Characterization of Solvent-Treated PEDOT:PSS Thin Films with Enhanced Conductivities

Rwei, Syang‐Peng; Lee, Yi-Huan; Shiu, Jia-Wei; Sasikumar, Ragu; Shyr, Uin-Ting

doi:10.3390/polym11010134

Cited by 51 publications

(30 citation statements)

References 30 publications

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“…Note that the conductivity increased from 0.94 to 250 S/ cm (in EtOH) without the addition of DMSO as a conductivity enhancer. This conductivity enhancement is due to the better connection between the conductive PEDOT chains, as the PEDOT and PSS are segregated by polar solvents such as EtOH [24][25][26] . Since EG is a typical conductivity enhancer, it exhibits a high conductivity of 1108 S/cm, even without DMSO.…”

Section: Solvent Exchange Process Using the Ultrafiltration Methodsmentioning

confidence: 99%

Alcohol-based highly conductive polymer for conformal nanocoatings on hydrophobic surfaces toward a highly sensitive and stable pressure sensor

et al. 2020

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Conformal and ultrathin coating of highly conductive PEDOT:PSS on hydrophobic uneven surfaces is essential for resistive-based pressure sensor applications. For this purpose, a water-based poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) solution was successfully exchanged to an organic solvent-based PEDOT:PSS solution without any aggregation or reduction in conductivity using the ultrafiltration method. Among various solvents, the ethanol (EtOH) solvent-exchanged PEDOT:PSS solution exhibited a contact angle of 34.67°, which is much lower than the value of 96.94° for the water-based PEDOT:PSS solution. The optimized EtOH-based PEDOT:PSS solution exhibited conformal and uniform coating, with ultrathin nanocoated films obtained on a hydrophobic pyramid polydimethylsiloxane (PDMS) surface. The fabricated pressure sensor showed high performances, such as high sensitivity (−21 kPa−1 in the low pressure regime up to 100 Pa), mechanical stability (over 10,000 cycles without any failure or cracks) and a fast response time (90 ms). Finally, the proposed pressure sensor was successfully demonstrated as a human blood pulse rate sensor and a spatial pressure sensor array for practical applications. The solvent exchange process using ultrafiltration for these applications can be utilized as a universal technique for improving the coating property (wettability) of conducting polymers as well as various other materials.

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Section: Solvent Exchange Process Using the Ultrafiltration Methodsmentioning

confidence: 99%

Alcohol-based highly conductive polymer for conformal nanocoatings on hydrophobic surfaces toward a highly sensitive and stable pressure sensor

et al. 2020

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“…Having a transparent electrode is especially important for achieving high-performance, semi-transparent electronic devices. Among electrode materials [22][23][24][25], conducting polymer poly (3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is a potential candidate due to its high transparency (over 90%), high conductivity (up to 10 3 S/cm), good flexibility, electrochemical stability, and ease of processing by solution [26][27][28][29][30][31][32][33][34][35][36][37]. Recently, different kinds of PEDOT-based electrodes (such as nanofibrillar PEDOT, micrometer-thick PEDOT paper and free-standing PEDOT:PSS films) have been fabricated and applied successfully onto supercapacitors [38][39][40].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, transparent PEDOT electrodes with high electrical conductivity arein urgent need in supercapacitors. Although dimethyl sulfoxide, ethylene glycol, surfactant or moderate acid treatment could enhance the conductivity of PEDOT:PSS, the obtained conductivity still cannot satisfy the needs ofhigh-performance electronic devices [33][34][35][36]. Concentrated sulfuric acid has demonstrated the ability to significantly enhance the conductivity of PEDOT:PSS [31,32].…”

Section: Introductionmentioning

confidence: 99%

High-Conductivity, Flexible and Transparent PEDOT:PSS Electrodes for High Performance Semi-Transparent Supercapacitors

Song

Qin

et al. 2020

Polymers

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Herein, we report a flexible high-conductivity transparent electrode (denoted as S-PH1000), based on conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), and itsapplication to flexible semi-transparentsupercapacitors. A high conductivity of 2673 S/cm was achieved for the S-PH1000 electrode on flexible plastic substrates via a H2SO4 treatment with an optimized concentration of 80 wt.%. This is among the top electrical conductivities of PEDOT:PSS films processed on flexible substrates. As for the electrochemical properties,a high specific capacitance of 161F/g was obtained from the S-PH1000 electrode at a current density of 1 A/g. Excitingly, a specific capacitance of 121 F/g was retained even when the current density increased to 100 A/g, which demonstrates the high-rate property of this electrode. Flexible semi-transparent supercapacitors based on these electrodes demonstrate high transparency, over 60%, at 550 nm. A high power density value, over 19,200 W/kg,and energy density, over 3.40 Wh/kg, was achieved. The semi-transparent flexible supercapacitor was successfully applied topower a light-emitting diode.

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“…Generally, PANI doped with noble metal nanoparticles (NPs) enhances the electron transfer and improves the conductivity and stability. Therefore, it is used in electrochemical sensing [ 22 , 23 , 24 ] as it provides rapid and accurate sensing [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Comparative Studies of CPEs Modified with Distinctive Metal Nanoparticle-Decorated Electroactive Polyimide for the Detection of UA

Bibi

Hsu

et al. 2021

Polymers

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In this present work, an electrochemical sensor was developed for the sensing of uric acid (UA). The sensor was based on a carbon paste electrode (CPE) modified with electroactive polyimide (EPI) synthesized using aniline tetramer (ACAT) decorated with reduced nanoparticles (NPs) of Au, Pt, and Ag. The initial step involved the preparation and characterization of ACAT. Subsequently, the ACAT-based EPI synthesis was performed by chemical imidization of its precursors 4,4′-(4.4′-isopropylidene-diphenoxy) bis (phthalic anhydride) BPADA and ACAT. Then, EPI was doped with distinctive particles of Ag, Pt and Au, and the doped EPIs were abbreviated as EPIS, EPIP and EPIG, respectively. Their structures were characterized by XRD, XPS, and TEM, and the electrochemical properties were determined by cyclic voltammetry and chronoamperometry. Among these evaluated sensors, EPI with Au NPs turned out the best with a sensitivity of 1.53 uA uM−1 UA, a low limit of detection (LOD) of 0.78 uM, and a linear detection range (LDR) of 5–50 uM UA at a low potential value of 310 mV. Additionally, differential pulse voltammetric (DPV) analysis showed that the EPIG sensor showed the best selectivity for a tertiary mixture of UA, dopamine (DA), and ascorbic acid (AA) as compared to EPIP and EPIS.

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Characterization of Solvent-Treated PEDOT:PSS Thin Films with Enhanced Conductivities

Cited by 51 publications

References 30 publications

Alcohol-based highly conductive polymer for conformal nanocoatings on hydrophobic surfaces toward a highly sensitive and stable pressure sensor

Alcohol-based highly conductive polymer for conformal nanocoatings on hydrophobic surfaces toward a highly sensitive and stable pressure sensor

High-Conductivity, Flexible and Transparent PEDOT:PSS Electrodes for High Performance Semi-Transparent Supercapacitors

Comparative Studies of CPEs Modified with Distinctive Metal Nanoparticle-Decorated Electroactive Polyimide for the Detection of UA

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