PEDOT:PSS hydrogel gate electrodes for OTFT sensors

Arthur, Joshua N.; Burns, Samantha; Cole, Cameron M.; Barthelme, Quinlan T.; Yambem, Soniya D.

doi:10.1039/d2tc01096h

Cited by 9 publications

(9 citation statements)

References 43 publications

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“…1−3 All these advantages come along with being processable from aqueous solution, which enables an easy and cheap large-scale device fabrication by printing, spraying, or dip coating. 4−6 Therefore, nowadays the semiconductor PEDOT:PSS can be found in a wide variety of applications, like photovoltaics, 7,8 transistors, 9,10 thermoelectrics, 11,12 light-emitting diodes, 13−15 sensors, 16,17 displays, 18,19 bioelectronics, 20,21 and many more. A lot of these advantages of PEDOT:PSS compared to other polymer-based organic semiconductors result from its unique polymer blend structure, consisting of the excellent p-type semiconductor PEDOT and the water-soluble polyanion PSS.…”

Section: Introductionmentioning

confidence: 99%

“…Poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate), short PEDOT:PSS, is one of the most important and well-known hole conducting polymers for organic electronics, as it brings a lot of positive features, such as its excellent hole conductivity, its low toxicity, and its good optical and mechanical properties. – All these advantages come along with being processable from aqueous solution, which enables an easy and cheap large-scale device fabrication by printing, spraying, or dip coating. – Therefore, nowadays the semiconductor PEDOT:PSS can be found in a wide variety of applications, like photovoltaics, , transistors, , thermoelectrics, , light-emitting diodes, – sensors, , displays, , bioelectronics, , and many more. A lot of these advantages of PEDOT:PSS compared to other polymer-based organic semiconductors result from its unique polymer blend structure, consisting of the excellent p-type semiconductor PEDOT and the water-soluble polyanion PSS.…”

Section: Introductionmentioning

confidence: 99%

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Ionic Liquid-Induced Inversion of the Humidity-Dependent Conductivity of Thin PEDOT:PSS Films

Oechsle,

Schöner,

Deville

et al. 2023

ACS Appl. Mater. Interfaces

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The humidity influence on the electronic and ionic resistance properties of thin post-treated poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films is investigated. In particular, the resistance of these PEDOT:PSS films post-treated with three different concentrations (0, 0.05, and 0.35 M) of ethyl-3-methylimidazolium dicyanamide (EMIM DCA) is measured while being exposed to a defined humidity protocol. A resistance increase upon elevated humidity is observed for the 0 M reference sample, while the EMIM DCA post-treated samples demonstrate a reverse behavior. Simultaneously performed in situ grazing-incidence small-angle X-ray scattering (GISAXS) measurements evidence changes in the film morphology upon varying the humidity, namely, an increase in the PEDOT domain distances. This leads to a detriment in the interdomain hole transport, which causes a rise in the resistance, as observed for the 0 M reference sample. Finally, electrochemical impedance spectroscopy (EIS) measurements at different humidities reveal additional contributions of ionic charge carriers in the EMIM DCA post-treated PEDOT:PSS films. Therefrom, a model is proposed, which describes the hole and cation transport in different post-treated PEDOT:PSS films dependent on the ambient humidity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ionic Liquid-Induced Inversion of the Humidity-Dependent Conductivity of Thin PEDOT:PSS Films

Oechsle,

Schöner,

Deville

et al. 2023

ACS Appl. Mater. Interfaces

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Section: Chemical Sensorsmentioning

confidence: 99%

“…[ 137,140 ] Arthur and coworkers proposed using the PEDOT:PSS hydrogel as the gate electrode for ion sensing, which could manipulate the drain current with a twofold variation by the addition of K + or Na + . [ 141 ] But the sensor showed no selectivity, which resulted in the inaccurate detection of other interfered ions. To solve the issue, Sessolo and coworkers have fabricated an organic‐based sensor by depositing the ion‐selective membrane on a PEDOT‐based organic electrochemical transistor (Figure 7b), which can selectively detect the K + with a high sensitivity of 47 µA dec −1 .…”

