Comparer les mobilités contraintes

Diaz, Delphine

doi:10.3917/hyp.131.0145

Cited by 3 publications

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“…The discovery of electrical conductivity in π‐conjugated polymers has sparked considerable activity in both academic and industry electronics research to develop materials that are highly conductive, electrically stable, easily processible and relatively simple to produce at low cost. Of the π‐conjugated polymers with electrical conductivity, many researchers have been attracted by polymers based‐on polyacetylene, polypyrrole, polythiophene, polyphenylene, polyphenylene‐vinylene, polyaniline and poly(3,4‐ethylenedioxythiophene) (PEDOT), and their derivatives. Table 1 summarizes the characteristics of these polymers: the band gap, electrical conductivity, dopant counterion, and chemical structure.…”

Section: Introductionmentioning

confidence: 99%

“…Of the π‐conjugated polymers with electrical conductivity, many researchers have been attracted by polymers based‐on polyacetylene, polypyrrole, polythiophene, polyphenylene, polyphenylene‐vinylene, polyaniline and poly(3,4‐ethylenedioxythiophene) (PEDOT), and their derivatives. Table 1 summarizes the characteristics of these polymers: the band gap, electrical conductivity, dopant counterion, and chemical structure. This class of materials has been extensively implemented as electrodes, electrical conductors (e.g., charge carrier transport layers) and semiconducting active layers in many organic electronic and optoelectronic devices that include light‐emitting diodes, field effect transistors and photovoltaic cells .…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Optical Property with Tunable Band Gap of Cross‐linked PEDOT Copolymers via Oxidative Chemical Vapor Deposition

Lee

Gleason

2014

Adv Funct Materials

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85wileyonlinelibrary.com been attracted by polymers based-on polyacetylene, [ 2,3 ] polypyrrole, [ 4 ] polythiophene, [ 2,5 ] polyphenylene, [ 2 ] polyphenylene-vinylene, [ 2 ] polyaniline [ 6 ] and poly(3,4-ethylenedioxythiophene) (PEDOT), [ 3,7 ] and their derivatives. Table 1 summarizes [2][3][4][5][6][7][8] the characteristics of these polymers: the band gap, electrical conductivity, dopant counterion, and chemical structure. This class of materials has been extensively implemented as electrodes, electrical conductors (e.g., charge carrier transport layers) and semiconducting active layers in many organic electronic and optoelectronic devices that include lightemitting diodes, [ 9 ] fi eld effect transistors [ 10 ] and photovoltaic cells. [11][12][13] These devices have successfully demonstrated high device performance comparable to classical Si-or oxide-based technologies. Polymers based on PEDOT [ 3,14 ] are of particular interest due to their high electrical conductivity, mechanical fl exibility, as well as their stability relative to other conjugated polymers.Oxidative chemical vapor deposition (oCVD) offers a facile approach to synthesize and deposit conjugated polymers irrespective of polymer solubility or the properties of the substrate material. The oCVD method has the merits of good fi lm uniformity [ 7,15 ] over the large areas, high electrical conductivity, [ 15 ] conformal coating on non-planar [ 12,13 ] (e.g., textiles and papers) and patterned [ 16,17 ] (e.g., trench) substrates, and relatively low process temperature [ 15,17 ] (25-150 °C). Previously, we reported on the oCVD synthesis of conjugated homopolymer thin fi lms of the doped conducting polymer PEDOT [ 15,17 ] with systematically tunable band gap over ≈0.3 eV [ 14 ] and excellent adhesion to the substrate through grafting. [ 18 ] The oCVD platform has been demonstrated for the dedoped semiconducting homopolymers polythiophene, [ 19,20 ] polyisothianaphthene, [ 21 ] and polyselenophene. [ 22 ] The oCVD synthesis method has also achieved copolymers from thiophene-3-acetic acid with EDOT [ 23 ] and with pyrrole. [ 24 ] Additionally, 3-thiopheneethanol (3-TE) has been oCVD copolymerized with EDOT. [ 25 ] The oCVD fi lms fi nd application including transparent conductors for electrodes [ 13 ] and carrier transport layers, [ 26 ] sensors [ 23,25,27 ] and electrochromic devices. [ 28 ] Highoptical transmittance conjugated-polymers with electrical conductivity are garnering much attention for the applications in organic optoelectronic devices including organic fi eld-effect-transistors and solar cells. Polymers based on PEDOT are particularly promising candidates with high conductivity, uniform surface planarity and excellent ductility. In this work, homopolymer PEDOT deposited using oxidative chemical-vapordeposition(oCVD) show the maximum conductivity of ≈3500 S/cm. However, their utility is limited due to the relatively low transmittance and abrupt decrease near the red edge in the visible regime. Here, the signifi cantly improved opti...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced Optical Property with Tunable Band Gap of Cross‐linked PEDOT Copolymers via Oxidative Chemical Vapor Deposition

