Synthesis of highly conductive PEDOT:PSS and correlation with hierarchical structure

Horii, Tatsuhiro; Hikawa, Hanae; Katsunuma, Masato; Okuzaki, Hidenori

doi:10.1016/j.polymer.2018.02.034

Cited by 74 publications

(58 citation statements)

References 33 publications

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“…On the one hand, it is necessary for charge carrier introduction/stabilization and easy processability, which is essential for high conductivity. On the other hand, high amounts of excess PSS diminish interdomain charge carrier transport when fabricated as thin film, since the conducting PEDOT‐rich domains are usually embedded into an electrically insulating excess PSS matrix . In addition, the high amount of hygroscopic PSS is known to have a negative influence on the conductivity of the polymer electrode .…”

Section: Introductionmentioning

confidence: 99%

Highly Conducting, Transparent PEDOT:PSS Polymer Electrodes from Post‐Treatment with Weak and Strong Acids

Bießmann

Saxena

Hohn

et al. 2019

Adv Elect Materials

106

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The origin of high conductivity in polymer electrodes based on poly(3,4‐ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is investigated and the resilience against water exposure is tested. Post‐treatment with weak and strong acids, namely, hydrochloric acid (HCl), formic acid (HCOOH), nitric acid (HNO3), and sulfuric acid (H2SO4), is performed and compared to the commonly used ethylene glycol treatment. PEDOT:PSS electrodes with electrical conductivities of up to ≈3000 S cm−1 and high transmittance are obtained. The underlying mechanisms for enhanced conductivity are elucidated by means of electrical (4‐point probe), optical (UV‐Vis spectroscopy), compositional (X‐ray photo‐electron spectroscopy), and structural (grazing‐incidence wide‐angle X‐ray scattering, GIWAXS) characterizations. Selective PSS removal and structural rearrangement of PEDOT‐rich domains due to an enhanced lamellar stacking is identified as major influence on the improvement in electrical conductivity. This beneficial high order is evidenced via additional signals in the GIWAXS patterns, which are altered by subsequent H2O treatment. The PSS removal and structural rearrangement is linked to the acids' strength and dielectric constant. High conductivities are reached by efficient PSS removal via HNO3 or H2SO4 treatment with the drawback of high sensitivity against H2O. By contrast, HCl and HCOOH treatment obtaining a medium enhanced conductivity differ in the amount of PSS removal but show higher H2O resistance.

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Section: Introductionmentioning

confidence: 99%

Highly Conducting, Transparent PEDOT:PSS Polymer Electrodes from Post‐Treatment with Weak and Strong Acids

Bießmann

Saxena

Hohn

et al. 2019

Adv Elect Materials

106

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“…Usually, iron(III) salts or other oxidizing agents are used for the oxidative polymerization of EDOT. 67 However, the photo-oxidative potential of irradiated benzophenone is well-known in literature [68][69][70] and presents a possible route to oxidative polymerization of EDOT to PEDOT without the necessity for other oxidizing agents (which are not present in our system). The polymerization of EDOT in its neat state without prior attachment to the MOF surface cannot be ruled out, but the resulting polymer chains would not be covalently bonded to the MOF crystals and should be removed by the extended extraction performed on the samples.…”

mentioning

confidence: 99%

Direct grafting-from of PEDOT from a photoreactive Zr-based MOF – a novel route to electrically conductive composite materials

et al. 2019

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“…It was noteworthy that GR-PEDOT had a negative charge surface about −19.8 mV. According to the previous research of other groups, the surface charge of PEDOT:PSS was negative (around −80~−89 mv) at various PSS/PEDOT ratios due to coverage by the negatively charged PSS-rich layer [25,26]. As the surface of GR-PEDOT would be homogenously covered with PEDOT:PSS, as the polymer does in the interlayer space, the zeta potential inevitably shifted to the negative region.…”

Section: Discussionmentioning

confidence: 67%

Hybridization of Layered Iron Hydroxide Nanoclays and Conducting Polymer for Controlled Oxygen Scavenger

Kim

Kim²,

Park

2018

Applied Sciences

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We suggest green rust (GR), one of layered nanoclays, as a potential oxygen scavenger. In order to achieve controlled oxygen scavenging ability, GRs were prepared with either sulfate or conducting polymer. X-ray diffraction (XRD) patterns showed that both GRs had hydrotalcite phase with slight differences in crystallinity upon anion type. X-ray adsorption spectra (XAS) indicated that the local structure of both GRs were similar regardless of the type of anion. On the other hand, zeta-potential values of GRs were different from each other according to the type of anion; GR with sulfate showed positive charge and GR with conducting polymer had slight negative charge due to the homogeneous hybridization. Scanning electron microscopy (SEM) also suggested that the hybridization of conducting polymer and GR was fairly homogenous without the formation of phase segregation or serious aggregation. According to the oxygen-scavenging activity test, GR with conducting polymer showed a retarded oxygen-scavenging rate compared with GR with sulfate due to protection and controlled oxidation-reduction by hybridized polymer. The current results suggested that the hybridization of nanoclay with conducting polymer could be utilized in long-term oxygen scavenging applications with a controlled oxidation-reduction reaction.

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Synthesis of highly conductive PEDOT:PSS and correlation with hierarchical structure

Cited by 74 publications

References 33 publications

Highly Conducting, Transparent PEDOT:PSS Polymer Electrodes from Post‐Treatment with Weak and Strong Acids

Highly Conducting, Transparent PEDOT:PSS Polymer Electrodes from Post‐Treatment with Weak and Strong Acids

Direct grafting-from of PEDOT from a photoreactive Zr-based MOF – a novel route to electrically conductive composite materials

Hybridization of Layered Iron Hydroxide Nanoclays and Conducting Polymer for Controlled Oxygen Scavenger

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