Mechanisms for doped PEDOT:PSS electrical conductivity improvement

Shahrim, Nur’Aishah Ahmad; Ahmad, Zuraida; Azman, Amelia Wong; Buys, Yose Fachmi; Sarifuddin, Norshahida

doi:10.1039/d1ma00290b

Cited by 121 publications

(118 citation statements)

References 126 publications

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“…[99][100][101] Different dopants (e.g., PSS, tosylate, ClO 4 − , BF 4 − ) provide PEDOT with distinct electrical, mechanical, and electrochemical properties. [102][103][104][105][106] PEDOT-based conducting polymers show a tendency to adopt a lamellar stacking with alternating PEDOT and dopant layers. In PEDOT:PSS, due to the large size of the dopant anion and the resultant molecular stacking, the PEDOT chains adopt a coiled configuration with a benzoid structure.…”

Section: Poly(34-ethylenedioxythiophene) (Pedot) and Its Compositesmentioning

confidence: 99%

Recent Progress on Self‐Healable Conducting Polymers

Zhou

Sarkar

et al. 2022

Advanced Materials

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Materials able to regenerate after damage have been the object of investigation since the ancient times. For instance, self‐healing concretes, able to resist earthquakes, aging, weather, and seawater have been known since the times of ancient Rome and are still the object of research. During the last decade, there has been an increasing interest in self‐healing electronic materials, for applications in electronic skin (E‐skin) for health monitoring, wearable and stretchable sensors, actuators, transistors, energy harvesting, and storage devices. Self‐healing materials based on conducting polymers are particularly attractive due to their tunable high conductivity, good stability, intrinsic flexibility, excellent processability and biocompatibility. Here recent developments are reviewed in the field of self‐healing electronic materials based on conducting polymers, such as poly 3,4‐ethylenedioxythiophene (PEDOT), polypyrrole (PPy), and polyaniline (PANI). The different types of healing, the strategies adopted to optimize electrical and mechanical properties, and the various possible healing mechanisms are introduced. Finally, the main challenges and perspectives in the field are discussed.

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Section: Poly(34-ethylenedioxythiophene) (Pedot) and Its Compositesmentioning

confidence: 99%

Recent Progress on Self‐Healable Conducting Polymers

Zhou

Sarkar

et al. 2022

Advanced Materials

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“…It is well known that organic polar solvents can significantly increase the conductivity of PEDOT:PSS films, resulting in a screening effect between the positively charged PEDOT chains and negatively charged PSS chains, thus lowering their coulombic interactions. 60 Here, the extremely high dielectric constant ( ε = 109) of formamide was used during the post-treatment to further improve the conductivity of the hybrid films. 61 The temperature-dependent thermoelectric performance of 1.5 wt% MMIM BF4-modified PEDOT:PSS films with formamide post-treatment was measured (Fig.…”

Section: Resultsmentioning

confidence: 99%

Effects of cation size on thermoelectricity of PEDOT:PSS/ionic liquid hybrid films for wearable thermoelectric generator application

2022

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“…Additionally, the weak mechanical properties can also be improved by mixing or hybridizing the conducting polymer with general-purpose binders [6]. In addition, the electrochemical properties of the conducting polymer can be controlled or improved through synthesis with various organic solvents [8,9,16].…”

Section: Materials For Conductive Pastementioning

confidence: 99%

“…The conductivity enhancement of the PEDOT:PSS film by the addition of high-boiling solvents and polar compounds such as DMSO, DMF, THF, and EG is well known and has been widely studied. Despite the progress in the electrical conductivity of PEDOT:PSS, the mechanism behind these conductivity enhancements is debatable [8]. Huang [9] and Rwei [21] proposed that structural changes may cause the conductivity improvement.…”

Section: Chemical Analysis Of Conductive Pastementioning

confidence: 99%

“…The processing and film-forming properties of the PEDOT:PSS solution can be adjusted and improved by adding small amounts of secondary compounds, such as binders, solvents, surfactants, coupling agents, and thickening agents [6,7]. In addition, the electrical conductivity of the PEDOT:PSS thin films can be increased by treatment with high-boiling polar compounds, e.g., dimethylsulfoxide (DMSO), N,N-dimethylformamide (DMF), ethylene glycol (EG), and tetrahydrofuran (THF) [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of a Conductive Polymer Blend Based on PEDOT:PSS and Its Electromagnetic Applications

et al. 2022

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The purpose of this study is to prepare a resistive lossy material using conducting polymers for electromagnetic wave absorbers. This paper presents a conductive paste largely composed of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) with a polyurethane binder. The various secondary compounds are added in small amounts to an aqueous blended solution in order to enhance the electrical and mechanical properties of the conductive thin film. The synthesized conductive paste is characterized through electrical, chemical, and morphological analyses. The electrical conductivity of the thin film is measured using a four-point probe and surface profiler. The chemical and morphological changes are studied in various experiments using a Raman microscope, X-ray photoelectron spectroscopy, a scanning electron microscope, and an atomic force microscope. In order to verify the applicability of the synthesized conductive paste, which is composed of 70 wt% PEDOT:PSS, 30 wt% polyurethane, and secondary additives (DMAE 0.4 wt%, A-187 0.5 wt%, DMSO 7 wt%, Dynol 604 0.1 wt%, PUR 40 2.5 wt%), the Salisbury screen absorber is fabricated and evaluated in the X-band. According to the results, the absorber resonates at 9.7 GHz, the reflection loss is −38.6 dB, and the 90% absorption bandwidth is 3.4 GHz (8.2 to 11.6 GHz). Through this experiment, the applicability of the PEDOT:PSS-based conductive paste is sufficiently verified and it is found that excellent radar-absorbing performance can be realized.

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Mechanisms for doped PEDOT:PSS electrical conductivity improvement

Abstract: Due to their good electrical conductivity and versatility, conductive polymers (CPs), in particular poly(3,4-ethylene dioxythiophene) (PEDOT):poly(styrene sulphonate) (PSS) have recently attracted considerable research interests in bioelectronics application. This research aims...

Cited by 121 publications

References 126 publications

Recent Progress on Self‐Healable Conducting Polymers

Recent Progress on Self‐Healable Conducting Polymers

Effects of cation size on thermoelectricity of PEDOT:PSS/ionic liquid hybrid films for wearable thermoelectric generator application

Synthesis and Characterization of a Conductive Polymer Blend Based on PEDOT:PSS and Its Electromagnetic Applications

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