A high-performance organic electrochemical transistor based on foam-structured channels prepared using a template washing-off method

He, Shunhao; Xiang, Shanglin; Wang, Junjie; Wang, Kaili; Yu, Liuyingzi; Song, Yuehua; Zhu, Chengcheng; Gong, Zhongyan; Gao, Kun; Kang, Xin; Wang, Tingwei; Yu, Hai‐Dong; Lü, Gang

doi:10.1039/d3tc01491f

Cited by 5 publications

(4 citation statements)

References 44 publications

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“…Further, He et al effectively created a foam-structured PEDOT:PSS film, utilizing the IL EMIM:PF 6 domains induced by phase separation as a template. [158] This foam-like structure resulted in enhanced electrical conductivity (≈570 cm −1 ) and volumetric capacitance (≈72 F cm −3 ), leading to improved transconductance (from 90 μS to 18 mS) and a reduced response time (from 1000 to 300 ms) in the OECTs based on foam-structured PEDOT:PSS channels.…”

Section: Organic Electrochemical Transistorsmentioning

confidence: 99%

“…In addition to the common solid PEDOT:PSS/IL channel layer, He et al fabricated a foam-structured PEDOT:PSS film, which acted as the channel layer for the OECT, by using phase separationinduced domains of the IL EMIM:PF 6 as the template. [158] The OECT was prepared on a bendable PET substrate and its bendability was investigated by its performance under different bending conditions (Figure 12m). After repeated bending for 100 cycles at a bending radius of 15 mm, the transconductance of the OECT based on foam-structured PEDOT:PSS channels remained above 90% of the initial value (Figure 12n), indicating good stability over a certain range of deformation.…”

Section: Organic Electrochemical Transistorsmentioning

confidence: 99%

mentioning

confidence: 99%

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Boosting the Performance of PEDOT:PSS Based Electronics Via Ionic Liquids

Li,

Pang,

Wang

et al. 2024

Advanced Materials

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The conducting polymer poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) offers superior advantages in electronics due to its remarkable combination of high electrical conductivity, excellent biocompatibility, and mechanical flexibility, making it an ideal material among electronic skin, health monitoring, and energy harvesting and storage. Nevertheless, pristine PEDOT:PSS films exhibit limitations in terms of both low conductivity and stretchability, while conventional processing techniques cannot enhance these properties simultaneously, facing the dilemma that highly conductive interconnected PEDOT:PSS domains are susceptible to tensile strain. Via modifying PEDOT:PSS with ionic liquids (ILs), not only a synergistic enhancement of the electrical and mechanical properties can be achieved, but also the requirements for the printable bioelectronic are satisfied. In this comprehensive review, we have undertaken the task of providing a thorough examination of the mechanisms and applications of ILs as modifiers for PEDOT:PSS. First, the theoretical mechanisms governing the interactions between ILs and PEDOT:PSS is discussed detailly. Then, we have reviewed the enhanced properties and the elucidation of the underlying mechanisms achieved through the incorporation of ILs. Next, specific applications of ILs‐modified PEDOT:PSS relevant to bioelectronic devices are presented. Lastly, we offer a concise summary and engage in a discussion regarding the opportunities and challenges in this exciting field.This article is protected by copyright. All rights reserved

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Section: Organic Electrochemical Transistorsmentioning

confidence: 99%

Section: Organic Electrochemical Transistorsmentioning

confidence: 99%

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Boosting the Performance of PEDOT:PSS Based Electronics Via Ionic Liquids

Li,

Pang,

Wang

et al. 2024

Advanced Materials

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“…[ 16 ] Organic electrochemical transistors (OECTs) represent an exemplary platform in which OMIECs such as PEDOT:PSS, combined with GOx as the sensing material, show an electronic output varying with exposure to various glucose concentrations. [ 17 , 18 , 19 , 20 , 21 , 22 ] Recently, n‐type (electron‐transporting) OMIECs have been applied as the OECT channel and gate, exhibiting an abrupt increase in the channel current upon GOx/glucose reaction and a very low limit of detection in the absence of a redox shuttle. [ 23 , 24 ] However, the use of enzymes in the development of scalable biological sensor systems has encountered criticism due to concerns related to protein instability, [ 25 ] gradual leaching over time, sensitivity to factors such as temperature, humidity, toxic chemicals, ionic detergents and pH, [ 26 ] as well as the intricate procedures needed for enzyme immobilization on surfaces.…”