Section: Applications Of Micro/nano‐fabricated Conductive Filmsmentioning

confidence: 99%

Micro/Nano‐Fabrication of Flexible Poly(3,4‐Ethylenedioxythiophene)‐Based Conductive Films for High‐Performance Microdevices

Zhang

Yang

et al. 2023

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With the increasing demands for novel flexible organic electronic devices, conductive polymers are now becoming the rising star for reaching such targets, which has witnessed significant breakthroughs in the fields of thermoelectric devices, solar cells, sensors, and hydrogels during the past decade due to their outstanding conductivity, solution‐processing ability, as well as tailorability. However, the commercialization of those devices still lags markedly behind the corresponding research advances, arising from the not high enough performance and limited manufacturing techniques. The conductivity and micro/nano‐structure of conductive polymer films are two critical factors for achieving high‐performance microdevices. In this review, the state‐of‐the‐art technologies for developing organic devices by using conductive polymers are comprehensively summarized, which will begin with a description of the commonly used synthesis methods and mechanisms for conductive polymers. Next, the current techniques for the fabrication of conductive polymer films will be proffered and discussed. Subsequently, approaches for tailoring the nanostructures and microstructures of conductive polymer films are summarized and discussed. Then, the applications of micro/nano‐fabricated conductive films‐based devices in various fields are given and the role of the micro/nano‐structures on the device performances is highlighted. Finally, the perspectives on future directions in this exciting field are presented.

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“…Conductive hydrogels, as an emerging soft material with flexibility, electrical conductivity, and biocompatibility, are promising candidate materials for human motion detection sensors. − However, traditional conductive hydrogel surfaces generally lack adhesion, and auxiliary adhesives are required to fix the hydrogels on human skin when employed as flexible sensors. The auxiliary adhesives often have a high interfacial resistance, which significantly reduces the detection accuracy and precision of the sensors. − Therefore, designing and preparing self-adhesive hydrogels is of great significance.…”

Section: Introductionmentioning

confidence: 99%

Mussel-Inspired Adhesive and Carbon Fiber Conductive Hydrogel for Flexible Sensors

Huang

Tang

Zhu

et al. 2023

ACS Appl. Polym. Mater.

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Conductive hydrogels, which are considered to be a promising material for human motion detection sensors, often display low flexibility, limited elongation, and non-adhesive properties. Herein, a multifunctional hydrogel with self-adhesive, highly stretchable, and conductive properties was developed by introducing polydopamine (DA) and carbon fiber (CF) into polyacrylamide (PAAm) hydrogel. The DA was polymerized with oxygen to form polydopamine (PDA), and the PDA-CF-PAAm hydrogel was hybrid-crosslinked with covalent bonds and recoverable non-covalent bonds including hydrogen bonds and π-π stacking. Therefore, the prepared PDA-CF-PAAm hydrogel exhibits high and reversible stretchability. Additionally, the hydrogel demonstrates high adhesiveness on various substrate surfaces, such as paper, glass, rubber, and biological tissue surfaces due to the catechol groups of PDA. Furthermore, the obtained PDA-CF-PAAm hydrogel is conductive because of the addition of CF. As a result, the self-adhesive, highly stretchable, and conductive PDA-CF-PAAm hydrogel can be directly adhered to the skin as a strain sensor to monitor human body motion. This work may expand the scope of multifunctional hydrogel preparation for flexible wearable devices.

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PEDOT:PSS hydrogel gate electrodes for OTFT sensors

Abstract: Organic thin film transistors (OTFTs) have been extensively investigated for biosensing and bioelectronic applications. The conducting polymer poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonate) (PEDOT:PSS) has been widely used in these devices,...

Cited by 9 publications

References 43 publications

Ionic Liquid-Induced Inversion of the Humidity-Dependent Conductivity of Thin PEDOT:PSS Films

Ionic Liquid-Induced Inversion of the Humidity-Dependent Conductivity of Thin PEDOT:PSS Films

Micro/Nano‐Fabrication of Flexible Poly(3,4‐Ethylenedioxythiophene)‐Based Conductive Films for High‐Performance Microdevices

Mussel-Inspired Adhesive and Carbon Fiber Conductive Hydrogel for Flexible Sensors

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