A New Composite Structure of PEDOT/PSS: Macro-Separated Layers by a Polyelectrolyte Brush

Yasumoro, Keita; Fujita, Yoneharu; Arimatsu, Hideki; Fujima, Takuya

doi:10.3390/polym12020456

Cited by 6 publications

(7 citation statements)

References 28 publications

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“…For instance, substrate surface modification (e.g., nanoscale roughness) and electrodeposition of chemically modified monomers (e.g., carboxylic-modified EDOT) are demonstrated. , When these approaches are relied upon, the adhesion of PEDOT:PSS onto supporting substrates can be improved but is still restricted to certain substrates or complicated EDOT monomer modification, substantially limiting the applicability of PEDOT:PSS in flexible electronic devices. Except for the problem of weak adhesion between conducting polymers and flexible supporting substrates, appropriate circuit patterning methods are highly sought after for transparent conductive materials to meet industrial needs . Conventional inkjet printing , and laser writing , can create these circuits on a flexible substrate, but these serial processes cause production speed and large area patterning problems.…”

Section: Introductionmentioning

confidence: 99%

“…Except for the problem of weak adhesion between conducting polymers and flexible supporting substrates, appropriate circuit patterning methods are highly sought after for transparent conductive materials to meet industrial needs. 62 Conventional inkjet printing 63,64 and laser writing 65,66 can create these circuits on a flexible substrate, but these serial processes cause production speed and large area patterning problems. Although spin coating, 24 spray coating, 26,67 or blading methods 68 can provide large-scale material spreading, creating conductive circuits on a flexible substrate by photolithography and etching processes can easily damage plastic supports.…”

Section: ■ Introductionmentioning

confidence: 99%

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Metal-Free Transparent Three-Dimensional Flexible Electronics by Selective Molecular Bridges

Chang

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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Flexible and transparent electronics is a new generation of device enabling modern interactive designs, which facilitates the recent development of low-cost, lightweight, and flexible materials. Although conventional indium tin oxide material still dominates the major market, its brittleness and steadily increasing price drive scientists to search for other alternatives. To meet the high demand, numerous metallic or organic conductive materials have been developed, but their poor adhesion toward supporting substrates and the subsequent circuit patterning approach remains problematic. In this study, a robust metal-free flexible conductive film fabrication strategy is introduced. The flexible polyethylene terephthalate (PET) film is utilized as the base, where a poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) conductive layer is tightly linked onto this supporting substrate. An interface activation process, i.e., oxygen plasma treatment, generates PET surface active spots to react with the subsequently introduced poly(vinyl alcohol) (PVA) molecule functional groups. This spatially selective PVA molecular bridge therefore acts as a dual-function intermediate layer through covalent bonding toward PET and hydrogen bonding toward PEDOT:PSS to conjugate two distinct materials. This PEDOT:PSS/PVA/PET film delivers superior physical properties, such as a high conductivity of 38.2 Ω/sq and great optical transmittance of 84.1%, which are well tunable under conductive polymer thickness controls. The film is also durable and can maintain original electrical properties even under serious bending for hundreds of cycles. Relying on these outstanding performances, arbitrary conductive circuits are built on this flexible substrate and can function as normal electronics when integrated with multiple electronic parts, e.g., light-emitting diodes (LEDs). Superior electrical signal outputs are achieved when complicated stereo structures including folding, splicing, interlacing, and braiding are incorporated, enabling the use of these films for flexible three-dimensional electronics assembling. Space identifying smart key and lock pair, origami rabbit-carrot touch response, pressure-stimulated jumping frog, and moving dinosaur recognition designs realize these PEDOT:PSS/PVA/PET film-based human-machine interactive devices. This flexible, transparent, and conductive film generation approach by molecular bridge creation should facilitate future development of flexible or foldable devices with complex circuits.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Metal-Free Transparent Three-Dimensional Flexible Electronics by Selective Molecular Bridges

Chang

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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“…They work as counterions for PEDOT chains and stabilize the insoluble charged PEDOT in aqueous dispersion. There are a number of PEs used for chemical EDOT polymerization for improving its solubility and modifying the PEDOT properties [4,[6][7][8][9]. The most popular PE is polystyrenesulfonate (PSS), which forms with PEDOT a blend best known as PEDOT:PSS.…”

Section: Introductionmentioning

confidence: 99%

Poly(3,4-ethylenedioxythiophene) Electrosynthesis in the Presence of Mixtures of Flexible-Chain and Rigid-Chain Polyelectrolytes

Kabanova¹,

Грибкова²,

Некрасов³

2021

Polymers

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The electrochemical synthesis of poly(3,4-ethylenedioxythiophene) (PEDOT) was first carried out in the presence of mixtures of flexible-chain and rigid-chain polyacids and their Na-salts. Earlier on with the example of polyaniline, we have shown the non-additive effect of the rigid-chain component of polyacid mixtures on the electrodeposition of polyaniline films, their morphology and spectroelectrochemical properties. In this study, we confirmed the non-additive effect and showed that such mixed PEDOT–polyelectrolyte films possess unique morphology, spectroelectrochemical and ammonia sensing properties. The electrosynthesis was carried out in potential cycling, galvanostatic and potentiostatic regimes and monitored by in situ UV–Vis spectroscopy. UV–Vis spectroelectrochemistry of the obtained PEDOT–polyelectrolyte films revealed the dominating influence of the rigid-chain polyacid on the electronic structure of the mixed complexes. The mixed PEDOT–polyacid films demonstrated the best ammonia sensing performance (in the range of 5 to 25 ppm) as compared to the films of individual PEDOT–polyelectrolyte films.

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“…Since the formation of the core-shell structure is caused by PSS, PSS-free PEDOT-based conductive films have also been reported [22,23]. Furthermore, deposition on surface-modified substrates such as hierarchical nanoporous layered glasses [24] and polyelectrolyte brushes [25] has also been studied.…”

Section: Introductionmentioning

confidence: 99%

First-Principle Study on p-n Control of PEDOT-Based Thermoelectric Materials by PTSA Doping

et al. 2021

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PEDOT:Tos, a PSS-free PEDOT-based material, is a promising possible organic thermoelectric material for a practical conversion module because the material reportedly has a large power factor. However, since PEDOT:Tos is mainly reported to be a p-type thermoelectric material, the development of PSS-free PEDOT with n-type thermoelectric properties is desirable. Thus, in order to search for PSS-free PEDOT with n-type thermoelectric properties, we investigated the doping concentration of PTSA dependence of the thermoelectric property using the first-principle calculation. The band structure and the density of state indicated that the n-type thermal electromotive force was attributed to the electrons’ large effective mass. Such electrons were produced thanks to the binding of the dopant PTSA to the benzene ring. The contribution of the electron to the Seebeck coefficient increased with increasing PTSA doping concentrations.

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A New Composite Structure of PEDOT/PSS: Macro-Separated Layers by a Polyelectrolyte Brush

Cited by 6 publications

References 28 publications

Metal-Free Transparent Three-Dimensional Flexible Electronics by Selective Molecular Bridges

Metal-Free Transparent Three-Dimensional Flexible Electronics by Selective Molecular Bridges

Poly(3,4-ethylenedioxythiophene) Electrosynthesis in the Presence of Mixtures of Flexible-Chain and Rigid-Chain Polyelectrolytes

First-Principle Study on p-n Control of PEDOT-Based Thermoelectric Materials by PTSA Doping

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