Lee

Gleason

2014

Adv Funct Materials

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“…[1][2][3] High conductivity mainly originated from the p electron migration, while it is restricted in most conjugated polymers due to the limited electrons transfer between p orbitals in the highly structured molecular chains. Introducing conductive heteroatoms into polymers can not only greatly improve their conductivity and redox activity by changing p orbitals and enhancing flexible electrons mobility on the molecular chain, [4][5][6][7] but also encourage the ability to capture and adsorb cations, improving the application potential. [8,9] Conducting polymers can be divided into structural conducting polymers and compound conducting polymers.…”

Section: Introductionmentioning

confidence: 99%

Conducting Polymers Meet Lithium–Sulfur Batteries: Progress, Challenges, and Perspectives

Chen

Zhao

Yang

et al. 2023

Energy & Environ Materials

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Lithium–sulfur (Li–S) batteries have attracted increased interest because of the high theoretical energy density, low cost, and environmental friendliness. Conducting polymers (CPs), as one of the most promising materials used in Li–S batteries, can not only facilitate electron transfer and buffer the large volumetric change of sulfur benefiting from their porous structure and excellent flexibility, but also enable stronger physical/chemical adsorption capacity toward polysulfides (LiPSs) when doped with abundant heteroatoms to promote the sulfur redox kinetics and achieve the high sulfur loading. This review firstly introduces the properties of various CPs including structural CPs (polypyrrole (PPy), polyaniline (PANi), polyethylene dioxothiophene [PEDOT]) and compound CPs (polyethylene oxide (PEO), polyvinyl alcohol (PVA) and poly(acrylic acid) [PAA]), and their application potential in Li–S batteries. Furthermore, the research progress of various CPs in different components (cathode, separator, and interlayer) of Li–S batteries is systematically summarized. Finally, the application perspective of the CPs in Li–S batteries as a potential guidance is comprehensively discussed.

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“…Contudo, a condutividade desses polímeros é menor quando comparada com o polímero não contendo substituição no átomo de nitrogênio, devido a não planaridade das cadeias polipirrólicas, induzidas pelo efeito estérico dos N-substituintes [12]. Apesar disso, a condutividade remanescente da cadeia polimérica é grande o suficiente para permitir o crescimento do filme, sem a ajuda da eletroatividade de alguns grupos redox ligados.…”

Section: Introductionunclassified

Eletrodos de feltro de carbono modificados com filme dimérico de rutênio: aplicação em oxidações eletroquímicas de álcoois

Batalini

Giovani

2016

Eclet. Quim.

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Resumo: Foram preparados filmes poli-[(H 2 O)(L) 2 Ru-O-Ru(L) 2 (OH 2 )]4+ (L=4-metil-4´-pirrol-1-il-butil-2,2´-bipiridina) (poli-dim.), sobre eletrodos de feltro de carbono por eletropolimerização anódica direta do monômero. Esses eletrodos de feltro de carbono modificados por deposição desses filmes foram utilizados como eletrocatalisadores em oxidações de álcoois, a potencial constante de +1,15 V (vs ECS), em pH 1,0 e 6,8. Os álcoois utilizados e seus produtos de oxidação foram: álcool benzílico (benzaldeído), cicloexanol (cicloexanona), 1-feniletanol (acetofenona) e álcool p-metoxibenzílico (p-metoxibenzaldeído). As reações revelaram-se seletivas na obtenção dos produtos com bons rendimentos.Palavras-chave: eletrodos modificados, oxidação eletroquímica, rutênio. FELT CARBON ELECTRODES MODIFIED WITH RUTHENIUM DIMERIC FILM: APPLICATION IN ALCOHOL ELECTROCHEMICAL OXIDATIONS4´-pyrrol-1-yl-buthyl-2,2´-bipyridine) (poly-dim.), on felt carbon electrodes, by direct anodic electropolymerization of the monomer. The electrocatalyst activity of these modified carbon felt carbon electrodes was tested in alcohols oxidations, at constant potential +1.15 V (vs SCE), in 1.0 and 6.8 pH. The started alcohols and the products were: benzyl alcohol (benzaldehyde), cycloexanol (cyclohexanone), 1-

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Comparer les mobilités contraintes

Cited by 3 publications

References 0 publications

Enhanced Optical Property with Tunable Band Gap of Cross‐linked PEDOT Copolymers via Oxidative Chemical Vapor Deposition

Enhanced Optical Property with Tunable Band Gap of Cross‐linked PEDOT Copolymers via Oxidative Chemical Vapor Deposition

Conducting Polymers Meet Lithium–Sulfur Batteries: Progress, Challenges, and Perspectives

Eletrodos de feltro de carbono modificados com filme dimérico de rutênio: aplicação em oxidações eletroquímicas de álcoois

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