregularity on the photoinitiated electrical conductivity of poly (3-alkylthiophenes)

Cited by 18 publications

References 31 publications

Volatile organic compounds detection by electrical sensors using polyalkylthiophene-based Langmuir–Blodgett films

Volatile organic compounds detection by electrical sensors using polyalkylthiophene-based Langmuir–Blodgett films

Advanced syntheses and microfabrications of conjugated polymers, C60-containing polymers and carbon nanotubes for optoelectronic applications

Theoretical investigations of electronic structure and charge transport properties in polythiophene‐based organic field‐effect transistors

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