Influence of the molecular weight and size distribution of PSS on mixed ionic-electronic transport in PEDOT:PSS

Lo, Chen‐Tsyr; Wu, Yuhang; Awuyah, Elorm; Meli, Dilara; Nguyen, Dan My; Wu, Ruiheng; Xu, Bohan; Strzalka, Joseph; Rivnay, Jonathan; Martin, David C.; Kayser, Laure V.

doi:10.1039/d2py00271j

Cited by 34 publications

(42 citation statements)

References 73 publications

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“…As a result, the overall increase in the conductivity upon complexation is dominated by the pre-factor, σ 0 , that is indicative of the long-range connectivity among conductive sites. Our observations support conclusions from prior studies that long-range connectivity is more important than local ordering. ,, …”

Section: Resultsmentioning

confidence: 99%

Role of Complexation Strength on the Photophysical and Transport Properties of Semiconducting Charged Polymer Complexes

Warner

Segalman

et al. 2023

Chem. Mater.

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The high polymer fraction in complexes of conjugated and insulating polyelectrolytes offers unique opportunities for the fabrication of conductive thick films and bulk structures. The electrostatic interactions in these systems further provide a handle for controlling their structure and properties. The impact of charge-mediated complexation strength on the photophysical and electronic transport properties in blends of conjugated polyelectrolytes (CPEs) with oppositely charged polymeric ionic liquids (PILs) was examined. Complexes were formed with varying frequency of charged repeat units, from 50 to 100%, on an anionic polythiophene-based CPE and a complimentary cationic PIL. In highly charged complexes, the intimate mixing between the CPE and the PIL reduced the structural disorder along the CPE backbone, enhancing its intrachain conjugation and interchain stacking. In weakly charged complexes (<90%), these chain planarization effects were absent and microphase separation occurred. At all charge fractions examined, the electrical conductivity of an acid-doped complex was higher than that of the unblended constituent CPE. The highest electrical conductivity, near 1 S cm–1, was found for a charge fraction of 100%. These results demonstrate the potential for designing effective polymeric conductors using electrostatic complexation.

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Section: Resultsmentioning

confidence: 99%

Role of Complexation Strength on the Photophysical and Transport Properties of Semiconducting Charged Polymer Complexes

Warner

Segalman

et al. 2023

Chem. Mater.

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“…Using PEDOT:PSS as a mixed ionic− electronic conductor, it was reported that the molecular weight distribution (MSD) (as opposed to the average molecular weight) of the ionic species [polystyrene sulfonate (PSS)] is a critical parameter influencing the ionic−electronic conductivity of the matrix. 14 In this context, it may be important to emphasize the crystallization behavior of PEO. This polymer (PEO) can form highly crystalline domains at high molecular weights, thus restricting the movement of ions (limiting the penetration of ions in the crystalline domains) 8 compared to the relative ease of ion-movement in the amorphous PSS-rich domains.…”

Section: ■ Introductionmentioning

confidence: 99%

“…They concluded that the ionic–electronic conductivity can be tuned by manipulating the combination of electronic and ionic components within a hybrid composite. Using PEDOT:PSS as a mixed ionic–electronic conductor, it was reported that the molecular weight distribution (MSD) (as opposed to the average molecular weight) of the ionic species [polystyrene sulfonate (PSS)] is a critical parameter influencing the ionic–electronic conductivity of the matrix . In this context, it may be important to emphasize the crystallization behavior of PEO.…”

Section: Introductionmentioning

confidence: 99%

Ionic–Electronic Conductivity in Ternary Polymer/Reduced Graphene Oxide/Polyelectrolyte Nanocomposite Coatings for Potential Application in Energy Storage

Saborío

Maslekar

Yao

et al. 2023

ACS Appl. Nano Mater.

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Polymeric mixed ionic–electronic conductors are desired for a range of applications. The growing interest in the shift from liquid to solid polymer electrolytes further fueled research interest in this domain. However, the predominant research in the field has been limited to binary systems where components are selected for their electronic and ionic conduction. Here, in a systematic study, we have developed ternary nanocomposites comprising an insulating polymer poly(benzyl methacrylate-stat-n-butyl acrylate) used as a binder, reduced graphene oxide as an electronic conductor nanofiller, and different concentrations of polyelectrolytes lignosulfonate (LS) and polystyrene sulfonate as ionic conductors. The developed ternary nanocomposite can be simply coated to obtain a uniform film at ambient temperature, exhibiting mixed ionic–electronic conduction. Scanning electron microscopy–energy-dispersive spectroscopy mapping revealed the distribution of polyelectrolytes throughout the film surface. The nanocomposite coatings exhibited the highest ionic conductivity of ∼54 S m–1 (30 wt % LS relative to monomer) and electronic conductivity of ∼40 S m–1 (7 wt % LS relative to monomer). The obtained ionic–electronic conductivity values were some of the highest reported in the literature (compared against binary systems), despite comprising an insulating binder as a majority component. The present work provides the important fundamental understanding behind the design and fabrication of ternary polymeric mixed ionic–electronic conductive coatings and paves the way for further research in the field. The developed nanocomposite coatings are anticipated to find application in a range of fields including energy storage, biomedical engineering, and sensors.

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“…It has been demonstrated theoretically and experimentally that the template molecular weight (M w ) plays an important role in determining the build-up kinetics of PEDOT complexes and thus the physico-chemical properties. [25][26][27][28] However, precious little attention has been paid to the template M w effect on g s (see Fig. 1b).…”

Section: Introductionmentioning

confidence: 99%

Template molecular weight-dependent PEDOT surface energy: impact on the photovoltaic performance of bulk-heterojunctions

Xiang

Wang

et al. 2022

J. Mater. Chem. A

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Influence of the molecular weight and size distribution of PSS on mixed ionic-electronic transport in PEDOT:PSS

Abstract: The commercially available polyelectrolyte complex poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is ubiquitous in organic and hybrid electronics. As such, it has often been used as a benchmark material for fundamental studies and...

Cited by 34 publications

References 73 publications

Role of Complexation Strength on the Photophysical and Transport Properties of Semiconducting Charged Polymer Complexes

Role of Complexation Strength on the Photophysical and Transport Properties of Semiconducting Charged Polymer Complexes

Ionic–Electronic Conductivity in Ternary Polymer/Reduced Graphene Oxide/Polyelectrolyte Nanocomposite Coatings for Potential Application in Energy Storage

Template molecular weight-dependent PEDOT surface energy: impact on the photovoltaic performance of bulk-heterojunctions

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