A Semiconducting Two‐Dimensional Polymer as an Organic Electrochemical Transistor Active Layer

Rashid, Reem B.; Evans, Austin M.; Hall, Lyndon A; Dasari, Raghunath R.; Roesner, Emily; Marder, Seth R.; D'Allesandro, Deanna M.; Dichtel, William R.; Rivnay, Jonathan

doi:10.1002/adma.202110703

Cited by 29 publications

(24 citation statements)

References 49 publications

(86 reference statements)

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“…The capacitance of the Cu 3 (HHTP) 2 film was obtained by fitting the EIS to an equivalent circuit composed of a serial resistance R s , a parallel resistance R p , and a parallel constant phase element (CPE) R s ( R p ‖CPE). A CPE, commonly used in porous materials, is used to extract the capacitance of the Cu 3 (HHTP) 2 film ( 65 ). All the electrochemical measurements were performed in ambient air at room temperature.…”

Section: Methodsmentioning

confidence: 99%

2D metal-organic frameworks for ultraflexible electrochemical transistors with high transconductance and fast response speeds

Jia

Zhao

et al. 2023

Sci. Adv.

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Electrochemical transistors (ECTs) have shown broad applications in bioelectronics and neuromorphic devices due to their high transconductance, low working voltage, and versatile device design. To further improve the device performance, semiconductor materials with both high carrier mobilities and large capacitances in electrolytes are needed. Here, we demonstrate ECTs based on highly oriented two-dimensional conjugated metal-organic frameworks (2D c-MOFs). The ion-conductive vertical nanopores formed within the 2D c-MOFs films lead to the most convenient ion transfer in the bulk and high volumetric capacitance, endowing the devices with fast speeds and ultrahigh transconductance. Ultraflexible device arrays are successfully used for wearable on-skin recording of electrocardiogram (ECG) signals along different directions, which can provide various waveforms comparable with those of multilead ECG measurement systems for monitoring heart conditions. These results indicate that 2D c-MOFs are excellent semiconductor materials for high-performance ECTs with promising applications in flexible and wearable electronics.

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Section: Methodsmentioning

confidence: 99%

2D metal-organic frameworks for ultraflexible electrochemical transistors with high transconductance and fast response speeds

Jia

Zhao

et al. 2023

Sci. Adv.

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“…The organic electrochemical transistors (OECT) based on TIIP films exhibit device‐scale hole mobility of 0.05 cm 2 ·V –1 ·s –1 and a μC* figure of merit of 1.75 F·cm –1 ·V –1 ·s –1 . [ 262 ] Recently, Medina et al . also got a very similar result.…”

Section: Oriented 2d‐cof Filmsmentioning

confidence: 99%

Customizable 2D Covalent Organic Frameworks for Optoelectronic Applications

2023

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2D covalent organic framework (2D-COF), a modular three-dimensional material, is easily influenced by the component module. The assembly of different functionalized modules gives 2D-COF unique performance. The modular structure not only allows for customization but also allows for variety, which gives 2D-COF a wide range of functions. Hence, many building blocks with catalytic, ligand, semiconductor, luminescent, and redox centers are integrated into the COF scaffold. The connection and assembly of such modules determine the nature of the final block material. The intra-layer connections of the modules form a monolayer mesh chemical structure, and the subsequent stacking of the monolayer mesh structure produces the final crystalline porous material-2D-COF. This review describes in detail the potential of COF materials as optoelectronic materials and our understanding of optoelectronic processes, starting from monolayer reticulation chemistry to final 3D stacked structures, thus establishing a new paradigm for the rational design of well-defined novel 2D-COF optoelectronic materials and devices.

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“…We synthesized a LM-H with significant improvement in conductivity and stretchability compared with existing conductive hydrogels 29,30 by mixing alginate and acrylamide (AAm) modified EGaIn with ironical and covalent crosslink, respectively (Fig. 1a & Fig.…”

Section: Design and Preparation Of Lm-hsmentioning

confidence: 99%

Liquid metal-embedded hydrogel sensors for unsupervised learning enabled sign-to-verbal translation

Ma²,

Qin

et al. 2022

Preprint

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Highly stretchable and robust strain sensors are rapidly emerging as promising candidates for a diverse array of wearable electronics and sensing devices. Conductive hydrogels represent a unique class of materials for bioelectronic applications due to their electrical and mechanical adaptability to human body. A common material engineering strategy is thus combining rigid electronic and/or ionic conductors with hydrogels to form conductive and stretchable composites. However, there exist trade-offs between high conductivity and excellent mechanical properties. To address this limitation, we designed a highly conductive yet highly stretchable hybrid hydrogel by simply encapsulating the liquid metal into polyacrylamide-alginate double networks. The resultant hydrogel simultaneously exhibits high conductivity (up to 22 S m-1), low elastic modulus (23 kPa), and ultrahigh stretchability (1500%) with excellent robustness (consistent performance against 12, 000 mechanical cycling), overcoming the traditional trade-off between electrical and mechanical properties. To demonstrate the potential impact of our technology on wearable electronics, a motion monitoring system with Self-Organizing Map was developed to achieve hand gesture monitoring and sign-to-speech translation. The use of our liquid metal-embedded hydrogels could be integral to the development of wearable electronics and human-machine interfaces.

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A Semiconducting Two‐Dimensional Polymer as an Organic Electrochemical Transistor Active Layer

Cited by 29 publications

References 49 publications

2D metal-organic frameworks for ultraflexible electrochemical transistors with high transconductance and fast response speeds

2D metal-organic frameworks for ultraflexible electrochemical transistors with high transconductance and fast response speeds

Customizable 2D Covalent Organic Frameworks for Optoelectronic Applications

Liquid metal-embedded hydrogel sensors for unsupervised learning enabled sign-to-verbal translation

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