Section: Introductionmentioning

confidence: 99%

Single‐Component Electroactive Polymer Architectures for Non‐Enzymatic Glucose Sensing

Kousseff,

Wustoni,

Silva

et al. 2024

Advanced Science

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Organic mixed ionic‐electronic conductors (OMIECs) have emerged as promising materials for biological sensing, owing to their electrochemical activity, stability in an aqueous environment, and biocompatibility. Yet, OMIEC‐based sensors rely predominantly on the use of composite matrices to enable stimuli‐responsive functionality, which can exhibit issues with intercomponent interfacing. In this study, an approach is presented for non‐enzymatic glucose detection by harnessing a newly synthesized functionalized monomer, EDOT‐PBA. This monomer integrates electrically conducting and receptor moieties within a single organic component, obviating the need for complex composite preparation. By engineering the conditions for electrodeposition, two distinct polymer film architectures are developed: pristine PEDOT‐PBA and molecularly imprinted PEDOT‐PBA. Both architectures demonstrated proficient glucose binding and signal transduction capabilities. Notably, the molecularly imprinted polymer (MIP) architecture demonstrated faster stabilization upon glucose uptake while it also enabled a lower limit of detection, lower standard deviation, and a broader linear range in the sensor output signal compared to its non‐imprinted counterpart. This material design not only provides a robust and efficient platform for glucose detection but also offers a blueprint for developing selective sensors for a diverse array of target molecules, by tuning the receptor units correspondingly.

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Nanoporous Conjugated Polymer Aerogel Films for High‐Performance Electrochemical Transistors

Hu,

Gu,

Yang

et al. 2024

Adv Funct Materials

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Organic electrochemical transistors (OECTs) possess low operating voltage and excellent amplification capability and show promising applications in biosensors and flexible electronics. However, the active layers of OECTs are usually dense films, which show limited ion penetration/transport, resulting in limited performances of OECTs. Here, unprecedented high‐performance flexible multifunctional OECTs based on nanoporous (mainly 2–60 nm), high‐specific‐surface‐area (255–281 m2 g−1), and flexible conjugated polymer aerogel films are developed. The nanoporous structures effectively facilitate ion penetration/transport, leading to significantly enhanced transconductance (48.5–53.5 mS) and on/off ratio (6.4 × 104) of the OECTs compared with those of dense devices. The resulting OECT‐based glucose sensors exhibit an ultralow detection limit of 1 pm, approximately two to three orders of magnitude lower than those of the previously reported OECT glucose sensors, and an ultrabroad detection range of 1 pm–5 m. They can detect trace amounts of glucose in sweat, serum, saliva, and urine in real time. Moreover, the OECTs can be used for high‐performance flexible artificial synapses and electrocardiogram monitoring. This work provides a powerful strategy toward highly sensitive biosensors, artificial synapses, and electrophysiological signal monitoring.

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A high-performance organic electrochemical transistor based on foam-structured channels prepared using a template washing-off method

Abstract: A template washing-off method was used to prepare a PEDOT:PSS foam, which was used as the channel layer in an organic electrochemical transistor (OECT). The OECT showed a transconductance up to 18 mS and a response time down to 300 millisecond.

Cited by 5 publications

References 44 publications

Boosting the Performance of PEDOT:PSS Based Electronics Via Ionic Liquids

Boosting the Performance of PEDOT:PSS Based Electronics Via Ionic Liquids

Single‐Component Electroactive Polymer Architectures for Non‐Enzymatic Glucose Sensing

Nanoporous Conjugated Polymer Aerogel Films for High‐Performance Electrochemical Transistors

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