A laser-induced graphene-based flexible and all-carbon organic electrochemical transistor

Ren, Guozhang; Fan, Hongsong; Zhang, Linrong; He, Shunhao; Zhu, Chengcheng; Gao, Kun; Wang, Junjie; Kang, Xin; Song, Yuehua; Gong, Zhongyan; Li, Gongqiang; Lü, Gang; Yu, Hai‐Dong

doi:10.1039/d3tc00342f

Cited by 17 publications

(16 citation statements)

References 72 publications

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“…Fitting the slope of the linear fit to this data yields the materials' figure of merit, mobility volumetric capacitance product (μC*), and is the most common characterization technique for OECTs in the literature, 35,54 despite recent concerns that it overestimates mobility. 55 Representative transfer and output curves of each formulation are shown in Figures S12 and S13, respectively. For accurate μC* determination, determination of thickness is essential.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Improved Organic Electrochemical Transistors via Directed Crystallizable Small Molecule Templating

Flagg,

Cho,

Woodcock

et al. 2024

Chem. Mater.

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Organic electrochemical transistors (OECTs) are of great interest as biosensors and for flexible electronics applications. Historically, processing techniques have been widely used to improve the performance of polymers in organic electronics but have been underutilized in the field of OECTs. Here, we study the effects of a crystallizable small molecule template for improving the performance of poly(3-hexylthiophene-2,5-diyl) (P3HT)-based OECTs. We utilize 1,3,5-trichlorobenzene (TCB) as a crystallizable additive to induce directional crystallization during blade coating. This procedure results in an aligned, highly ordered, and moderately porous layer of the semiconducting polymer. We find that compared to neat P3HT solutions, films cast with TCB additive show a greater than 8× improvement in the steady state figure of merit for OECTs. Additionally, the optimum TCB loading produces anisotropic OECTs where the polymer chain aligned parallel to the current outperforms the perpendicular alignment by more than a factor of 10. We investigated the mechanism of this improvement and found that polymer alignment, polymer ordering, and film porosity all play a role in improving the device performance. Overall, these results demonstrate the importance of processing on the optimization of polymers for OECTs and suggest a route to greatly improve the performance of commercially available hydrophobic polymers.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Improved Organic Electrochemical Transistors via Directed Crystallizable Small Molecule Templating

Flagg,

Cho,

Woodcock

et al. 2024

Chem. Mater.

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show abstract

“…Organic electrochemical transistors (OECTs) have attracted great attention in the fields of biosensing and bioelectronics because of their simple structure, low working voltage (<1 V), and high biocompatibility. − OECTs have been used not only for the detection of biomarkers, such as glucose, − dopamine, , and DNA, but also for pressure sensing − and artificial synapses. − Many measurements have been used to evaluate the performance of OECTs. , The output curve measures the output current from source to drain electrodes at a fixed gate voltage while varying the source-drain voltage. The transfer curve measures the current from the source to drain electrodes at a fixed source-drain voltage while varying the gate voltage.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Testing Methods for Evaluating the Performance of Organic Electrochemical Transistors

Ren

Zhu

et al. 2023

ACS Appl. Electron. Mater.

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As a next-generation electronic device, the organic electrochemical transistor (OECT) is widely spreading in laboratory research and has many practical applications because of the advantages of its simple structure, low operating voltage, and high biocompatibility. However, the evaluation of the performance of OECTs is generally chaotic since there are many testing methods that may yield different results. Herein, we reveal that the testing protocols may largely affect the obtained results of the same OECT. An increase in the sweeping speed of the gate voltage could lead to a drop in the measured performance of OECTs. When a pulsed voltage was applied on the drain electrode, a degradation in the performance of OECTs could also be observed at a short pulse width. This work clarifies the influence of testing methods on the performance evaluation of OECTs. As a result, the development of the field of the synthesis of OECTs may be significantly promoted.

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“…Improving the transconductance is crucial to realizing high-performance OECTs. 8–10 Two types of strategies are used to improve the transconductance of OECTs. One is geometry optimization of the channel layer.…”

Section: Introductionmentioning

confidence: 99%

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

Xiang

Wang

et al. 2023

J. Mater. Chem. C

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A laser-induced graphene-based flexible and all-carbon organic electrochemical transistor

Abstract: As next-generation bioelectronic devices, organic electrochemical transistors (OECTs) have attracted great interest in health monitoring and early diagnosis because of their high sensitivity, easy integration, high flexibility, light weight, and...

Cited by 17 publications

References 72 publications

Improved Organic Electrochemical Transistors via Directed Crystallizable Small Molecule Templating

Improved Organic Electrochemical Transistors via Directed Crystallizable Small Molecule Templating

Assessment of the Testing Methods for Evaluating the Performance of Organic Electrochemical Transistors

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

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